Re: [CentOS] Upgrading system from non-RAID to RAID1
> Follow-up question: Is my proposed strategy below correct: > - Make a copy of all existing directories and files on the current disk using > clonezilla. > - Install the new M.2 SSDs. > - Partitioning the new SSDs for RAID1 using an external tool. > - Doing a minimal installation of C7 and mdraid. > - If choosing three RAID partitions, one for /boot, one for /boot/efi and the > third one for the rest, do I go with the default mdraid version, ie 1.2 I > believe? > - Copying the backup above with contents of the the existing disks, ie not > just /root and /home but all other directories and files to the new disks > from the clonezilla backup. Note that the new disks will be larger. > - Change the boot sequence in the BIOS and reboot. I don't know if this is still a problem, but in the past, CentOS was only writing the boot-loader on one of the RAID-disks. If this one would fail, the OS would not boot. So you had to make sure to copy the boot-loader onto all RAID-members. Michael ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Upgrading system from non-RAID to RAID1
Hallo Simon, > Anyway, the splitting of large disks has additional advantages. Think of > what happens in case of a failure (power loss, kernel crash...). With the > disk as one large chunk, the whole disk has to be resynced on restart > while with smaller segments only those which are marked as dirty have to > be resynced. This can make a bit difference. I am not sure if this is true. If a underlying disk fails, it will mark all partitions on that disk as dirty, so you will have to resync them all after replacing or readding the disk into the array. Michael ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Looking for a RAID1 box
Robert, > I have a few hardkernels and I was the one that got Centos-arm working on > them and booting completely off the HD. > Problem comes back to it is ARM. > I have their Odroid HC4 for doing RAID, but could not get any Linux but > theirs installed. The HC4 should be running with https://www.armbian.com/odroid-hc4/, although this would be Debian based. > And as I mentioned, iRedMail does not support ARM. > So I am looking for something x64ish. the H3+, just like the complete "H" series is Intel based. The H3+ uses a "Intel(R) Pentium(R) Silver N6005" CPU. I have it running with RHEL9 Michael ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Looking for a RAID1 box
Hallo Kenneth, ... > That has 2x 2.5 Gbps ports, which would be nice for a simple home router. Is > there a 3x or 4x 1 Gbps version? I was considering a Firewalla with 4x 2.5 > Gbps ports, as I have two ISPs for redundancy. (One is 1 Gbps symmetric.) But > they're about 2.5x that price. Review: Yes Sir, there is an add-on board for the H3+, https://www.hardkernel.com/shop/h2-net-card/ that gives four extra 2.5GBps ports. -- Mit freundlichen Grüßen, Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Looking for a RAID1 box
Hi Robert, my old home server needed to much energy (~80VA) permanently, so I went for an https://www.hardkernel.com/shop/odroid-h3-plus/ The manufacturer is located in Korea and has dealers around the world. Put it in one of their cases https://www.hardkernel.com/shop/odroid-h3-case-type-1/ add two drives and you will have a system that consumes less than 20VA under load, less than 15VA idle. My new system is just doing its job, the whole thing will be below 250USD excluding drives. Michael Tuesday, January 3, 2023, 10:55:40 PM, schriebst Du: > Help? > I am looking for a box I can drop Centos or one of the spinoffs that: > Has RAID1 internal (not an external USB RAID thing) > Can be software or hardware > small (4TB/drive fine) and low power > I plan to use it ONLY for email server. perhaps iRedMail > I have spent a lot of time looking and not finding any such piece of metal. > All I find are NAS boxes with their own OS. > thanks > Bob (frustrated) > ___ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos -- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] A Blast from the past
> I changed the processor to an Ice Lake and I get the problem below when I > boot the working Haswell disk. Did you try to update your BIOS to the most recent version? Most BIOS updates add code to handle more recent CPUs. -- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] https://blog.centos.org/2020/12/future-is-centos-stream/
> A colleague of mine - the most proficient admin I personally know - already > decided to move to Oracle Linux. And I'm currently considering it as an > option. And Larry Ellison is sitting in his office laughing his ass off. Happy guy with a nice christmas gift from the RH board of directors. -- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Drive failed in 4-drive md RAID 10
Hi, > Thanks. That reminds me: If I need to replace it, is there some easy way to > figure out which drive bay is sdf? # smartctl -all /dev/sdf will give you the serial number if the drive. That will be printed on the disk label. But you still have to shut down your machine and pull all drives to find it. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] storage for mailserver
