Re: [CentOS] Audio/video recording software
On Wed, May 4, 2011 at 09:14, Marko Vojinovic wrote: > > Hi everyone! :-) > > The question is: what would you suggest as an easy-to-use yum-installable app > that could handle a couple of minutes/hours of recording? > > People who are about to use it are complete noobs, and I would like to give > them a user interface of type "start the program, press record, talk for a > while, press stop, press save, quit the program". That is, if something like > that exists for CentOS (version 5.6, if it matters). If your clips are the computer lesson or software demo style, "recordmydesktop" is as noob-proof as you can get. Regarding how to shoot talking heads, I'd envision recording a webcam window, probably contrived but feasible. Mixing other recorded material in would be possible too. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] A round of applause!
On Mon, Apr 11, 2011 at 04:37, Mister IT Guru wrote: > On Sun, 2011-04-10 at 09:39 -0700, Chuck Munro wrote: >> RedHat's move to defend their support business against the >> freeloading distro vendors (we all know who those sharks are!) wasn't >> aimed at CentOS, but it has significantly increased the workload the >> team faces. > > What move did Redhat make? This interests me, do you have a link? I'm aware of this one in the press: http://www.h-online.com/open/news/item/Controversy-surrounds-Red-Hat-s-obfuscated-source-code-release-1200554.html >> Let's be patient and let them get the job done. >> >> Kudos to the CentOS team! Second! -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 6 Update?
On Thu, Apr 7, 2011 at 12:49, Ian Murray wrote: > > >> > These people are priceless and don't deserve to be >> > submitted to the harshness we have been witnessing lately. > > > And everyone else is worthless and deserve the rudeness handed out by the > devs? > Why don't you make comment on that or is that perfectly acceptable because of > "who they are?" A good point. Nobody deserves rudeness. Nobody should push other people to show it. That's just what I am asking for. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 6 Update?
On Thu, Apr 7, 2011 at 08:52, Rudi Ahlers wrote: > On Thu, Apr 7, 2011 at 1:50 PM, Anton Parol > wrote: >> Racism in open source software. That's the first time I've seen that. >> Regardless of your dislike for someone, even if legitimate, comments like >> that are NOT acceptable. >> I suggest you make a swift and sincere apology. >> >> CentOS is free, and you get what you pay for. If you don't like it, fork and >> make your own efforts. I am receiving more than that. In fact, I have received from the CentOS project more than what I could have payed for. And I keep getting even more through the mailing list, wiki, and forums. Every single day. These people are priceless and don't deserve to be submitted to the harshness we have been witnessing lately. I suggest we write up a blurb in the wiki or somewhere explaining the full "When it's ready" case --in the point of view of those responsible for the project, who's else? And then, never, ever again, answer these questions with anything but a link to that page. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Printers, aka an old time sysadmin
On Tue, Apr 5, 2011 at 16:05, wrote: > Well, today, I feel like a real, old time sysadmin. Now, I didn't have to > write a driver in assembly for the printer, but > > Anyone needs any info about hacking a .ppd, feel free to email me; if you > have a beast of a z3200ps, I'll be glad to send you a copy of mine. How about wikifying your experience? -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] if the file changes send email about diff
On Sun, Feb 6, 2011 at 2:38 PM, Michael Klinosky wrote: > kellyremo wrote: >> "Gamin"? can you give a link? Google doesn't bring up relevant links >> regarding it :O "yum search gamin" will surely help. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Terminal with variable sized font
On Sun, Jan 9, 2011 at 1:26 PM, Frank Cox wrote: > On Sun, 09 Jan 2011 02:53:02 -0500 > JohnS wrote: > I wrote a program that manages classified ads. It's designed to run on an > 80x24 screen size with ncurses and it currently runs in gnome-terminal. > > When a customer comes in with a question or change to their ads, the people > who use the program would like to be able to maximize the size of the terminal > window and have the text size increase to match the window size so they can > show the customer what his ad looks like from the other side of the counter. How about running your app under 'screen', then fire up a second gnome-terminal and attach to it with 'screen -x'. Zoom in as desired with regular control-+ sequences. Then minimize and keep it lurking. When user wants to show big text, temporarily switches to the hidden screen and then back again. Probably too contrived? Not "infinite", though. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Terminal with variable sized font
On Sun, Jan 9, 2011 at 1:26 PM, Frank Cox wrote: > I wrote a program that manages classified ads. It's designed to run on an > 80x24 screen size with ncurses and it currently runs in gnome-terminal. > > When a customer comes in with a question or change to their ads, the people > who use the program would like to be able to maximize the size of the terminal > window and have the text size increase to match the window size so they can > show the customer what his ad looks like from the other side of the counter. Can they use Compiz? I have seen guys showing off some control-wheel-something-else combo to zoom the screen. Looks like it's a continuous zoom. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Fixing filenames with directories with spaces in the names
On Tue, Dec 28, 2010 at 2:03 AM, Craig White wrote: > Should be simple and perhaps I'm tired but it's not coming to me. > > In its simplest form... > > for old in `cat "$FILENAME"`;do > echo "$old" > dirname "$old" > new="$(echo $old | sed 's/\*/\-/')" > done Should be new=$(echo "$old" | sed 's/\*/\-/') -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] what process is sending this packet?
On Mon, Dec 27, 2010 at 2:06 PM, Meenoo Shivdasani wrote: > On Mon, Dec 27, 2010 at 9:30 AM, S Mathias wrote: > >> Dec 27 14:11:46 a kernel: [ 6336.992320] O_D_LOG: IN= OUT=lo SRC=127.0.0.1 >> DST=127.0.0.1 LEN=60 >> TOS=0x00 PREC=0x00 TTL=64 ID=61533 DF PROTO=TCP SPT=37263 DPT=25 WINDOW=32792 >> RES=0x00 SYN URGP=0 > >> but where or how could i find out, that what process sends these packets? You can check up the process number using netstat's output. These packets come from an established TCP connection between your SMTP server (DST=127.0.0.1, DPT=25) and a local process (SRC=127.0.0.1, SPT=37263) having source port = 37263. Something like "netstat -ntp | grep 37263" should do. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Text Proccessing script - advice?
On Tue, Dec 21, 2010 at 2:33 PM, wrote:
> If you're not afraid of perl, the Date-Manip module allows comparing time
> and date, among other things.
A dirtier take could be
perl -ne '/,(\d+),(.*),(\d\d):.*/ && ($3>=9) and $s->{$1,$2}++ ; END
{use Data::Dumper; print Dumper($s)}' < data
$VAR1 = {
'01368 2010-12-02' => 4,
'01368 2010-12-03' => 3
};
--
Eduardo Grosclaude
Universidad Nacional del Comahue
Neuquen, Argentina
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos and Bridging
On Fri, Nov 26, 2010 at 2:15 PM, Robert Spangler wrote: > Hello, > > Presently I am running CentOS release 5.5 (Final). I am looking to setup > bridging as I would like to setup some KVM virtual hosts on my system as a > Time to test if ping works: > >> ~ $ ping -c3 192.168.1.254 >> PING 192.168.1.254 (192.168.1.254) 56(84) bytes of data. >> ping: sendmsg: Operation not permitted >> ping: sendmsg: Operation not permitted >> ping: sendmsg: Operation not permitted Did you remember to brctl addif the regular interfaces? -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos podcast on FLOSS weekly
2010/11/18 Jorge Fábregas : > On Thursday 18 November 2010 12:18:16 Les Mikesell wrote: >> check out this week's (142) video podcast at http://twit.tv/floss > > Hey thanks for the tip. I just finished watching it (very interesting > interview). Agree, and I feel compelled to thank KB not only for his technical work but also for devoting his time and patience (and face!) to media-fueling the general attention given to the CentOS project. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Geany plugins out of sync
On Mon, Nov 1, 2010 at 10:18 AM, Steve Huff wrote: > as for the geany-plugins package, it's already updated in SVN but not yet > built. grab the spec from here and build it yourself as a workaround: > > http://svn.rpmforge.net/svn/trunk/rpms/geany-plugins/geany-plugins.spec Thank you very much! Problem solved with your tip! -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Geany plugins out of sync
I'm intending to do some version control, hence looking for some plugins. Geany and geany-plugins packages in Rpmforge seem to be out of sync: Name : geany-plugins Arch : i386 Version: 0.18 Release: 1.el5.rf Name : geany Arch : i386 Version: 0.19.1 Release: 1.el5.rf When both are installed, geany claims that plugins are not "binary-compatible". Frank's own hosted geany RPM (http://www.melvilletheatre.com/articles/el5/geany-0.19.1-1.i386.rpm) is even newer, but no geany-plugins there. Any chance for this to be repackaged? Or, some quick & dirty workaround? Thank you very much in advance! -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] qemu
On Wed, Sep 29, 2010 at 5:39 AM, mattias wrote: > No i can start qemu but no network > I have a bridge br0 with ta0 on it > My start line > qemu debian.5-0.x86.20100901.qcow --curses -net nic -net > tap,ifname=tap0,script=no I have something running along these lines, maybe it can help - There are several things to check up when it comes to qemu networking /usr/sbin/brctl addbr br0 /sbin/ifconfig eth0 0.0.0.0 /usr/sbin/brctl addif br0 eth0 /sbin/ifconfig br0 10.0.2.10 netmask 255.255.255.0 up /sbin/route add -net 10.0.2.0 netmask 255.255.255.0 br0 /sbin/route add default gw 10.0.2.1 br0 /usr/sbin/tunctl -b -u $USER /sbin/ifconfig tap0 up /usr/sbin/brctl addif br0 tap0 /sbin/iptables -I RH-Firewall-1-INPUT -i br0 -j ACCEPT /usr/bin/qemu -hda $DISK -no-acpi -m 2000 \ -nographic -daemonize \ -net nic,macaddr=52:54:00:11:22:33 \ -net tap,ifname=tap0,script=no & -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] qemu
