Fw: help for pointers
hi all heres a nice query from a friend where can i find an utility which can account for bandwidth usage of each of the sites hosted on one web server with only one ip address can we help him ? http logs ?? and then he is bound to ask about controlling so ip route ? tc ? solutions ??? cherio venu
how do i NAT a legacy network ?
An interesting problem... we have a legacy network which has IPs : 95.x.x.x ( NOT REGISTERED, i.e illegal) that we can't change now !!! ( those network enginners of 1994,when the network was installed; obviously did not know about rfc1918 ) now we want to connect this network to the Internet... we cannot re-number our network... so i looked at using a linux box with NAT ...that should be straight forward ... right ? wrong ! hey this is fun !! and i am a bit confused... NAT -- for 2.0.36 and 2.2.x is available ... but it does NOT support Dynamic NAT i.e. 95.x.x.x NATed behind ONE IP (http://www.csn.tu-chemnitz.de/HyperNews/get/linux-ip-nat.html) It does support static NAT though ... it should be good to NAT our internal web server with a Legal IP (any comments ?) The new NAT code IPROUTE in the 2.3.x kernels requires iproute ... whose docs are not good enough for me(anybody care to explain ?)... and then the code is still very alpha... IP MASQ supports network NAT very wellbut the docs say that we have to use only private IPs. so .. can i use IP MASQ to hide my 95.x.x.x network also ?? I also plan to use IPCHAINS to filter the trafficthe HOWTO is clear enough... ! so what is the best solution ? ... we have been using Checkpoint FW-1 till now... and it works fine i believe i can reproduce all functionality on Linux too... what says u ? cheers venu [EMAIL PROTECTED]
Re: what are the standard programming tools available in Debian?
as for other bits of the toolbox, you need to use manpages, (perldoc has perl info, the C ones are harder to find; I don't think there is one manpage that lists all the other C-based manpages..) grep, find, and maybe other bits too. For C/C++ man pages beautifully organised ... tried gnu info ? good documentation on GCC , GLIB , GDB etc and hyperlinked !! btw: info pages for cp, ls , ln are also verrry informative !! my students (and myself) learn from them... cheers venu
script to remove blank lines ?
hi all shell scripters ! if in a file I have say 10 lines and some of them are blank lines ,how do i remove the blank lines ? cherio venu
Re: script to remove blank lines ?
hey... that was quick !! thanks stephan...
Stephan wrote:...
grep -v ^$ filename
This gets you all lines with something between the line's beginning (^)
and its end ($). Or rather without nothing between beginning and
end (-v is grep's negation option).
i did it like this uing awk.
cat m | awk '$1 != { print $1 }'
but i believe ur method would be faster !!
thanks
venu
Re: A doubt...
hi mahendra ... congrats on getting ur debian system up and going !!! I am facing is about the network. After configuring the network, machine can connect to other machines on the network but it is not allowing ok..so ur networking is working fine.. other machines to connect to itself. The error on other machines is Connection refused . I tried a lot by playing with the files looks like either the applications are not installed or not started... more details reqd. here ... do u mean that u r not able to telnet to the linux box ? or ftp or www browse ? u can check what servers are stated by the command netstat -at | less for example , my machine shows the following... _ [EMAIL PROTECTED] venu]$ netstat -at |less Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp0 0 *:telnet*:* LISTEN tcp0 0 *:ftp *:* LISTEN tcp0 0 *:800 *:* LISTEN tcp0 0 *:www *:* LISTEN __ the above shows that the telnet, ftp , www servers are in the active (LISTEN) so u can telnet into this server from another machine etc... look into the man pages of netstat for more details.. all initialization scripts are installed in /etc/init* ... ( check that out ) /etc/hosts.allow and /etc/hosts.deny. It is not working. Will you please sort out the problem for me ? another thing ... have u installed the relevant packages ? check with dselect.. or dpkg look into the man pages for dpkg.. (don't remember the command !!) By the way , one more thing. Can I configure various utilities (e.g. network) after system is installed once ? Or everytime I have to for boot/root (installation ) floppies ? sure u can configure all the utilities after installation btw: have u read the debian installation manual ? its available at http://www.debian.org/releases/stable/i386/install also tons of info is available in /usr/doc and especially /usr/doc/HOWTO Thanking you in anticipation, cherio... venu ps: so mahendra... are u from Pune Univ. Physics dept ?... then i may have met u before... are u involved with the IT syllabus etc
telnet access control
hi all !! the default config on most unices restricts root login via telnet... how is this done ? i have done it once before.. but don't remember how...is it thru inetd.conf ? and if i need to restrict number of simultaneous logins (total and for a particular user).. how do i do it ? thanks in advance venu-- What's All the Buzz About Linux? L I N U X .~. The Choice /V\ http://www.ourmanpann.com/linux/ of a GNU /( )\ Generation ^^-^^ -- borrowed this from manpann, thanks man ! [EMAIL PROTECTED] pune, india...