Hello Phil, Wednesday, September 16, 2020, 7:40:24 PM, you wrote: PP> You can achieve this with a hybrid RAID1 by mixing SSDs and HDDs, and PP> marking the HDD members as --write-mostly, meaning most of the reads PP> will come from the faster SSDs retaining much of the speed advantage, PP> but you have the redundancy of both SSDs and HDDs in the array. PP> Read performance is not far off native write performance of the SSD, and PP> writes mostly cached / happen in the background so are not so noticeable PP> on a mail server anyway. very interesting. Do you or anybody else have experience with this setup? Any test results to compare? I will do some testing if nobody can come up with comparisons. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] storage for mailserver
hi, I am planning to replace my old CentOS 6 mail server soon. Most details are quite obvious and do not need to be changed, but the old system was running on spinning discs and this is certainly not the best option for todays mail servers. With spinning discs, HW-RAID6 was the way to go to increase reliability and speed. Today, I get the feeling, that traditional RAID is not the best option for SSDs. I am reading that all RAID members in SSD-arrays age synchronously so that the risk of a massive failure of more than one disk is more likely than with HDDs. There are many other concerns like excessive write load compared to non-raid systems, etc. Is there any common sense what disk layout should be used these days? I have been looking for some kind of master-slave system, where the (one or many) SSD is taking all writes and reads, but the slave HDD runs in parallel as a backup system like in a RAID1 system. Is there any such system? Any thoughts? best regards Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] php 5.6 on CentOS 6
H, > I am in the process of moving various apps and data off a CentOS 6 > server to a new server running CentOS 7. As part of the migration > process I need to upgrade an app and corresponding data files which > requires php 5.6. [... ]Is this correct and what would the > recommended procedure then be since I do need 5.6 for this. Use > Remi's collection or something else? I was hoping SCL would have it > since it is well-tried and easy to sandbox on the computer. Remi has been working very nicely every time I needed to install a non-standard version. There is still a 5.6 version for CentOS 7 available. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] smb protocol version
Chris, CW> I don't have any lines in my configuration file for any of the servers, CW> how can I tell what the default protocols are? you may want to add log file = /var/log/samba/log.%m.%R to the "global" part of your smb.conf. The %R gives "the selected protocol level after protocol negotiation. It can be one of CORE, COREPLUS, LANMAN1, LANMAN2, NT1, SMB2_02, SMB2_10, SMB2_22, SMB2_24, SMB3_00, SMB3_02, SMB3_10, SMB3_11 or SMB2_FF." This will at least give you information about the actually used protocol for every client. A bit "the other way around", but it might help. Michael ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] slow performance on company production server I need help
Christopher, > [root@daisy cron.daily]# tw_cli /c8 show > Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache > AVrfy > -- > u0 RAID-5 OK - - 256K 11175.8 Ri ON > VPort Status Unit Size Type Phy Encl-Slot Model > -- > p0 OK u0 3.63 TB SATA 0 - WDC > WD4005FZBX-00K5 > p1 OK u0 3.63 TB SATA 1 - WDC > WD4005FZBX-00K5 > p2 OK u0 3.63 TB SATA 2 - WDC > WD4005FZBX-00K5 > p3 OK u0 3.63 TB SATA 3 - WDC > WD4005FZBX-00K5 you are running your RAID-controller without BBU and without write caching. (see the Ri statement) I get tw_cli /c0 show Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy -- u0RAID-6OK - - 256K16763.7 RiWON VPort Status Unit Size Type Phy Encl-SlotModel -- p0OK u0 2.73 TB SATA 0 -WDC WD30EURS-63SPKY0 p1OK u0 2.73 TB SATA 1 -WDC WD30EURS-63R8UY0 p2OK u0 2.73 TB SATA 2 -WDC WD30EURS-63SPKY0 p3OK u0 2.73 TB SATA 3 -WDC WD30EURS-63SPKY0 p4OK u0 2.73 TB SATA 4 -WDC WD30EURS-63SPKY0 p5OK u0 2.73 TB SATA 5 -WDC WD30EURS-63SPKY0 p6OK u0 2.73 TB SATA 6 -WDC WD30EURS-63SPKY0 p7OK u0 2.73 TB SATA 7 -WDC WD30EURS-63SPKY0 Name OnlineState BBUReady StatusVolt Temp Hours LastCapTest --- bbu On Yes OKOK OK 19731-Dec-2019 with the same type of controllers. When I did the initial installation, I found that the write caching makes a VERY big difference in my mailserver application. However, you might have get problems finding a matching BBU these days if your controller is not very recent. And depending on where you are located and how good your power supply is, you don't want to activate write caching without a BBU. cheers, --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] why windows 10 can't access centos samba
Thursday, September 12, 2019, 11:09:36 AM, you wrote: q> I can access centos's samba via windows 7, but fail via windows 10. Why? You might want to provide your /etc/samba/smb.conf so that we can take a look. There are so many ways to operate Samba that it is impossible to help without. best regards --- Michael ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] PHP 7.x on CentOS 7 : which solution ?