On Tue, Sep 28, 2010 at 10:45 AM, mattias wrote: > tis 2010-09-28 klockan 10:33 -0300 skrev Eduardo Grosclaude: >> On Tue, Sep 28, 2010 at 10:25 AM, mattias wrote: >> > tis 2010-09-28 klockan 10:13 -0300 skrev Eduardo Grosclaude: >> >> On Tue, Sep 28, 2010 at 8:06 AM, mattias wrote: >> >> > i have the qemu from centos yum repo >> >> > tis 2010-09-28 klockan 01:20 -0700 skrev John Doe: >> >> >> From: mattias >> >> >> >> >> >> > How to start qemu in textmode >> >> >> > The --curses option are removed >> >> >> >> Perhaps you want --nographic? >> >> >> > i have tryed it but qemu says >> > cant load /dev/kqemu or something >> >> That message doesn't seem related to text mode qemu operation to me. >> Please do "yum install dkms-kqemu". Then do "modprobe kqemu" if needed. >> > can i run multiple instances of qemu? > there is a choice demonize or how it spells You can certainly run a number of qemu instances. You can detach from terminal with -daemonize. Use it when launching from system scripts at boot, etc. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] qemu
On Tue, Sep 28, 2010 at 10:25 AM, mattias wrote: > tis 2010-09-28 klockan 10:13 -0300 skrev Eduardo Grosclaude: >> On Tue, Sep 28, 2010 at 8:06 AM, mattias wrote: >> > i have the qemu from centos yum repo >> > tis 2010-09-28 klockan 01:20 -0700 skrev John Doe: >> >> From: mattias >> >> >> >> > How to start qemu in textmode >> >> > The --curses option are removed >> >> Perhaps you want --nographic? >> > i have tryed it but qemu says > cant load /dev/kqemu or something That message doesn't seem related to text mode qemu operation to me. Please do "yum install dkms-kqemu". Then do "modprobe kqemu" if needed. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] qemu
On Tue, Sep 28, 2010 at 8:06 AM, mattias wrote: > i have the qemu from centos yum repo > tis 2010-09-28 klockan 01:20 -0700 skrev John Doe: >> From: mattias >> >> > How to start qemu in textmode >> > The --curses option are removed Perhaps you want --nographic? -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Sat, Sep 18, 2010 at 10:11 AM, Robert P. J. Day wrote: > On Sat, 18 Sep 2010, Eduardo Grosclaude wrote: > >> On Sat, Sep 18, 2010 at 5:06 AM, Robert P. J. Day >> wrote: >> >> > p.s. one stupendously trivial idea i had was to give each student >> > a cheap USB drive and use that as the vehicle for playing with >> > filesystem utilities. with an $8 2G drive, i can demonstrate >> > concepts like hotplugging, udev, LVM and so on, knowing i'll never >> > risk the contents of the hard drive. >> >> That reminds me of a sysadmin course where we set up minimal, >> console-only QEMU virtual machines with two virtual disks, and >> taught fdisk, mkfs, RAID, LVM and the like. > > interesting ... is this course publicly available? be fun to take a > look at it. The course materials were just the labs, along with succinct syntax notes. Exercises were just "partition that drive according to the following criteria", "create a PV/VG/LV that size", "build a level 1 RAID volume", "declare that RAID component invalid", that sort of things. Theory was kept at a minimum and was orally exposed. When managing educational efforts, I have encouraged instructors to concentrate in hands-on training, write minimal labs guides, and take the "Internet is already filled with info" approach wrt other docs. Of course, guidance was given about where and what to read: look for docs from your distro, learn to know when docs are out of date, etc. My experience is that non-academia students, while enthusiastic, lack studying muscle, and handouts you throw at them are seldom read or understood. Face-to-face is different; that's the place where your theory should go. However, they can build up a practical understanding of the task they must accomplish, so they can attempt to read documentation later. The labs should pull the theory, while University does the other way around. I found out this while being an instructor for Cisco CCNA program -- it wasn't an easy switch. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Sat, Sep 18, 2010 at 5:06 AM, Robert P. J. Day wrote: > p.s. one stupendously trivial idea i had was to give each student a > cheap USB drive and use that as the vehicle for playing with > filesystem utilities. with an $8 2G drive, i can demonstrate concepts > like hotplugging, udev, LVM and so on, knowing i'll never risk the > contents of the hard drive. That reminds me of a sysadmin course where we set up minimal, console-only QEMU virtual machines with two virtual disks, and taught fdisk, mkfs, RAID, LVM and the like. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Fri, Sep 17, 2010 at 3:09 PM, Les Mikesell wrote: > On 9/17/2010 12:45 PM, m.r...@5-cent.us wrote: >> >>> I don't get it. Why wouldn't you just talk to the db directly with >>> perl's dbi/dbd, replacing both the awk and C parts? I do that all the >>> time. Or was that before dbi - or the dbd you needed? >> >> Mike, you really aren't reading all of what I wrote. Perl itself wasn't >> available in '91-'92. > > I think you are mistaken about that. "Programming Perl", covering > version 4 of perl was published in 1991. Check the printing history if > you have a newer copy. Perl itself goes back to 1987 or so. I'm pretty > sure I wrote things in version 1 downloaded through usenet. Not sure > when dbi/dbd came around but before that there were things like oraperl > with specific database clients grafted in. I used Perl4 under DOS to write connective tissue for my business systems in C back in '92. But then, awk under DOS did a lot of help too. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] looking for cool, post-install things to do on a centos 5.5 system
On Fri, Sep 17, 2010 at 4:39 AM, Robert P. J. Day wrote: > logging utilities? intrusion detection? monitoring? anything that > leaps to mind that i can use to fill up a few more hours. i'm already > thinking of showing how to build and boot a new kernel. other ideas? > thanks. If your students are new to RHEL/CentOS admin, they will appreciate some education regarding what and how to search into docs and other information sources: the Guides, CentOS community resources such as Forum, Wiki or this mailing list. Proper scripting abilities are perhaps beyond reach for a short course, but you could at least show off some one-liners or those short, stunningly useful examples to help them get the idea that they definitely should get their feet wet on it sooner or later. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Freezing gnome terminals...
On Mon, Aug 30, 2010 at 9:47 AM, John Doe wrote: > From: Kahlil Hodgson > > >> I would leave a terminal open (with an ssh session to a remote site), > come > >back > > >> on monday and type a few commands and it jwould just freeze. > > >> But it also happen from time to time randomly during the day (but > still > >with > > >> days old terminals). > > And it is not a simple timeout; it is a total terminal freeze. > The thing is that, on monday, I can still use it a little bit before it > freezes... > I would do a ls or df... and it works for a while and then it freezes in > the > middle of the output... > I am having a similar problem. I have some CentOS boxes serving SSH inside the network, and I reach them from home across an older Fedora 3 gateway box. Some variable time after I quit working for a while (perhaps around two minutes, but sometimes much longer), the connection is lost. It has stunned me also, that when you are back at the keyboard, you can get some characters through before the connection shuts down. Would like to have it explained. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Stuttering sound
On Tue, Aug 10, 2010 at 1:49 PM, ken wrote: > On 08/10/2010 10:09 AM Eduardo Grosclaude wrote: > >> Thank you very much, people, my issue was resolved as per > > https://bugzilla.redhat.com/show_bug.cgi?id=586532 Comment 22 > > Somehow I managed to miss it in my prior quest. > > I've been having the same problem and have changed /etc/modprobe.conf in > the way specified in Comment 22 mentioned above. How can I now reload > the sound system... without rebooting? > You should rmmod and then modprobe several modules (such as in 'lsmod | grep snd'). I always ended up rebooting, as in my system, they are nightmarishly interdependent. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Stuttering sound
On Tue, Aug 10, 2010 at 9:34 AM, James Pearson wrote: > > -Audacious plays OK but other applications have problems. > > -For instance, mplayer acts quirky: when I pause a playing video, sound > > keeps stuttering endlessly. The same happens sometimes when I close > mplayer > > window. > > You could changing model=auto to model=toshiba > > You might also try removing the probe_mask=1 line > Thank you very much, people, my issue was resolved as per https://bugzilla.redhat.com/show_bug.cgi?id=586532 Comment 22 Somehow I managed to miss it in my prior quest. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Stuttering sound
Dear List,
After some googling around without any results, I'm quite puzzled. Since
some past update I can't precise, kernel 2.6.164 works fine, however 2.6.194
has some sound problem in my somewhat old and beaten Toshiba laptop.
-Audacious plays OK but other applications have problems.
-For instance, mplayer acts quirky: when I pause a playing video, sound
keeps stuttering endlessly. The same happens sometimes when I close mplayer
window.
-system-config-soundcard detects the card and starts to play sample but
stuttering all the way, repeating every 4th of a second or so some 16 times,
at about a 1/2 second rate.
-Youtube has no sound!
-Software volume control has been lost long ago, unrelated to this problem
but interested in recovery anyway
System is fully up to date. Any hints will be appreciated!