Re: Help me stay away from visual C++ :)
dear carl The more I think about it, the following is better. No more buffer overflow problem. have heard lots about it in security bulletins ... what is a buffer over flow ? and how does it appear in code ? cheers venu
Re: Ethernet card problems
hi manuel i had similar problems ..the solution 1. check the ethernet cable is connected properly (i have this problem 80% of the time !!) 2. make sure ..especially in the case of an ISA card, that u r using the correct IRQ and IO address... use the DOS Utility of the card to check this... as on linux... the card driver sometimes gets installed even if the irq is specified wrongly 3. if the card is a combo BNC + UTP, in some cases, the driver is not able to switch on the correct interface.. so this may be fixed using the Ethernet card DOS utility to specify the same eth0: EtherExpress 16 at 0x300 (IRQ 5, RJ45 connector, 16-bit bus, 32k RAM) eth0: TDR reports transceiver problem from this .. the problem may probably be option 2 above... check it out ! let me know how it works out.. cherio venu Hi there, I have an Intel Ether Express 16 ISA card and I'm trying to get it to work with linux. Linux seems to detect the card ok, but after detection on boot up I get the message: eth0: TDR reports transceiver problem The dos diagnostics program for the card indicates that everything is OK, and it seems to work fine with Windows 98I have included my boot message,...followed by the result of ifconfig... Any help is appreciated, Thanx, Manuel -- Memory: sized by int13 088h Console: 16 point font, 400 scans Console: colour VGA+ 80x25, 1 virtual console (max 63) pcibios_init : BIOS32 Service Directory structure at 0x000fad40 pcibios_init : BIOS32 Service Directory entry at 0xfb1c0 pcibios_init : PCI BIOS revision 2.10 entry at 0xfb1f0 Probing PCI hardware. Calibrating delay loop.. ok - 53.25 BogoMIPS Memory: 30216k/32768k available (1136k kernel code, 384k reserved, 1032k data) Swansea University Computer Society NET3.035 for Linux 2.0 NET3: Unix domain sockets 0.13 for Linux NET3.035. Swansea University Computer Society TCP/IP for NET3.034 IP Protocols: IGMP, ICMP, UDP, TCP VFS: Diskquotas version dquot_5.6.0 initialized Checking 386/387 coupling... Ok, fpu using exception 16 error reporting. Checking 'hlt' instruction... Ok. Intel Pentium with F0 0F bug - workaround enabled. alias mapping IDT readonly ... ... done Linux version 2.0.36 ([EMAIL PROTECTED]) (gcc version 2.7.2.3) #2 Sun Feb 21 15:55:27 EST 1999 Starting kswapd v 1.4.2.2 Real Time Clock Driver v1.09 tpqic02: Runtime config, $Revision: 0.4.1.5 $, $Date: 1994/10/29 02:46:13 $ tpqic02: DMA buffers: 20 blocks, at address 0x282600 (0x28254c) Ramdisk driver initialized : 16 ramdisks of 4096K size loop: registered device at major 7 ide: i82371 PIIX (Triton) on PCI bus 0 function 57 ide0: BM-DMA at 0xf000-0xf007 ide1: BM-DMA at 0xf008-0xf00f hdc: IBM-DAQA-32160, 2067MB w/96kB Cache, CHS=4200/16/63, DMA hdd: TATUNG CD-652E, ATAPI CDROM drive ide1 at 0x170-0x177,0x376 on irq 15 Floppy drive(s): fd0 is 1.44M FDC 0 is a post-1991 82077 md driver 0.36.3 MAX_MD_DEV=4, MAX_REAL=8 Failed initialization of WD-7000 SCSI card! scsi : 0 hosts. scsi : detected total. Partition check: hdc: [PTBL] [525/128/63] hdc1 hdc2 hdc3 hdc4 hdc5 hdc6 hdc7 hdc8 VFS: Mounted root (ext2 filesystem) readonly. Adding Swap: 12060k swap-space (priority -1) Adding Swap: 16092k swap-space (priority -2) Module inserted $Id: cdrom.c,v 0.8 1996/08/10 10:52:11 david Exp $ eth0: EtherExpress 16 at 0x300 (IRQ 5, RJ45 connector, 16-bit bus, 32k RAM) eth0: TDR reports transceiver problem Serial driver version 4.13 with no serial options enabled tty00 at 0x03f8 (irq = 4) is a 16550A tty01 at 0x02f8 (irq = 3) is a 16550A -- loLink encap:Local Loopback inet addr:127.0.0.1 Bcast:127.255.255.255 Mask:255.0.0.0 UP BROADCAST LOOPBACK RUNNING MTU:3584 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 Collisions:0 eth0 Link encap:Ethernet HWaddr 00:AA:00:3C:20:89 inet addr:192.168.0.20 Bcast:192.168.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:6 dropped:0 overruns:0 carrier:6 Collisions:0 Interrupt:5 Base address:0x300 -- Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] /dev/null
Re: Repeat Borne Shell Tutorial URL