Hi, Friday, March 15, 2019, 8:51:15 AM, you wrote: NK> As you all know, CentOS 7 is shipping PHP 5.4, which is OK in some NK> situations. Unfortunately, some applications like OwnCloud require a NK> more recent version of PHP. I had the same problem a few weeks ago and decided to stick with the webtatic repository. As our typo3 instance required 7.0, I updated from php.5.6 to php.7.0 by simply "yum remove php56w ..." and "yum install php70w ...". Everything went smooth and without problem. Before I updated, I checked if all used 5.6 packages were available in the 7.0 version. I took that path because I could easily identify that all required packages were available in both versions. This might be more complicated if I would have moved from webtatic-5.6 to remy-7.0. You may also consider to crossgrade from owncloud to nextcloud :-) best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Please Recommend Affordable and Reliable Cloud Storage for 50 TB of Data
Evening, Ladies and Gentlemen, it is Mr. Turritopsis Dohrnii Teo En Ming striking again. May I remind you his most successful questions were: -- [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers? (discussion following with some 50 replies) -- [CentOS] What are the differences between systemd and non-systemd Linux distros? (discussion with 52 replies) so may be we can just stop it now... Michael > Hi, > Could you recommend affordable and reliable cloud storage for 50 TB of data? > Here are some important factors to consider: > 1. Personal/non-commercial use. > 2. Must be affordable, since I am unemployed most of the time and have > super low levels of income for the past 12 years since I graduated > from the National University of Singapore in 2007. > 3. Cloud storage provider must not be a fly-by-night company, that is, > it will not suddenly close down the next day. > Please advise. > Thank you. > ===BEGIN EMAIL SIGNATURE=== > The Gospel for all Targeted Individuals (TIs): > [The New York Times] Microwave Weapons Are Prime Suspect in Ills of > U.S. Embassy Workers > Link: > https://www.nytimes.com/2018/09/01/science/sonic-attack-cuba-microwave.html > > Singaporean Mr. Turritopsis Dohrnii Teo En Ming's Academic > Qualifications as at 14 Feb 2019 > [1] https://tdtemcerts.wordpress.com/ > [2] https://tdtemcerts.blogspot.sg/ > [3] https://www.scribd.com/user/270125049/Teo-En-Ming > ===END EMAIL SIGNATURE=== > ___ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 7 and backup solution
Sunday, January 27, 2019, 5:10:53 PM, you wrote: KP> rsync to a remote site and then BackupPC. (Use the BackupPC version 4 in KP> Software Collections.) I am using BackupPC too, but you don't need to rsync the data first. BackupPC can rsync data natively. I am using independent backup servers that are not accessible from the backup sources. Don't forget safety and integrity of your backed up data these days! Btw., it is not only a nice backup software, it is also very nice in recovering data through its web interface. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Certificates
Leo, >> I would like to obtain an ssl certificate, so I can run my own imap server >> on a machine in my office. >> I am assuming I'll need to pay a CA to generate what I need, but >> I'm confused about what I need. I am running dovecot at teh moment, >> but my clients (iphone, windows laptops) say my ssl connection is >> not trusted. The phone just won't connect. > Nope, you don't have to pay for a certificate at one of the > traditional CAs, you can use Let's Encrypt to have free but fully > valid certificates for your server. > See https://letsencrypt.org/ for more information. I can recommend > https://github.com/xenolf/lego for use on your server, but there are > many different LE clients out there. certbot works only with ports 80 or 443? Can lego work with with IMAP ports like 143 or 993? The documentation is not very clear. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?
folks, didn't anybody check the name of this guy? Turritopsis Dohrnii Teo En Ming drops a bomb with provocative questions every now and then and NEVER ever responds to his own bullshit. He is just a troll! Michael ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?