Some relevant lines in my /etc/modprobe.conf as is now, with some scars left
after unfruitful battles:
alias snd-card-0 snd-hda-intel
#options snd-card-0 index=0
#options snd-hda-intel index=0
remove snd-hda-intel { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; };
/sbin/modprobe -r --ignore-remove snd-hda-intel
options snd-hda-intel model=auto
options snd-hda-intel probe_mask=1
options snd cards_limit=8
getinfo.sh output:
== BEGIN uname -rmi ==
2.6.18-194.8.1.el5 i686 i386
== END uname -rmi ==
== BEGIN rpm -q centos-release ==
centos-release-5-5.el5.centos
== END rpm -q centos-release ==
== BEGIN getenforce ==
Disabled
== END getenforce ==
== BEGIN rpm -qa kernel\* | sort ==
kernel-2.6.18-164.15.1.el5
kernel-2.6.18-194.3.1.el5
kernel-2.6.18-194.8.1.el5
kernel-devel-2.6.18-164.15.1.el5
kernel-devel-2.6.18-194.3.1.el5
kernel-devel-2.6.18-194.8.1.el5
kernel-headers-2.6.18-194.8.1.el5
== END rpm -qa kernel\* | sort ==
== BEGIN lspci ==
00:00.0 Host bridge: Intel Corporation Mobile 915GM/PM/GMS/910GML Express
Proces
sor to DRAM Controller (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile 915GM/PM Express PCI Express
Root P
ort (rev 03)
00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
High
Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
PCI Ex
press Port 1 (rev 04)
00:1c.1 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
PCI Ex
press Port 2 (rev 04)
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) US
B UHCI #1 (rev 04)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) US
B UHCI #2 (rev 04)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) US
B UHCI #3 (rev 04)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) US
B UHCI #4 (rev 04)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) US
B2 EHCI Controller (rev 04)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev d4)
00:1f.0 ISA bridge: Intel Corporation 82801FBM (ICH6M) LPC Interface Bridge
(rev
04)
00:1f.2 IDE interface: Intel Corporation 82801FBM (ICH6M) SATA Controller
(rev 0
4)
01:00.0 VGA compatible controller: ATI Technologies Inc M24 [Radeon Mobility
X60
0]
02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8036 PCI-E
Fast Et
hernet Controller (rev 10)
06:04.0 Network controller: Intel Corporation PRO/Wireless 2200BG
[Calexico2] Ne
twork Connection (rev 05)
06:06.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller
06:06.1 FireWire (IEEE 1394): Texas Instruments PCIxx12 OHCI Compliant IEEE
1394
Host Controller
06:06.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card
Reader
(SD/MMC/MS/MS PRO/xD)
06:06.3 SD Host controller: Texas Instruments PCIxx12 SDA Standard Compliant
SD
Host Controller
== END lspci ==
== BEGIN lspci -n ==
00:00.0 0600: 8086:2590 (rev 03)
00:01.0 0604: 8086:2591 (rev 03)
00:1b.0 0403: 8086:2668 (rev 04)
00:1c.0 0604: 8086:2660 (rev 04)
00:1c.1 0604: 8086:2662 (rev 04)
00:1d.0 0c03: 8086:2658 (rev 04)
00:1d.1 0c03: 8086:2659 (rev 04)
00:1d.2 0c03: 8086:265a (rev 04)
00:1d.3 0c03: 8086:265b (rev 04)
00:1d.7 0c03: 8086:265c (rev 04)
00:1e.0 0604: 8086:2448 (rev d4)
00:1f.0 0601: 8086:2641 (rev 04)
00:1f.2 0101: 8086:2653 (rev 04)
01:00.0 0300: 1002:5462
02:00.0 0200: 11ab:4351 (rev 10)
06:04.0 0280: 8086:4220 (rev 05)
06:06.0 0607: 104c:8039
06:06.1 0c00: 104c:803a
06:06.2 0180: 104c:803b
06:06.3 0805: 104c:803c
== END lspci -n ==
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Re: [CentOS] NAT via /etc/sysconfig/iptables
On Mon, Aug 2, 2010 at 1:45 PM, Boris Epstein wrote: > Hello listmates, > > It's been a few years since I've set up a router... and for some > reason I seem to be getting hung up on this one. > > Does anybody have a sample iptables config file that would incorporate > NAT and forwarding for a simple router? I found project quicktables very helpful (http://freshmeat.net/projects/quicktables). -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Simple solution for small network in a school ?
On Sat, Jul 10, 2010 at 11:59 AM, Niki Kovacs wrote: > > Hi, > > I have to install a small network in a school in a nearby village. The > network will be Linux-only, one server and fifteen desktops. Here's the > idea. > > 1) Authentication should be managed centrally on the server. > 2) User home directories should also be on the server. > 3) Users should all have disk quotas, something like 1 GB per user. > 4) Some shared directories should be read/write for a defined group of > users (teachers) and read-only for others. We have a similar setup with OpenLDAP and NFS. Works OK, except all directories defined are home to the users, and only their owner can read them. Adding users or changing passwords is an admin-only hassle, because we have never found a user management tool for LDAP which was convincingly able to be given away to teachers. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] autoexpect?
On Mon, May 31, 2010 at 1:21 AM, hadi motamedi wrote: > > >> yum -y install packagename >> > Thank you very much for your reply. It seems that 'autoexpect' must come > with 'expect' script package . Am I right ? Yes. To find out what package a program (or file) comes with, you can say yum provides "*/autoexpect" You must prefix it with "*/" to correctly locate any program. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] tricky perl question - ascending order
On Sun, May 23, 2010 at 5:39 PM, Jozsi Vadkan wrote:
> The solution [from the FreeBSD mailing list]:
>
> perl -00 -e 'print map $_->[0], sort { $a->[1] <=> $b->[1] } map [$_,
> tr/\n//], <>' < before.txt > after.txt
Wow...
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Re: [CentOS] tricky perl question - ascending order
On Sun, May 23, 2010 at 1:15 PM, Jozsi Vadkan wrote:
> or maybe in bash..
> script/"one liner" e.g.: input: http://pastebin.com/raw.php?i=pMZPEsMZ
>
> i want to make this output from it:
> http://pastebin.com/raw.php?i=kH8VxT0A
>
>
> So from the input, i want to make an ascendant order, how many things
> are under a "SOMETHING-XX"
>
> Does anyone has any "perl magic" in the pocket, how to do this? :D
Ok, I'l bite, hope John D. isn't looking...
This is as close as I can get. I shall confess I'm cheating; I had to
add two extra blank lines at the beginning of your file. Don't know if
allowed.
Also, SOMETHING-blocks look collapsed; don't know if bug or feature
for you :D Anyway, it can make for a start.
perl -ne '$/="\n\n"; @a=split(); push
@b,({q=>scalar(@a),l=>[...@a]});END{for $i (sort {$a->{q} <=> $b->{q}}
@b) {print "@{$i->{l}}\n"}}' < raw.txt
SOMETHING-85-uj sfvtc
SOMETHING-86 yxcver
SOMETHING-88 yxfrf yxwwcc
SOMETHING-82-H sdfyxcv asdfyxcv asdfgyx
SOMETHING-82 lajsldfj alsdfjlas djfalsd asdfasd dsfx
SOMETHING-85 xdfvqe asdwe yxccv cxvbe wdyfv qyxvvy yxcvtg yxcvgt
For the sake of really helping, let's analyze a bit:
$/= we are replacing record separator for split()
@a = split() split in list context, give me the actual lines
$a = scalar(@a) give me the number of lines
@b is a list to throw our (#lines, lines) pairs into
{q=>$a,l=>[...@a]} is a hash with two keys, q (#lines) and l (lines)
END{} when all else is done
sort {$a->{q} <=> $b->{q}} @b give me b sorted by q
print "@{$i->{l}}\n" print each l element as a list
HTH
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Re: [CentOS] Text file manipulation in CentOS?
On Wed, May 12, 2010 at 1:12 AM, hadi motamedi wrote: > > >> $ cat hadi | sort | uniq -c -w 9 | sort -n | perl -ne 'print unless >> /(\d+)/ and $1 < 3' >> 4 CallId 91 State TK Bts 5 Bt 1 Tr (4 0x0f) E1 (4 0 >> 18) Tru (0 1 1) >> 7 CallId 92 State CL Bts 7 Bt 1 Tr (6 0x0a) E1 (3 1 > > Thank you for your reply. To just have one 'State' for the CallId , I > created one new logfile as the following: > #more logfile1 | grep "State TK" >> logfile2 > Then in the logfile2 , I tried to count the number of occurances of each > distinct CallId with the aid of your proposed command . But in the output, I > see differences between the number obtained from counting them manually with > the one generated from your command. Can you please correct me? Please enclose a copy of your commands and the output. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Text file manipulation in CentOS?
On Tue, May 11, 2010 at 8:12 AM, hadi motamedi wrote: > > >> Does this help? >> The first number is the number of occurrences of each CallId > > Thank you for your help. It is very important for me to how the number of > occurances of each CallId# . But can you please let me know why the number > obtained from your code does not match with manual counting on say one of > the CallId#? Can you please correct me? Oh, that's because uniq thinks that two lines are different if your characters TK,CL... and the rest of the line are different. If you want to count lines only by the number following CallId you should tell uniq to compare only the first characters in the line: $ cat hadi | sort | uniq -c -w 9 | sort -n | perl -ne 'print unless /(\d+)/ and $1 < 3' 4 CallId 91 State TK Bts 5 Bt 1 Tr (4 0x0f) E1 (4 0 18) Tru (0 1 1) 7 CallId 92 State CL Bts 7 Bt 1 Tr (6 0x0a) E1 (3 1 22) Tru (0 0 0) 7 CallId 94 State TK Bts 7 Bt 1 Tr (6 0x0f) E1 (7 0 15) Tru (0 0 2) 7 CallId 9 State TK Bts 7 Bt 2 Tr (13 0x09) E1 (4 1 5) Tru (0 3 0) (note -w 9). -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Text file manipulation in CentOS?