hi monte heres a compilation __ I haven't come accross a good complete shell programming tutorial, but I learned some tricks from Intermediate Bourne Shell Programming (http://consult.cern.ch/writeups/bournint/); the C shell isn't really suited for most script jobs for reasons discussed in http://language.perl.com/versus/csh.whynot HTH, Ray -- I've found this site to be particularly helpful: http://www.mcsr.olemiss.edu/unixhelp/ My favorite reference for bash is http://www.gnu.org/manual/bash/ ksb __ cheers venu A few day ago someone submitted a request for tutorial URL's concerning the Borne shell. I have accidentaly deleted the re:'s and I've searched the debian email archive for it, but no luck. Could some send me the URL. The tutorial was a .ps document that looked like a good read for a newbie like myself trying to learn a little shell script programming. Thank you, -- Monte Copeland
Re: tcp ip need information
hi... On 10-Jun-99 matthew lamb wrote: i would like to know more about the low level end of tcp ip and how the packets are handeled and formated on the transmission medium if you can point me in the right direction i would be grateful. Try the books by W. Richard Stevens. He is one of the key authors on the subject. And of course, the kernel source. there is a TCP/IP Tutorial RFC... its one of the earliest docs on the subject and very good ! describes the protocol etc... search yahoo for the same... or can somebody give the right number ? cheers venu -- Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] /dev/null
Re: tcp ip need information
dear matthew... i would like to know more about the low level end of tcp ip and how the packets are handeled and formated on the transmission medium if you can point me in the right direction i would be grateful. check out rfc1180 and then rfc2151 has good references ... to get them send mail to: [EMAIL PROTECTED] with no subject and this in the body RETRIEVE: RFC Doc-ID: RFC = 4 digit rfc number more details in rfc2151 cheers venu
Re: CD images
dear newton ? I'm having a problem with the CD images at http://sunsite.doc.ic.ac.uk/packages/Linux/debian-cd/2.1r_0/i386. I have free internet access at work so I thought I'd download the images and write them to CD myself. Because of the way the network is set up I can only use IE or Netscape to get the images. Using Netscape both the binary images are it is always better to get the images using a ftp program...or thru rsync.. but if u have only http access... (may be thru a proxy ?) then use some program like getright which supports proxies or wget ( for windows /Linux) enlarged by about 2Mb from the listed size so censequently the md5sums don't match. IE can't handle the download. The binary 2 image completed at 404Mb. What I want to know is, what's causing this 2Mb enlargement. Is it no idea here ...anybody else ? going to be a problem? What's the best way to write these images under windows? We had a go yesterday and we just got an .iso file on a cd rather than an imaged cd. I read the CD image FAQ and it's not a lot of help. 2) How do I get this windows software to write the Image files to a CD ? change the file extension from .raw to .iso, and your windows sorftware should be able to see it, and write it. What software do people use? hey the CD image FAQ is very clear about this to write a cd image thru windows software like Adaptec Easy CD Creator select File-- Write CD from Image -- then select the image file... and write !!! simple. i have done this many times and have had no problems.. cheers venu
Re: GNOME installation screw-up
dear matthew :c) how to get out of XDM so that I can start fixing the above two problems try Ctrl + Alt + F1 to F6 will switch to vitual consoles where u can log in... cheers venu :I downloaded the GNOME 1.0 distribution with apt, installed, put the : :exec gnome-session : :line in my .xsession file, and quit X to try out what I had done. Oops. : :I could have done the smart thing and logged out as Root before I put :any GNOME startup stuff in a .xsession, but NOOO. I was too eager for :that. Now, I can't get out of xdm at all if I try to log in as Root; if :I try to log in with one of the user accounts, Enlightenment breaks -- :possibly because they had existing .enlightenment directories from the :0.14 that came with Slink. : :I wouldn't have a problem, except that I can't figure out how to get out :of XDM and into another virtual console so that I could fix stuff (well, :maybe I'd still have a problem, but I wouldn't be completely stuck in XDM :where I can't do anything) : :So, any ideas about : :a) why X won't start as root (the account with exec gnome-session in :the .xsession file) : :b) why Enlightenment isn't working on user accounts with no GNOME startup :instructions : :or :
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