> Good evening from Singapore, > I am torn between deploying Microsoft Exchange 2016 and Linux-based > SMTP servers like sendmail, postfix, qmail and exim. > Relative ease of installation and configuration is an important > consideration factor. I think we didn't hear about some important points: How many people in your IT-department? How large is your organization? What do your users need and want? Where is your experience? The reason I am asking the third question is that exchange is certainly not only a mail system. It offers a lot of other functionality like calendar and I don't know what. For me, it was an easy decision. More than 20 years ago my organization wanted to implement a mail system. Microsoft was a t that time still in stone age and it may be that they didn't even have a server based solution available at that time. Bottom line, if you are heading for a mail server system, go for Postfix, dovecot, etc. Btw., we NEVER lost a single mail. I still have mails from 1998 :-) Both paths may be suitable, but with Linux, you are pretty safe of nasty things that do not do as you want. I know that this MS-bugs bother me a lot at my users workstations, so why should it be different at the server side. Michael Michael ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] firewalld management on a headless server
Hi, > I recently converted my employer's firewall from pure iptabes to > firewalld and looked for something similar, more along the lines of > webmin, etc. funny, my webmin installation on a banana-pi has webmin 1.831, which has support for firewalld. I am not sure, but I believe I got it directly from www.webmin.com. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Unable to edit resolv.conf
Hi, TD> I have tried nano, gedit, Webmin, system-config-network and it won't allow TD> me to make the changes. Selinux enforcing mode activated? best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Raspberry PI 3
Hi Jerry, > I downloaded the RPI3 image: > CentOS-Userland-7-armv7hl-Minimal-1603-RaspberryPi3.img.xz > how do I resize the root FS? My Sd card is 32G and I am only using 2G of > that. here is a copy of a mail I sent some weeks ago to the arm-dev list. This mail assumes that you add a SSD to the system, but the concept remains the same. Make sure that the /boot space has at least some 4GB. ---8<--- I did pretty much what you plan to do. You need to have the "/boot" partition on the SD-card and the "/" partition on your SSD. amrd> 1. dd CentOS-Userland-7-armv7hl-Minimal-1511-CubieTruck.img.xz to amrd> SD-Card correct. use another PC and connect the SD-card and you SSD. Use GParted to move your root and swap partition to the SSD. Keep the /boot partition on the SD-card. You may want to resize the /root partition to some 16-32GByte. amrd> 2. delete all Partions on SD-Card don't! keep all partition on the SD-card. Modify /boot/extlinux/extlinux.conf and change the corresponding targets. Use uuid-addresses to direct to the correct root partition on the ssd. Boot the system and check if it correctly starts from the SSD and not from the SD-disk. If it runs correctly, remove the /root and swap partition from the SD-disk. Use GParted to resize the /boot partition to use the whole SD-disk. You will need the SD-card anyway to boot the system, but there is not much R/W access to that partition except at boot time, so the speed increase is significant. I had to go through this process, because the /boot partition is too small to go through a successful kernel update. "yum update" wanted to update the kernel, it ran out of /boot-space and corrupted my system. If you need more details, I can supply more information later today. I don't have access to the system right now. ---8<--- > also I thought the RPI3 as was 64 bit. When I downloaded the > aarch64.img and tried that it did not boot. > I thought the RPI3 supported this image. perhaps not. don't know about that, because I use the banana-pro. Not sure if the 64 bit system would make much difference. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 6.7: kernel: EDAC MC0: CE row 2, channel 1, label "": (..... (Correctable Patrol Data ECC))
Tuesday, May 3, 2016, 12:15:21 PM, you wrote: DL> After update from centos 6.6 to centos 6.7 and reboot it, I have get a DL> lot of this error into /var/log/messages: >> May 3 11:27:20 s-virt kernel: EDAC MC0: CE row 2, channel 1, label >> "": (Branch=0 DRAM-Bank=2 RDWR=Read RAS=6093 CAS=896, CE Err=0x1 >> (Correctable Patrol Data ECC)) Hi Dario, I had a similar case in the past. I had a brand new server that seemed to be running fine. After a kernel update, I gor lot of error messages in /etc/messages. That particular kernel update implemented additional error messages that were related to the motherboard chipset. It appears that new boards with new chipset run fine with existing kernel. As soon as kernel updates incorporate special features of these chipsets, you might get such messages. I returned the board under warranty. The board manufacturer informed me that a memory controller was faulty. The board had the hardware error from the beginning. The new kernel only revealed an already existing problem. You may want to check first if the hardware problem comes from memory or motherboard. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Backup PC or other solution
Hello Alessandro, Wednesday, May 6, 2015, 9:21:10 PM, you wrote: I'm new with backup ops and I'm searching a good system to accomplish this work. Everybody has its favorite backup program, but why rely on only one system? I have to backup 8 servers and use three backup systems in parallel. -- BackupPC. Easy to use, nice user interface with graphical recovery of individual files. A pain to set up, basically, all errors in setup give the same error message. Reduces used space by hardlinks. Data structure is not transparent, so no recovery by browsing the storage directories. -- storeBackup. easy to use, easy to set up, but no nice user interface. Reduces used space nicely by using hardlinks. Used as second line of defence. Stores 1:1 copies of original filesystem, so easy browsing. -- tar. Used for disaster recovery. Produces large dumps. Only use it for system data, not for user data. Span all three systems on two independent backup machines. Put these backup servers into independent locations and sleep better :-) best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 7.0 and mismatched swap file
Morning Gregory, Sunday, February 15, 2015, 6:42:32 PM, you wrote: I am putting together a new mail server for [...] I am using the default xfs file system on the other partitions. Is there a way to expand the swap file? If not, then is this problem sufficiently bad enough for me to start over with a new install. I do not want to start over unless I need to. I think that on todays system, swap is just the last resort before a system crashes. If you ever run into the situation that you need the swap system, you will have to throw more memory into the machine. I wouldn't care. Btw., are you sure you want to use XFS for a mail server? I made some tests about a year ago and found that EXT4 is by the factor 10 faster compared to XFS. The tests I performed were using the maildir style postfix installation that results in many thousands files in the user directories. The only problem was that Centos was not able to format huge ext4 partitions out of the box. This was valid for C6, don't know about C7. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] UC One-time reboot into alternate kernel?