On Tue, May 11, 2010 at 5:51 AM, hadi motamedi wrote: > > >> I don't quite understand this part. >> > Thank you very much for your reply.Please find below a segment of the file: If you give the following command: sort YOUR_FILE | uniq -c | sort -n | perl -ne 'print unless /(\d+)/ and $1 < 3' where YOUR_FILE's contents are exactly the lines you pasted earler you will get: 3 CallId 91 State TK Bts 5 Bt 1 Tr (4 0x0f) E1 (4 0 18) Tru (0 1 1) 4 CallId 92 State TK Bts 7 Bt 1 Tr (7 0x08) E1 (3 1 22) Tru (0 0 0) 5 CallId 94 State TK Bts 7 Bt 1 Tr (8 0x0c) E1 (7 0 15) Tru (0 0 2) 7 CallId 9 State TK Bts 7 Bt 2 Tr (13 0x09) E1 (4 1 5) Tru (0 3 0) The first number is the number of occurrences of each CallId Does this help? -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Not firewall, but what?
On Fri, May 7, 2010 at 11:47 AM, Eduardo Grosclaude wrote: >>> > You could test yourself if you can see >>> > http://62.236.221.71 (the problem system) >>> > http://62.236.221.78 (another guest on the same xen host) Sure your network masks are OK? -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Not firewall, but what?
On Fri, May 7, 2010 at 7:17 AM, Didi Hoffmann wrote: > On Fri, 2010-05-07 at 09:14 +0100, Tony Molloy wrote: >> > You could test yourself if you can see >> > http://62.236.221.71 (the problem system) >> > http://62.236.221.78 (another guest on the same xen host) >> > >> > If someone *cannot* see the 1st one, then it would be interesting to >> > know if (s)he can see the 2nd one or not. >> > >> > - Jussi >> > >> >> OK I can see the second one but not the first. >> >> I can also ping the second one but not the first. > > + 1 Same from this side of the world -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] PAPI + perfctr on CentOS 5?
Has anyone succesfully compiled a PAPI+perfctr-enabled kernel? I've been mixing and matching instructions from the PAPI distribution and those from CentOS wiki to no avail. TIA -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS-friendly wiki engine ?
On Fri, Apr 16, 2010 at 7:34 AM, Niki Kovacs wrote: > Hi, > > One of our local town halls has asked me to implement a wiki-based > website dedicated to ecological farming. The wiki is supposed to host a > variety of documents in text, video and audio format. > > I've never used any wiki engines myself. Is there any one you can > recommend in particular ? I'm using CentOS 5 on the server, so I would > be glad to use a solution where I don't have to jump through burning > loops (e. g. install a more recent version of PHP/Python/whatever) to > make it work. CentOS Wiki uses Moin-moin. It is readily yummable (yum install moin). -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Motherboards for HPC applications
On Wed, Mar 10, 2010 at 2:05 AM, Christopher Chan wrote: > On the Intel side, a dual socket solution > will even outperform a quad socket solution so if one is looking for > Intel cpu solutions, dual socket is the only sensible choice. But that Wow, that's a pretty impressive statement, can you elaborate on that? You mean, for every possible workload? Is it something you learned from direct experience, or have you read about it? If so, where? If from experience, what was the general setup, applications, etc? Thank you very much again for all your responses -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Motherboards for HPC applications
On Tue, Mar 9, 2010 at 1:08 AM, John R Pierce wrote: > for a high performance compute cluster, you'll probably want to use > management software like Oscar, which integrates system management with > MPI based distributed computing such that you can manage a cluster of > 100s of servers like its a single big system I've been using Kusu with much success. Sadly, you're pretty much on your own there as the project seems unsupported or sucked dry out by Platform.com. I hope it to fully reincarnate in Red Hat's HPC proposal and that it eventually makes its way into CentOS. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Motherboards for HPC applications
On Tue, Mar 9, 2010 at 12:49 AM, Christopher Chan wrote: > On Tuesday, March 09, 2010 12:34 AM, Eduardo Grosclaude wrote: >> Hello, >> Can somebody recommend CentOS-OK, dual socket motherboards for compute >> elements? A quick look up at Intel pages suggests they are thinking of >> them as "server boards", but then they recommend them as "for SMB", >> I'm somewhat puzzled about it. >> It would be nice to know what MBs you are using, pros and cons. >> Thank you in advance >> > > Could you give us a bit more information on the HPC part? Is this > clustering or computing? I'll be buying a single machine first, building a cluster some time later. As this second move may be delayed for an unpredictable amount of time, what I am really interested in is understanding the thought process a seasoned technician (sysadmin? clusadmin?) may follow when selecting hardware. Do you have high i/o needs? Well, perhaps this is my real problem... Don't have enough info about applications. There are several of them but I think I/O is not at premium, rather CPU computing is. Thank you very much, Christopher -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Motherboards for HPC applications
On Mon, Mar 8, 2010 at 1:44 PM, Gordon McLellan wrote: > On Mon, Mar 8, 2010 at 11:34 AM, Eduardo Grosclaude > wrote: >> Hello, >> Can somebody recommend CentOS-OK, dual socket motherboards for compute >> elements? A quick look up at Intel pages suggests they are thinking of >> them as "server boards", but then they recommend them as "for SMB", >> I'm somewhat puzzled about it. >> It would be nice to know what MBs you are using, pros and cons. >> Thank you in advance > > > Hello! > > We need more details... what's your budget, what processor are you looking at? I'm targeting E5520. I'll buy in Argentina, with a high stack of all sort of costs threw upon the product, so budget may not mean much to foreigners. > SMB just means Small / Medium Business ... as opposed to a huge > enterprise server that might have four or eight sockets... Yes, my point is, judging from Intel's own recommended applications, there seems to be no HPC market for servers... So I'm looking for hints as to which is the proper process for selecting an HPC MB... > Name a vendor, I've probably had some sort of trouble with them... of > the "Big Names", Intel is probably the least troublesome. I just > returned a bad Tyan board, and late last year returned two Supermicro > servers that were shipped with out of date hardware (not supporting > 5400 series CPU). I have an Asus board that runs Linux and > Opensolaris just fine, but will not allow any version of Windows to > install. > > I hope this is some help to you. Thank you very much for your responses, Gordon and Robert -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Motherboards for HPC applications
Hello, Can somebody recommend CentOS-OK, dual socket motherboards for compute elements? A quick look up at Intel pages suggests they are thinking of them as "server boards", but then they recommend them as "for SMB", I'm somewhat puzzled about it. It would be nice to know what MBs you are using, pros and cons. Thank you in advance -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] processor affinity
On Wed, Feb 17, 2010 at 2:07 PM, Adam Grossman wrote: > Hello, > > i am running CentOS 5.4. i have a requirement where i need to have 1 > application have a single processor all to its self, and the rest of the > system run on the other processors. "taskman" lets me bind the process > to a processor(s), but it does not make it exclusive. Is this possible > to do? i have even tried mucking around with the rc.sysinit, but to no > avail. > I assume you taskset, isn't it? If affinity is inherited, does setting affinity for init process to a fixed set of processors make sense? -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Setup multiple bridges for use with KVM
On Sat, Jan 9, 2010 at 11:15 PM, Jacob Hydeman wrote: > Running CentOS 5.4 x64. > > Have successfully bridged eth2 with br2 by following the instructions here: > http://wiki.libvirt.org/page/Networking (under the RHEL section) > > Have been running several KVM VMs successfully via this bridge. > > I am now trying to bridge additional interfaces by using the same routine. > Each bridge is named to correspond with the ethX device its bridged with. > > Example of ifcfg-eth0 script: > DEVICE=eth0 > HWADDR=00:16:76:D6:C9:45 > ONBOOT=yes > BRIDGE=br0 > > then of ifcfg-br0 script: > DEVICE=br0 > TYPE=Bridge > BOOTPROTO=dhcp > ONBOOT=yes > DELAY=0 > > This is repeated 3 times for eth0-eth2 and br0-br2. > > I've read somewhere that STP needs to be enabled when using multiple > bridges. I've tried adding STP=on to the ifcfg-brX scripts but with the same > result. Yes, brctl shows that STP is on. > > The original bridge eth2-br2 continues to work but I can't get any traffic > across any other bridge. Either by dhcp or static ips. > > Is multiple bridges a possibility? > > Previous to moving to KVM I was running Xen Server on the same hardware. I > am just trying to recreate the network setup I had. I believe Xen Server > runs on top of a linux platform so such a thing should be possible. I am curious as to what exactly is your topology and which is its intended use. I have found no issues wrt STP but you seemingly need to assign different vlans to your VM interfaces, depending on which bridge they are attached to (i.e. roughly 1 bridge = 1 vlan). I am confused about what interfaces are attached to which bridge in your setup, would like to see the scripts you are using to start your VMs... Thank you in advance -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Mic not working with skype
On Fri, Dec 4, 2009 at 4:14 PM, Andrew wrote: > > >> Also, do the test with a mixer open (aumix etc) and see if the bars >> are moving. igain is especially important, it should not be 0 when you >> talk. > > Thanks, but how do I open the mixer to see the bars? There doesn't seem > to be any such function in the beta version of skype which I'm using > (which by the way worked absolutely fine with CentOS 5.0). Launch a text console and try 'alsamixer'. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Latency Monitor
On Wed, Dec 2, 2009 at 6:41 PM, Matt wrote: > Does anyone know of a utillity I can run on a server to periodically > ping several hosts and record the result? Does not need to be > anything fancy at all. > > Matt MRTG does it nicely if you provide an adequate ping script. It *is* somewhat fancy indeed, but I think it is the simplest among the fancy. Install by simply yumming it in. Less fancy, but also simple: moSSHe (http://www.wyae.de). Both of them will let you record not only ping results, but any imaginable statistics as well. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CERN using RHEL/CentOS?