Hi, If you are using GRUB 0.97 (legacy GRUB), then this capability is provided by the default saved and fallback commands. See sections 4.3.1 and 4.3.2 in the manual: You should keep in mind that this may not save you from pressing the reset button if the system hangs at boot (as far as I understand). However, you are right that this is a mechanism to boot a fallback kernel if booting fails. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CROSS-LIST Notice: Changes in EPEL
Hi, Tuesday, November 4, 2014, 1:43:50 PM, you wrote: TL;DR: There are a large number of orphaned/unmaintained packages in EPEL across the 5, 6, and 7 trees. These packages will be removed from EPEL unless they are picked up by a packager. Packages that *depend* on an orphaned package will be removed as well to ensure repo-closure. sorry for being so ignorant. I try to figure out what impact that has on a running system. I expect that this package cannot be updated from now on, but I hope that nothing catastrophic for an existing installation happens. Is that assumption correct? best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Critical update for bash released today.
good morning, You should 'yum update' as soon as possible to resolve this issue. I installed the update on C5 and C6 machines, but I do not see any difference in the output of bash --version. Is that the expected behaviour? C5 returns ---8--- GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu) Copyright (C) 2005 Free Software Foundation, Inc. ---8--- and C6 returns ---8--- GNU bash, version 4.1.2(1)-release (x86_64-redhat-linux-gnu) Copyright (C) 2009 Free Software Foundation, Inc. ---8--- before and after the update! best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] /dev/disk/by-uuid missing
hmmm, nobody has an idea? Michael Sunday, August 17, 2014, 10:30:54 PM, I wrote: hi! I got a problem with one of my servers where the boot process fails, because it cannot find its root partition. My /boot/grub/grub.conf uses to look like ---8--- title CentOS (2.6.32-431.17.1.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-431.17.1.el6.x86_64 ro root=UUID=8ef1f6cb-5dfc-497e-83d0-8d91cbbe4939 rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD quiet SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto rd_NO_DM rd_NO_LVM KEYBOARDTYPE=pc KEYTABLE=de initrd /initramfs-2.6.32-431.17.1.el6.x86_64.img ---8-- I could get the system to boot again by just replacing the root=UUID-... part with root=/dev/sdb3 when I started looking around, I noticed that the /dev/diskby-uuid directory was not there. The by-id as well as the by-path directories were both there. I tried to create directory and the links in the directory manually, but they were gone after the next reboot. I assume that these /dev/disk/ entries are created by some process at boot time, but I have no clue how this is done nor what is wrong with my system. I checked what blkid -L says, but this seems to be OK. ---8--- device fs_type label mount pointUUID - /dev/sda1 ext4 /mnt/raid a574f30b-fa43-4e34-8498-1cb29c4c261f /dev/sdb1 ext4 /boot 01746f38-6289-4b03-8011-bfac89ed89bd /dev/sdb2 swap swap 903a51b7-393d-4df9-9b58-f06a0a80a748 /dev/sdb3 ext4 / 8ef1f6cb-5dfc-497e-83d0-8d91cbbe4939 ---8--- Any help? btw., the problem appeared when I installed a 18TB raid array. I had to compile the e2fsprogs from the most recent sources using this recipe http://blog.ronnyegner-consulting.de/2011/08/18/ext4-and-the-16-tb-limit-now-solved to install a very large ext4 file system on the raid disk. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] /dev/disk/by-uuid missing