On Tue, Nov 24, 2009 at 5:01 AM, Timo Schoeler wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > Hi list, > > I just did my daily news scan and saw some screenshots that illustrate > the press release [0] announcing the first collisions at the LHC. Those > screenshots show windows and buttons that exactly match my CentOS GNOME > Desktop [1]. AFAIK, SuSE/Novell has different skins, as has > (Open)Solaris and AIX, for instance. > > So, has there anybody more information on this? Would make a nice > success story for CentOS! Probably Scientific Linux: http://linuxsoft.cern.ch/ -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Some basic LVM questions
On Sun, Nov 8, 2009 at 4:44 PM, Monte Milanuk wrote: > M. Hamzah Khan wrote: > > With both drives in one big volume group, failure of one drive will > > (most likely) cause both the OS and data to be lost. > > > There in lies some of my confusion with this subject; correct me if I'm > wrong in my understanding here: with LVM, I can keep adding more drives > to a 'pool' and expand the size of the 'volume' that the OS sees > available to it... but if any drive in that volume fails, I'd probably > lose everything stored in that volume?!? Sounds like a somewhat risky > business to me, unless you *really* needed a storage volume that big > that you had to span multiple drives to do so. > You are right. LVM sort of factors out the disk reliability issue. That's why you should consider to allow volumes that span across disks on RAIDed-1 disks only. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Net-SNMP interfaces out of order
On Sat, Nov 7, 2009 at 9:40 PM, Bob p...@nle wrote: > Hello Centos People, > > I have a CentOS 5.3 box that had a total of 5 ethernet cards in it. It > functions to share an internet connection with 4 different subnets. All > works fine, except I'm noticing that my MRTG traffic graphs are wrong. > Further digging with snmpwalk reveal that the order of the ethernet > interfaces changes every time the machine is rebooted to a different order. > > For example, I currently see: > > IF-MIB::ifDescr.1 = STRING: lo > IF-MIB::ifDescr.2 = STRING: eth3 > IF-MIB::ifDescr.3 = STRING: eth4 > IF-MIB::ifDescr.4 = STRING: eth0 > IF-MIB::ifDescr.5 = STRING: eth1 > IF-MIB::ifDescr.6 = STRING: eth2 > IF-MIB::ifDescr.7 = STRING: sit0 > > Why is this not in proper order? Other servers seem to be ok. my > snmpd.conf file has little, if anything as far as config. Is there > something I need to put in there for persistence? > > I have found that relying on snmp numbers for interfaces is always tricky. You may be better off addressing them by 'description' as in Target[mytarget]: \ppp0:pub...@localhost in your mrtg.cfg. Check http://oss.oetiker.ch/mrtg/doc/mrtg-reference.en.html for the whole story. HTH -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Bring up Networking in Single User Mode
On Wed, Oct 7, 2009 at 3:28 PM, ML wrote: > Nate, > >> ifconfig ethX IP_ADDRESS netmask NETMASK >> route add default gw IP_OF_GATEWAY > > OK, so I was correct, > > I am doing > > ifconfig eth0 172.16.254.80 netmask 255.255.255.240 > route add default gw 172.16.254.1 > > I am getting Network is unreachable. That's correct. Write down 80, 1 and 240 in binary. With a /28 mask, your IP address and your gateway are in different subnets. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] trying to understand OSS, GPL, BSD & other licensing model for software distribution.
On Wed, Oct 7, 2009 at 5:01 AM, Rudi Ahlers wrote: > What I don't yet fully understand, is how do we license both versions > of the same script, so that if a community member writes an addon for > the free one, that other community members can benefit from it as > well? And more specific, is it possible to "force" them to > redistribute their code via our community network? Just ask nicely, and they will come --if you run a usable and attractive site or community network able to grow into the best free market for all things 'your product'. > I see this a lot, for example with Joomla - which is free and anyone > can contribute extra addons, whether free or commercial back into the > community. > > But they don't have a commercial version of the same project. So I > want to know how do I license the commercial scripts with this in > mind? i.e. if I license them as GPL, do I need to disclose the source > code? Cause we're going to encrypt the additional commercial code of > the software. I would like to point out that Yes, if you release GPL code you have to disclose the source *to those people you redistribute it to* (see for instance http://www.gnu.org/licenses/quick-guide-gplv3.html, or read the fine print in GPL). You are not compelled to make your sources universally visible or return them to any source code pool or distribution, in the same sense that you are not forced to publish code you develop for inhouse use. If you charge money for your GPL product, your customers may, however, disclose the source to the public --but they may very well not feel like it, as they have already paid for that code! Consider a business model of having a free, core trunk of code, and separately selling (under any compatible license) custom code to go along with it. This custom code implements some different behaviour which only makes sense to a given customer or a vertical market. Every new code you release under this model (because of licensing compatibility with the core trunk) has to be released with its source. But this means some acquisition cost, and a business advantage, to your customer. He will want to keep it for himself --he won't disclose it. And you can continue with your selling it as if in a closed source model. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Microphone not working with Skype (Was: Testing and using a microphone)
On Sat, Oct 3, 2009 at 4:48 PM, Lanny Marcus wrote: > On 10/3/09, Niki Kovacs wrote: > > One trouble, though. I can't seem to get the microphone to work with > > Skype. Since there seem to be no more RPMS for RHEL, I downloaded and > > installed the static version. I can hear the sound of the test voice, > > but I can't record a message on the audio test interface. > FWIW, My mic works OK during a Skype conversation, however I am unable to replay myself with the audio test interface. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Monitoring OpenVPN TUNs with MRTG
I want to check some client OpenVPN TUN interfaces with MRTG running at my VPN server, so I have to specify their OID interface numbers in mrtg.cfg. The problem is, these numbers are dynamic, as they may change whenever OpenVPN restarts for any reason... so, how can I write stanzas such as Target[somehostvpninterface] : ifInOctets.X&ifOutOctets.X:public@ without wiring up the X interface number into cfg file? Or, is there any method to keep X from changing at the clients? Any hints appreciated! -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] program to hide X11 windows
On Fri, Sep 18, 2009 at 10:05 AM, Jerry Geis wrote: > > > > Don't know if that's what you're looking for, but when you edit a > > presentation with Impress, press F5 to show only the presentation. > > > > Cheers, > > > > Niki Kovacs > > > Niki, > > no-one is there to press F5. Its a controlled display. > Thanks for the suggestion though. > "openoffice.org -h" tells you some options to run OpenOffice. Perhaps you can add "-show" to get OO to automatically display the presentation. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Cacti Installation on CentOS 5
On Wed, Sep 2, 2009 at 7:51 AM, Gabriel - IP Guys wrote: > Dear All, > > > > I am attempting to install cacti on CentOS 5.3 64 bit, and I checked the > wiki, only to find that the instructions are a bit out of date. Have these > instructions been updated somewhere, or does anyone have updated > instructions, maybe with known gotchas etc? I've had luck with http://linux.com/learn/tutorials/38270-installing-cacti-on-centos-5 -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to tell if I've been hacked?
On Wed, Aug 19, 2009 at 1:57 AM, Bill Campbell wrote: > You cannot trust tools like ``ps'', ``find'', ``netstat'', and > ``lsof'' as these are frequently replaced by ones that are > modified to hide the cracker's work. As a corollary, the only safe way to audit a suspected system is booting your diagnostic tool from known good media (eg try a security Live CD distro) -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] help - batch account creation
On Mon, Aug 3, 2009 at 3:04 PM, David Leon wrote: > Hello guys > > I have a new Centos 5.3 running, and I have a text file with a bunch > of accounts (more than 100) that I should create > . > File format is like this > > user1 pasword1 > user2 passwrd2 > > > How can I do this task easier than creating user one by one by hand? > Need some help for building an script to achieve this task Your script may loop over your file using useradd to create users like this: while true do read username passwd if [ "$username" == "" ] then exit fi useradd $username done Feed the file into the script as std input, like "./script < file". As for setting their passwords, the chpasswd command may be what you need. Chpasswd likes ":" between username and password, while you have spaces in your file. So edit the file and remember to set IFS=: at the beginning of your script. I usually don't trust enough my own scripting skills. So I'm reluctant to make a script that may radically change the state of my system's user base. You may feel more comfortable making a script which simply builds up and outputs the proper commands, gather this output into a file, give it a good look and only then execute these commands. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Simple resource manager?
I need to serialize computing job requests for two different multicore machines, and in some near future, for a cluster. I have worked with SGE but it requires NFS and other administrative steps, plus it seems a bit overkill for my needs. I guess some simpler queue managing engine may have been developed, possibly over SSH. Any pointers? TIA. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Setting up Linux File Servers in a University Environment
On Thu, Jul 23, 2009 at 10:05 PM, Ross Walker wrote: > On Jul 23, 2009, at 8:33 PM, Clint Dilks > wrote: > >> Hello Everyone >> >> I work for a University Department that has a high number of Linux >> Desktop Users. Currently we provide a users home directory via NFS >> from >> a file server. Generally it works well for us, but I have been >> asked to >> look at our options for expanding the storage we have available. >> >> So I thought one of the first things I had better do is consider are >> there alternatives to the way we do things now that could be better >> for us. >> >> My initial research suggests that the only real alternative to NFS in >> this context is ISCSI or perhaps the combination of ISCSI and GFS. >> >> So I was wondering has anyone on this list in a similar field >> implement >> ISCSI for home directories instead of NFS? And if so would you be >> able >> to give me some idea of the costs/ benefits of doing this? > > ISCSI isn't really suited for this. You would use iSCSI to provide > storage to your NFS servers probably from a large storage box like an > EMC, 3PAR or such. > > You could make your own massive storage server and present the storage > in parts via iSCSI to different NFS servers serving different parts of > campus. Some time ago I was toying with the idea of having a number of hosts exporting network block devices to a server where I would coalesce them by means of LVM, then exporting the filesystem on one logical volume with NFS. Is this too crazy a setup? I understand reliability drops because of too many critical points of failure, but I would expect (though not know for sure) gnbd should come with some form of redundancy. Could this work as a cheap, scalable, poor man's solution? -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Replicate desktop configuration for other users using /etc/skel
On Fri, Jul 3, 2009 at 2:43 PM, Niki Kovacs wrote: > Hi, > > The subject says it all. I'd like to copy my own custom desktop > configuration for other users on the machine without having to go > manually through the hassle. > > Here's a non-exhaustive list of what I usually tweak : > > * Theme + icons > * background image > * panel > * screensaver > * Nautilus behaviour > * Handling of removable devices > * Gnome Terminal > * Gnome Dictionary (french servers) > * GEdit options > > And so on... > > I used to do this before, a few years ago, when I was a Slackware user, > but only with KDE (or XFCE on older hardware). Usually it boiled down to > copy the relevant hidden directory trees (.kde/ or .config) to /etc/skel > before creating new users. > > Would something similar work with GNOME? And if so, what are the > relevant hidden configuration directories to copy over? You could create a new dummy user, customize her desktop as you wish and then look for the dot-g* hidden directories in her home. Directories called .gconf, .gnome, .gnome2, .gnome2_private and such are candidates. Some apps will use .local or .config also. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Automounter (?) failing in CentOS 5.3
On Tue, Jun 9, 2009 at 7:34 PM, MHR wrote: > On Tue, Jun 9, 2009 at 3:03 PM, MHR wrote: > > All of a sudden, I am not getting flash drives automatically mounted > > in CentOS 5.3 with GNOME - they are recognized by the hardware, but > > there seems to be a (new?) problem with the maps. Here's the tail end > > of dmesg: > > > PS: I tried /etc/rc.d/init.d/autofs restart and that didn't help I am having the same problem since months ago. I have lived with it by pulling the thing off, then replugging it in. Also, rmmodding usb-storage and then modprobing it in again seems to work. Never had the time to work it out for good. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Yum-complete-transaction wants to wipe my system out
After some enabling/disabling new repos (pgdg for PostgreSQL specifically) and admittedly some yum action that may have gone uncompleted, I am advised to run yum-complete-transaction. However, when I attempt to do this, yum warns that 225 packages will be erased, all of which I deeply care for. How can I safely back out of this situation? Thank you in advance -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] X Windows has quit working
On Sun, May 17, 2009 at 12:40 PM, Thomas Dukes wrote: > Hello, > > Not sure when it stopped working as I don't use it often. Maybe since the > upgrade from 5.2 to 5.3. Can't say for sure as it's been a while since > tried to start X. > > The errors I receive when startin X are: > > (EE) I810(0): unknown reason for exception > (EE) I810(0): cannot continue > (EE) I810(0): VBE initialization failed > (EE) Screen(s) found but none have a usable configuration > > Fatal server error: > No screens found > > I have tried 'system-configure-display' but it fails as well. Have you tried 'system-configure-display --reconfig'? ...and the thing is called 'X Window', please... :D -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] need trouble ticket system
On Sun, Mar 29, 2009 at 3:45 AM, Dhaval Thakar wrote: > Hi, > > I need to implement trouble tracking system, GLPI may be worth a look -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] gcc 4.1 and OpenMP?
>Is CentOS default compiler >OpenMP ready? Does this mean I don't have to compile my own compiler? AFAIK it is, I haven't had to do anything but link with the proper libraries to use OpenMP -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Need a little card file database app
On Fri, Dec 5, 2008 at 3:57 PM, Robert Moskowitz <[EMAIL PROTECTED]> wrote: > I have gobs of notes of tips I have learned here and elsewhere. many > of them are in text files, some are in Freemind. > So anyone wish to share their favorite tidbit recording tool? Zim -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] linux rescue - complete list of utilities and commands?
On Thu, Nov 13, 2008 at 3:14 PM, Lanny Marcus <[EMAIL PROTECTED]>wrote: > On Wed, Nov 12, 2008 at 10:43 AM, Phil Schaffner > <[EMAIL PROTECTED]> wrote: > > Lanny Marcus wrote: > > >> Question: Is there a complete list somewhere, of which System > >> Utilities and Commands are available, if one boots into "linux > >> rescue"? > > > > If rescue mode manages to mount your installed system on /mnt/sysimage it > > automatically adds elements to the path including > > > /mnt/sysimage/bin:/mnt/sysimage/usr/bin:/mnt/sysimage/usr/sbin:/mnt/sysimage/sbin:/mnt/sysimage/usr/X11R6/bin, > > so it depends on what you have installed. > > > > Typing at the command prompt after skipping the mounting or > > removing the /mnt/sysimage elements of the PATH variable (e.g. > > PATH=/bin:/usr/bin:/sbin:/usr/sbin) shows 438 available commands for the > 5.2 > > DVD booted in rescue mode. Won't try to include them all here. > > Thanks Phil. 421 on this box. Nice to know! > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > All of the LVM commands are hidden into "lvm" command shell, too. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 5.2 on P5N64
On Fri, Nov 14, 2008 at 10:04 AM, "J.A. Magallón" <[EMAIL PROTECTED]>wrote: > Hi all... > > First of all, I'm new to this list. Thanks in advance for the help I surely > will get here ;) > > I have installed a CentOS 5.2 64 bit on a computer, and I can't get it to > boot. > The box is a custom built computer, with this components: > > - ASUS P5N64 WS Pro motherboard (nForce 790i Ultra SLI) > More details here: > http://www.asus.com/products.aspx?l1=3&l2=11&l3=653&l4=0&model=2182&modelmenu=1 > - Intel Core Quad Q9450 > - GeForce GTX 260 > - 2x2Gb of 1333 memory > - SATA 500Gb hd and SATA DVD (sata ports 1 and 2). > > I booted with the DVD and installed the system fine, but when I try to > boot from the HD, the boot process just stops after inird loading, the > kernel > doesn't even start. > > I also tried with the CentOS 5.2 live CD, but it stops claiming that can > not > find the boot disk ??? > > Has someone similar problems ? What could I try to boot ? I have had the same problems with a similar machine recently. The kernel coming with CentOS 5.1 worked, however no further update ever did. Only way to make newer kernels work was to set up Compatible mode by BIOS, alas performance suffers a lot. I filed a bug at https://bugzilla.redhat.com/show_bug.cgi?id=467308, some work at upstream seems to be underway. HTH Ah, y Bienvenido! -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] atl2.ko in Centos 5
On Fri, Nov 14, 2008 at 1:29 AM, junior.listas <[EMAIL PROTECTED]>wrote: > Sorry, may i be wrong, but > > I was compiled this module for other distro, with kernel 2.6.18, from > http://people.redhat.com/csnook/atl2/, the the version is 2.0.5, Wy we use > 1.0 version?? There is some note for why the module ( 2.0 ) does not compile > under centos?? > > thanks for your attention... > I was unable to compile the module provided with the board (nor the kernel itself, by the way) under any CentOS 5 kernel choice. However, the repo I pointed to worked flawlessly for me. The binary RPMs are OK too. Did not know about the link you mentioned. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] atl2.ko in Centos 5
On Wed, Nov 12, 2008 at 1:07 PM, junior.listas <[EMAIL PROTECTED]>wrote: > Somebody already get atl2.ko compiled in centos5 ??? > > JC > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > Not exactly your question, but I managed to make it work thanks to http://repo.redhat-club.org/redhat/5/SRPMS/ HTH -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Fwd: P5GC SATA mode problem
gt; # CONFIG_LOCK_STAT is not set 3029a3051,3057 > CONFIG_CRYPTO_API=m > CONFIG_CRYPTO_ALGAPI=m > CONFIG_CRYPTO_AEAD=m > CONFIG_CRYPTO_BLKCIPHER=m > CONFIG_CRYPTO_SEQIV=m > CONFIG_CRYPTO_HASH=m > CONFIG_CRYPTO_MANAGER=m 3030a3059,3060 > CONFIG_CRYPTO_NHMAC=m > CONFIG_CRYPTO_XCBC=m 3038a3069,3072 > CONFIG_CRYPTO_ECB=m > CONFIG_CRYPTO_CBC=m > CONFIG_CRYPTO_CTR=m > CONFIG_CRYPTO_CCM=m 3054a3089 > CONFIG_CRYPTO_AUTHENC=m -- Forwarded message -- From: Eduardo Grosclaude <[EMAIL PROTECTED]> Date: Tue, Sep 23, 2008 at 9:41 PM Subject: ASUS P5GC-MX/1333+ WD SATA To: CentOS mailing list Hi, I'm puzzled by an ASUS P5GC-MX/1333 with a WD320AAJS disk. My 5.2 DVD refused to see the hard disk. As the CD happened to have a bad MD5 sum, I assumed this was due to a bad burnt image. Backed off to 5.1. Installation of 5.1 to /dev/sda went OK, then I upgraded by yum to 5.2. But, at the next boot, the new kernel can't see the disk. Only when BIOS IDE Setup is "compatible" I can boot the new kernel. However, the disk shows up as /dev/hdc and performance is noticeably slow. If I choose any other mode, nash complains that any LVM groups can't be found and panics away. I/O in general is terrible. Copying a CDROM to a file with dd renders the machine nearly unusable. The kernel provided in 5.1 can work in the BIOS IDE Setup "enhanced/SATA" and performance is really good. Hdparm when under the current kernel says 3.51 MB/s buffered speed, whereas for the older kernel it claims some 111+ MB/s. I have updated the BIOS ROM to no avail. What am I missing? Is there anything I can do except keep trying kernel updates? TIA -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] ASUS P5GC-MX/1333+ WD SATA
Hi, I'm puzzled by an ASUS P5GC-MX/1333 with a WD320AAJS disk. My 5.2 DVD refused to see the hard disk. As the CD happened to have a bad MD5 sum, I assumed this was due to a bad burnt image. Backed off to 5.1. Installation of 5.1 to /dev/sda went OK, then I upgraded by yum to 5.2. But, at the next boot, the new kernel can't see the disk. Only when BIOS IDE Setup is "compatible" I can boot the new kernel. However, the disk shows up as /dev/hdc and performance is noticeably slow. If I choose any other mode, nash complains that any LVM groups can't be found and panics away. I/O in general is terrible. Copying a CDROM to a file with dd renders the machine nearly unusable. The kernel provided in 5.1 can work in the BIOS IDE Setup "enhanced/SATA" and performance is really good. Hdparm when under the current kernel says 3.51 MB/s buffered speed, whereas for the older kernel it claims some 111+ MB/s. I have updated the BIOS ROM to no avail. What am I missing? Is there anything I can do except keep trying kernel updates? TIA -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Re: Slow Xen on CentOS 5.2?