hi! I got a problem with one of my servers where the boot process fails, because it cannot find its root partition. My /boot/grub/grub.conf uses to look like ---8--- title CentOS (2.6.32-431.17.1.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-431.17.1.el6.x86_64 ro root=UUID=8ef1f6cb-5dfc-497e-83d0-8d91cbbe4939 rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD quiet SYSFONT=latarcyrheb-sun16 rhgb crashkernel=auto rd_NO_DM rd_NO_LVM KEYBOARDTYPE=pc KEYTABLE=de initrd /initramfs-2.6.32-431.17.1.el6.x86_64.img ---8-- I could get the system to boot again by just replacing the root=UUID-... part with root=/dev/sdb3 when I started looking around, I noticed that the /dev/diskby-uuid directory was not there. The by-id as well as the by-path directories were both there. I tried to create directory and the links in the directory manually, but they were gone after the next reboot. I assume that these /dev/disk/ entries are created by some process at boot time, but I have no clue how this is done nor what is wrong with my system. I checked what blkid -L says, but this seems to be OK. ---8--- device fs_type label mount pointUUID - /dev/sda1 ext4 /mnt/raid a574f30b-fa43-4e34-8498-1cb29c4c261f /dev/sdb1 ext4 /boot 01746f38-6289-4b03-8011-bfac89ed89bd /dev/sdb2 swap swap 903a51b7-393d-4df9-9b58-f06a0a80a748 /dev/sdb3 ext4 / 8ef1f6cb-5dfc-497e-83d0-8d91cbbe4939 ---8--- Any help? btw., the problem appeared when I installed a 18TB raid array. I had to compile the e2fsprogs from the most recent sources using this recipe http://blog.ronnyegner-consulting.de/2011/08/18/ext4-and-the-16-tb-limit-now-solved to install a very large ext4 file system on the raid disk. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS-6.5 LiveDVD problem
Hi, Friday, July 4, 2014, 7:43:03 PM, you wrote: Kernel panic - Not syncing - Attempting to kill init! Pid: 1, comm: init Not tainted 2.6.32-431.el6.x86_64 # 1 related problem here, although I have this kernel panic after updating to the most recent kernel. The machine starts fine using the next older kernel version. You could try it with an older version of the live DVD. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos backup tools
Hi Fred, I know there's rsync, which may be a good solution. I also find backupPC at epel, backintime also at epel, kbackup. I am using backuppc here to backup 5 servers to a dedicated backup-machine. In parallel, I am using http://storebackup.org/ . Storebackup uses hard links to reduce space requirements. I have to say that backuppc has the nicer restore tool. best regards --- Michael ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] HDD Problem....
Morning Eddie, Saturday, April 5, 2014, 8:41:05 PM, you wrote: ...it looks like its about to do something...and then the loud click and nothing happens. just wondering. Are you aware that you may need to mount the freshly formatted drive manually? best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] HDD Problem....
Hi Eddie, Monday, April 7, 2014, 10:43:16 AM, you wrote: Yeah Michael, I've tried to use the /mount/dev/sd* and it appears to workbecause I don't get any error messages...but I still can't browse to the drive in the Nautilus file managerso something's still not right. you may try mount with no parameters to get a confirmation that the mount was successful. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How can I disable PostFix maillog ( /var/log/maillog )
Hi, Wednesday, December 18, 2013, 11:26:26 AM, you wrote: When I send many email from my server, PostFix make log file big. now my log file is 30MB .. :( so, I want to disable log reporting it. You shouldn't disable logging, you should run logrotate so that it takes care of old log files automagically. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] disk cloning ?