On Tue, Aug 26, 2008 at 11:09 AM, Eduardo Grosclaude <[EMAIL PROTECTED]> wrote: > After I updated the system, Xen takes an unusable startup time. Every Guess what, Virtual Dave (http://wiki.xdroop.com/space/VMware/Server/Clock+on+CentOS) is right. Just disable cpuspeed. Thank you, Virtual Dave -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Slow Xen on CentOS 5.2?
Hello, Should Xen still work on CentOS 5.2 with 1GB RAM? On my Toshiba Satellite notebook Xen performed reasonably well as of CentOS 5.0. After I updated the system, Xen takes an unusable startup time. Every task at boot, since nash is fired, seems to take increasingly longer. I can't seem to find any references to this problem. Where should I look first? Thanks in advance -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Re: Boot from degraded sw RAID 1 SOLVED
On Wed, Aug 13, 2008 at 3:07 PM, Eduardo Grosclaude <[EMAIL PROTECTED]> wrote: > OK, this is probably long, and your answer will surely make me slap my > forehead really hard... please help me understand what goes on. Ouch! Sure /boot/grub/grub.conf still needs editing... That's why you really, really WANT both partition tables to be identical... -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Boot from degraded sw RAID 1
OK, this is probably long, and your answer will surely make me slap my forehead really hard... please help me understand what goes on. I intend to install CentOS 5.1 afresh over software RAID level 1. SATA drives are in AHCI mode. I follow basically [1] though I have made some mistakes as will be explained. AFAIK GRUB does not boot off LVM, so I: 1. Build a 100MB RAID-type partition on each disk 2. Build a second RAID-type partition taking the remaining space on each disk 3. Build a RAID 1 device over the small partitions 4. Build a second RAID 1 device over the bigger ones 5. Declare /boot as ext3 to live on the smaller RAID 1 device 6. Declare an LVM PV to live on the bigger one 7. Build a VG on the PV, then build LVs for swap, / and /data on the VG Only problem is, I numbly have failed to follow [1] in that I left Disk Druid to make partitions wherever it chooses, so now I have cross-named partitions... md0 is the bigger RAID 1 device with /dev/sda2 AND /dev/sdb1... and md1 is the smaller one with /dev/sda1 AND /dev/sdb2. Oh well, things can't get complicated on this, I tell myself. Installation goes on well, system boots. I update the system. Now I want to be able to boot from whichever disk survives an accident. If I take out sdb, system boots. If I take out sda, system refuses to work. Aha. GRUB is not installed into sdb's MBR. Reconnect sda, reboot. Prepare for GRUB device juggling as in [1]. Into GRUB console I do > find /grub/stage1 hd(0,0) hd(1,1) > device (hd0) /dev/sdb > root (hd0,1) Filesystem type is ext2fs, partition type 0xfd > setup (hd0) Checking if "/boot/grub/stage1" exists... no Checking if "/grub/stage1" exists... yes Checking if "/grub/stage2" exists... yes Checking if "/grub/e2fs_stage1_5" exists... yes Running "embed /grub/e2fs_stage1_5 (hd0)"... 15 sectors are embedded. succeeded Running "install /grub/stage1 (hd0) (hd0)1+15 p (hd0,1)/grub/stage2 /grub/grub .conf"... succeeded Done. > quit The rationale for this being that, when the faulty disk is removed at boot, the remaining one (currently /dev/sdb) will be addressed as /dev/sda (i.e. hd0 in GRUB parlance). Now I prune /dev/sda and reboot. I see: root(hd0,0) <--- interesting Filesystem type unknown, partition type 0xfd kernel /vmlinuz-2.6 ro root=/dev/VolGroup00/LogVol01 rhgb quiet Error 17: Cannot mount selected partition Press any key to continue... Not quite what I expected. I enter GRUB console at boot and repeat the above device juggling. > find /grub/stage1 hd(0,1) > root (hd0,1) > setup (hd0) > quit However, 'quit' seems to fail as grub keeps prompting me without really quitting. After a forced reboot I get the very same error message as above. I edit the GRUB configuration entry at boot (with e command) and see root (hd0,0) as the first line It should be root(hd0,1), so probably GRUB did not write down my modifications. I edit it to read so (e command again), and then boot (b command). Now it works. I rebuild the arrays succesfully. However, I have made a one-time edit and the problem is still there. I understand the error message from the booting process was reasonable: hd(0,0) carries an unknown filesystem -- an LVM device. [1] was right, you definitely want to have exact disk duplicates to keep your life simple. However, I can't see why it shouldn't work the way it is. I can probably rebuild the secondary disk to mimic the primary's partition numbering and "fix" my problem... But, Am I right about the GRUB console commands I was issuing? How can I make them permanent then? I KNOW I did 'quit' from the grub console the first time, when from inside bash, when the system was running. What am I missing? Thank you in advance [1] http://lists.us.dell.com/pipermail/linux-poweredge/2003-July/008898.html -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS5 running very slowly on a core 2 duo with 4 GB RAM
On 8/7/08, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > > > Hi, I've installed CentOS5.2 on an INTEL Core 2 Duo (Intel(R) Core(TM)2 Duo > CPU E6550 @ 2.33GHz), 4 GB RAM (MemTotal: 4072176 kB) and my > system gets sevarel minutes to startup, specially on udev daemon. Once the > system is UP, every command I run gets 100% CPU and every is very slowly at > the point yum –y update never ends. The system installed by default this > kernel 2.6.18-53.el5PAE. I would like to know what's wrong with my server. > Do I have to install another kernel? Can you help me? Does disabling Hyperthreading (at BIOS setup control program) help? -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: Duplicate PV on HW RAID?
On Tue, Jul 29, 2008 at 1:23 PM, Lanny Marcus <[EMAIL PROTECTED]>wrote: > Eduardo: To give you something else to consider, as an alternative: I > believe there was a long thread here, awhile back, about using > Software RAID, instead of fake RAID controllers. Software RAID works > very well, as I recall from reading that thread. Possibly look into > changing to Software RAID. Depends on the HW RAID controller. Yes, I finally ended up installing software RAID because 1) I have read that, even if I installed the proper driver, Linux only uses it to configure its own dm software RAID device according to the BIOS conf-- is this completely true? If yes, no real offloading anything to hardware anyway-- even under Windows; does anybody know about this for sure? 2) I am very scared by non-kernel-tree-blessed modules which have their own install procedures and/or updating schedule, I have been bitten by this in the past. I finally did setup two 1-RAIDed identical partitions and installed the system on the rest of both disks... Now my system won't boot if one disk is broken, but I hope I can go rescue into the data. I was formerly hoping to rely on RAID to protect the full install and simplify my life, but I was discouraged away by 1) and 2). I have yet to see a real RAID controller... At what price do they start off? -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Re: Duplicate PV on HW RAID?
On Mon, Jul 28, 2008 at 6:15 PM, Scott Silva <[EMAIL PROTECTED]> wrote: > The machine BIOS correctly describes the RAID volume at start. Doesn't It >> smell like fake RAID? >> Should I declare sdb invalid to the firmware program so as to force >> resync? >> Thanks again >> -- >> > It sure looks as if it was originally a mirrored set, but broke later, > maybe a kernel update no longer supports that fakeraid controller. Indeed. A reboot later, everything was a mess. I rebuilt the RAID and repeated the install. Found that Disk Druid correctly sees the only device (referred to as /mapper/isw_[10 seemingly hex digits]_Volume0, everything goes completely as expected. However, at the next boot the installed kernel no longer believes there's a single device there, and goes like this: No RAID sets and with names 'isw_[same digits]_Volume0' failed to stat() /dev/mapper/isw_[same digits]_Volume0 ...EXT3-fs errors... ...mounts failed Kernel panic My fault was not installing the proper Intel RAID driver for RHEL... the regular kernel does not provide it. Thanks very much for your help -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Duplicate PV on HW RAID?
On Mon, Jul 28, 2008 at 3:36 PM, Toby Bluhm <[EMAIL PROTECTED]>wrote: > Eduardo Grosclaude wrote: > >> >> Ross, Nate, Tony, thanks for your promptly response >> > > Toby Ouch! Excuse me plz If it were me & I was just starting out on a new setup, I'd blow it all away > and start from scratch. I hate that nagging feeling something's gonna bite > me later down the road. Agreed, I just expected to get a bit more knowledge from this crappy situation Cheers -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Duplicate PV on HW RAID?
Ross, Nate, Tony, thanks for your promptly response On Mon, Jul 28, 2008 at 2:51 PM, nate <[EMAIL PROTECTED]> wrote: > Eduardo Grosclaude wrote: > > > 4) Rebooted the installed system. Now "Duplicate PV" shows at boot. > Honestly > > To me it sounds likely that the raid controller is shitty and > is presenting two sets of devices to the OS, one likely being > the "RAID" device and the other a more generic device(s). > > What does 'dmesg' say? Do you see more devices than you think > you should have on the system? dmesg says nothing about this, the message only appears at console when booting or otherwise using the PVs: [EMAIL PROTECTED] ~]# pvs Found duplicate PV 8D7K2wg15HqD0l9HxZCz7QlDfpqJOhXT: using /dev/sdb2 not /dev/sda2 PV VG Fmt Attr PSize PFree /dev/sdb2 VolGroup00 lvm2 a- 465,62G0 [EMAIL PROTECTED] ~]# lvs Found duplicate PV 8D7K2wg15HqD0l9HxZCz7QlDfpqJOhXT: using /dev/sdb2 not /dev/sda2 LV VG Attr LSize Origin Snap% Move Log Copy% LogVol00 VolGroup00 -wi-ao 150,00G LogVol01 VolGroup00 -wi-ao 1,94G LogVol02 VolGroup00 -wi-ao 313,69G [EMAIL PROTECTED] ~]# sfdisk -d # tabla de particiones de /dev/sda unit: sectors /dev/sda1 : start= 63, size= 208782, Id=83, bootable /dev/sda2 : start= 208845, size=976543155, Id=8e /dev/sda3 : start=0, size=0, Id= 0 /dev/sda4 : start=0, size=0, Id= 0 # tabla de particiones de /dev/sdb unit: sectors /dev/sdb1 : start= 63, size= 208782, Id=83, bootable /dev/sdb2 : start= 208845, size=976543155, Id=8e /dev/sdb3 : start=0, size=0, Id= 0 /dev/sdb4 : start=0, size=0, Id= 0 Awful--I expected to see just one device :P > There might be a disk from an old RAID1 set in there. Don't think so, this machine was integrated here with new materials. Oops... system-config-lvm shows under 'Uninitialized entities': /dev/sda -> part 1 -> part 2 -> unpartitioned space /dev/sdb -> part 1 -> unpartitioned space These shouldn't be appearing as two discs in the first place-- but anaconda said I only had one unit... Anyway, why the asymmetry? Did I screw the RAID volume somehow? Or did I install plain on sda and this RAID never worked as such? :P The machine BIOS correctly describes the RAID volume at start. Doesn't It smell like fake RAID? Should I declare sdb invalid to the firmware program so as to force resync? Thanks again -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Duplicate PV on HW RAID?
Hello, My "hardware" (?) RAID system seems to work but says "duplicate PV" while booting, I don't think I was reading them before. Any clues will be appreciated. >From what I recall: 1) RAID 1 was setup (using firmware setup program) on a machine with Intel S3200 SHV Server Board. 2) Installed Centos 5.1, default LVM style. Anaconda saw a single 500GB disk so I assumed this was a true hardware RAID system. Am I wrong here? 3) Then wanted to reduce LogVol00 so as to make room for a new, data only filesystem on its own LV. Started by booting with rescue CD, lvscanned the disk, lvchanged -a y. Intended to resize root filesystem with resize2fs. Was asked to fsck, which I did (by the way, getting many errors). Fixed them all (fingers crossed), fsck again said ok. Then resize2fs worked happily. 4) Rebooted the installed system. Now "Duplicate PV" shows at boot. Honestly I don't know whether this was being displayed before (this is an inherited server). This message shows at the screen but no record of it is kept on any log file. 5) Everything seems to work well anyway. I created a new LV as I wished, just this message keeps me thinking... Should I care? Should I fix it? Is it a true RAID board? Should I be better off going software-RAID 1? lspci says 00:00.0 Host bridge: Intel Corporation Server DRAM Controller 00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02) 00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02) 00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 02) 00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02) 00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02) 00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 02) 00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02) 00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02) 00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02) 00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92) 00:1f.0 ISA bridge: Intel Corporation 82801IR (ICH9R) LPC Interface Controller (rev 02) 00:1f.2 RAID bus controller: Intel Corporation 82801 SATA RAID Controller (rev 02) 00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02) 02:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200e [Pilot] ServerEngines (SEP1) (rev 02) 03:01.0 Ethernet controller: Intel Corporation 82541PI Gigabit Ethernet Controller (rev 05) 03:02.0 Ethernet controller: Intel Corporation 82541GI Gigabit Ethernet Controller (rev 05) Thank you in advance -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] centos5 virtmanager problems
On 10/2/07, JC Júnior <[EMAIL PROTECTED]> wrote: > > hi all!! > > i have som experince with xen in other distros, i never used xenmanager > or interfaces do work with xen, im trying to install a centos5 guest , > but i get always the same error "virDomainCreateLinux() failed", i have > selinux disabled, no firewall, using mirror > http://centos.oi.com.br/5.0/os/i386, using a file: for disk. I had the same problem until I realized I simply had not enough RAM. Files xend.log and xend-debug.log in /var/log/xen can give you some hints. -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Power burn test
On 8/3/07, Robert Moskowitz <[EMAIL PROTECTED]> wrote: > > I need a program that will just run everything at max so I can measure > the max power used on some systems. My 'Kill a Watt' meter should show > up early next week > SO run that CPU at max, using all memory, and keeping the harddrive > spinning. 'yum install stress' maybe what you need I can jsut do pings on the lan card for it to stay awake. > > I have searched here and on the net and have come back with nothing. > > > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Debian DomU on Centos 4.4 Dom0
Hello, Can somebody point some docs on how to do this? Has anyone done it --known pitfalls? TIA -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Root fs suddenly goes r/o
Out of the blue, dmesg on my HP Proliant w/ a SCSI disk gives loads of messages like this one: EXT3-fs error (device dm-0) in start_transaction: Journal has aborted Then the root fs goes read-only, so little else can be done on the machine. LVM locks up. At restart, fs needs a reboot to recover after fsck. The host starts up ok, then I am given some more minutes before the problem reappears. This is stock CentOS 4.4, never have gotten to update it because of this very same problem. System logs say SCSI I/O error, but SMART says no problem has been found, neither does badblocks (run from a rescue CD bootup). SCSI cabling, terminator, etc has been checked. What should I investigate next? Is the disk condemned? TIA -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] clustering vs. xen
On 7/5/07, Les Mikesell <[EMAIL PROTECTED]> wrote: How does clustering relate to virtual hosts under xen? Can you make a 2 host failover cluster as the xen dom0 and have it take care of the guests or would you build 2 independent xen hosts and configure guests as failover clusters? Or is there some other approach? I have found the first approach is a nice solution to keep separation between HA infrastructure and the services proper. Guests are unaware of the particular failover mechanisms deployed on the hosts. You are not bound to keep the same distribution over HA infrastructure and services VMs, ie you deliver raw HA, your customers install whatever they like. When the HA infrastructure is invasive (as when you need to do online replication and are not able to deploy a clustered filesystem) and/or applications pervade system config files (think apps that tinker with passwd+shadow), this separation is a must. I would not break it by engaging the guests into HA business. Just my opinion --HTH -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] ip_conntrack table filling up, dropping packets
On 6/12/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: Hi, my ip_conntrack table is filling up and now my server is dropping packets. I'm running CentOS release 4.4 (Final) on a fairly busy webserver. The table is full of various connections, including a lot of "ESTABLISHED" tcp connections from my webserver (the src is my webserver ip), and some other random connections to my webserver, and many "ASSURED" connections. So why is it filling up? I changed the default timeout value like so: echo 36000 > /proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_timeout_established but I don't think that's had any effect. any thoughts? what additional info can I provide that would be helpful?I did find a script that clears out some of the stale connections using hping2, but I don't know if that's really a great solution to this problem. I have seen this in connection with some dreadful internet worm affecting Windows stations in the last hours. This particular worm seems related to DEL.EXE file modifications. :( -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