Sorry. It quit with the following error : no space left on device What can I do next? http://linuxmantra.com Sorry. How to make spaces ? I am sure this is some kind of ELIZA clone... best regards --- Michael ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] device in use after a reboot
Hi, So sd[ab] are two 300 GB disks, and sdc is the big storage. I think this is not so uncommon. In my experience this has to do with the initialization of PCIe controller cards. I assume you are using a RAID controller, right? I saw that with Areca RAID-controllers in the past as well with LSI-controller these days. I am using UUID for that purpose. Not really convenient, but safe. You probably don't have to change that as soon as it is running, so the strange UUID designators are no big issue. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] ECC memory errors
Monday, April 29, 2013, 1:59:44 PM, you wrote: Message from syslogd@ at Mon Apr 29 08:02:55 2013 ... server1 kernel: EDAC MC0: UE row 0, channel-a= 0 channel-b= 1 labels -: (Branch=0 DRAM-Bank=0 RDWR=Read RAS=0 CAS=0, UE Err=0x2 (Aliased Uncorrectable Non-Mirrored Demand Data ECC)) Maybe - I'm just not sure. You need to replace the memory asap; order it, and schedule a maintenance window with all your users *now*. fully agrees, however I had a situation once where these messages appeared after a Kernel update. I learned that the kernel developers added some extra error messages for my chip set with that update. Booting an older kernel made the errors go away. OTOH, if the board is already some years old, this is not very likely (and you will have to replace the memory anyway.) best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RAID 6 - opinions
hi, yeah, until a disk fails on a 40 disk array and the chassis LEDs on the backplane don't light up to indicate which disk it is and your operations monkey pulls the wrong one and crash the whole raid. that is why I put a label on every drive tray that is visible without pulling the disk. That label carries the serial number, so that the monkey can double check the disk serial before pulling it. In fact, I was the silly monkey once, so I am careful now :-) best regards --- Michael ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] replacing joe
Morning everybody, I am still using good old joe editor on my CentOS machines although it is no longer included in the CentOS repositories. Is there any comparable wordstar compatible editor that is part of the standard distribution? And no, I don't want to use Emacs. :-) best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS Server Backup Options
Hi, On Monday, March 12, 2012 you wrote: What do you guys recommend for backing up a small CentOS server in a business environment. It will have (3) 300gb drives in a raid 5 array but I don't anticipate more than about 25gb of data that needs to be backed up each night. I stumbled on http://storebackup.org/ the other day. It looks pretty good for disc-disc backup. I am using storeBackup for three years now and LOVE it. I am backing up three servers to two independent backup servers and get a new backup every four hours. storeBackup uses hard links on the target disk, so you do not need much physical space on the backup servers. A backup of a 250GB server takes less than 15 minutes. This is certainly no solution if you need an insurance against hardware failures, but it is a perfect backup to store densely older versions of the server content. Having the servers and the backup servers on RAID6 and having storeBackup makes me sleep well. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] strange cron message
Hi, environment: new Centos 6 installation out of the box. somebody has an idea what causes this error mail to be sent? ---8--- Subject: Cron root@fileserver1 /usr/local/asc/bin/ascservicemonitor 21 /dev/null Content-Type: text/plain; charset=UTF-8 Auto-Submitted: auto-generated X-Cron-Env: SHELL=/bin/sh X-Cron-Env: HOME=/root X-Cron-Env: PATH=/usr/bin:/bin X-Cron-Env: LOGNAME=root X-Cron-Env: USER=root Message-Id: 20120228122702.1f468101...@xxx.x.de Date: Tue, 28 Feb 2012 13:27:02 +0100 (CET) /bin/sh: /usr/local/asc/bin/ascservicemonitor: No such file or directory ---8--- This pops up every three minutes. There is no ascservicemonitor on that machine, I cannot find any reference to a file with this name and I cannot find a cron job that would be running every three minutes. any ideas? best regards --- Michael ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] nfs4 problem in CENTOS6
Hi, This is slightly offtopic, but I have been trying to resolve that problem for two days now without much success. It looks like this may be something that works with CENTOS5, but not with CENTOS6! I have two machines, fileserver1 and server5. fileserver1 runs on CENTOS6 (virtualized, if this is important), server5 runs on Centos5. Both are running with the most recent updates. Server5 is a machine to store backups on. Several servers, including fileserver1, are mounted with nfs4 on server5. fileserver1 has this /etc/fstab: ---8---/etc/fstab--- UUID=73254e19-895f-4190-b2e3-13a2b0bec9ce / ext4defaults1 1 UUID=ac658802-73e4-4c87-bb03-6f9af1ebc4f8 /mnt/data ext4defaults1 2 UUID=4836335a-2d66-4d12-9dec-7197dc772d77 swap swapdefaults0 0 tmpfs /dev/shmtmpfs defaults0 0 devpts /dev/ptsdevpts gid=5,mode=620 0 0 sysfs /syssysfs defaults0 0 proc/proc procdefaults0 0 /mnt /mnt dazukofs / /nfsexport/root nonebind0 0 /mnt/data /nfsexport/data nonebind0 0 ---8--- AS you can see, /mnt/data is a partition mounted below /. I am binding both partitions to /nfsexport/... and export them in /etc/exports with ---8---/etc/exports--- / server*.pamas.local(ro,secure,no_root_squash,crossmnt,fsid=0) /mnt/data server2.pamas.local(ro,secure,no_root_squash,nohide) server5.pamas.local(ro,secure,no_root_squash,nohide) ---8--- If I execute [root@server5 ~]# /etc/init.d/nfs reload I get exportfs: /mnt/data does not support NFS export exportfs: /mnt/data does not support NFS export on the console, but nothing in the log-files. On server5, I entered [root@server5 ~]# mount -t nfs4 192.168.1.202:/ /mnt/nfs/fileserver1/root successfully and [root@server5 ~]# mount -t nfs4 192.168.1.202:/mnt/data /mnt/nfs/fileserver1/data returns: mount: pinging: prog 13 vers 4 prot tcp port 2049 and hangs. ctrl-c returns me to the prompt, but /mnt/data is not mounted. The active mount /mnt/nfs/fileserver/root is working nicely, but if I cd into /mnt/nfs/fileserver/root/mnt and enter ls there, the console hangs infinetly. As I wrote, server5 also mounts other servers filesystems without problems. All working systems are CENTOS5, the one not working is CENTOS6. Any idea? best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] [HW] Do the HDD cages in rack mount chassis indicate visual/audio HDD failure?
Dear Arun, On Tuesday, October 11, 2011 you wrote: I would appreciate clarification on the following: (a) Indicate disk failure. LED lights up and/or audio alarm? (b) The failed HDD can be swapped. Don't rely on the LED going on. I mark all my hot swap disks with labels with their serial number. This label is visible from the outside without removing the HD. That way, I can double check that I remove the faulty disk. Pulling the wrong disk is the last thing you want to risk in a RAID setup. Relying on a fault LED is close to that. Also make a list of the HD serial numbers and their position within the RAID in time. Store that in a safe place. I pulled ONCE the wrong disk out of a Raid5 array. :-( You know what that means? best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS-virt] Network and IP's
Thomas, Well, is there any other (better) documentation, than the one from Redhat_Enterprise_6.0_Virtualization ? I agree. This is a very poor piece of documentation. Basically it is just a collection of descriptions of tools and parameters. It does not give any insight about various concepts and it does not help at all to choose the right solution | When playing with Cent OS 5.x Virtualization, I could have a host | with | IP:192.168.10.40 and the guests with IP's: 192.168.10.41, | 192.168.10.42... an so on. | | But now after installing Cent OS 6.0 as a host, I can't figure out how | to make my guest get the same IP's. | | My host is still 192.168.10.40, but the 1. guest i make, get an IP of | 192.168.122.x ! | I ran across the same problem. Looks like Centos is setting up a NAT network rather than a bridged network by default. It appears that the host is acting as a DHCP server for the virtualized machines. Hope this helps. -- Mit freundlichen Grüßen Michael Schumacher mailto:michael.schumac...@pamas.de ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS] Centos VPS Kernel 2.6.35.4 'string-less' IP tables
Are you a dog lover ? I like dogs too. They usually bark at strangers. Paul. PLONK see also http://en.wikipedia.org/wiki/Plonk_%28Usenet%29 best regards --- Michael ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Keyboards
Mark, On Friday, July 22, 2011 you wrote: ctrlWinDoze tall[]talltalltall ctrl Alt[ tall spacebar ] alt Win menu The result is that just trying to type, I regularly hit the thing. Does anyone have an idea how to disable this forever (if y'all don't, I'm prying the key *off*). I propose a hardware solution. Use an abundant amount of glue to disable it :-) best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 6 Server has no GUI
Dear Giles, On Monday, July 11, 2011 you wrote: So first daft question with Centos 6 (someone had to be first!) I've setup Centos 6 as a Server but as with Centos 5 it used to boot into the GUI but v6 doesn't do this, startx etc doesn't seem to work to launch the GUI perhaps:: yum groupinstall GNOME Desktop Environment There is no GNOME Desktop Environment group. Check with yum grouplist and you will see. And even installing KDE Desktop won't help, because it is not starting automatically. And then, we don't have runlevels any more, this means a little bit more looking into details is required. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 6 Server has no GUI
Josh, On Tuesday, July 12, 2011 you wrote: help, because it is not starting automatically. And then, we don't have runlevels any more, this means a little bit more looking into details is required. How can Linux _not_ have run levels. I thought that was a central part of the design of Linux? Um, who says 6 doesn't have runlevels? I haven't personally looked at C6, but upstream EL6 -does- have runlevels just as previous versions: ...my fault. I had some remarks in my mind that the boot procedure had changed from rhel5 to rhel6. Now I can't find that reference. Looks like this was nonsense from my side. Sorry, still trying so sort things with our new CENTOS6 toy... :-) best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 6 supported hardware
Mark, On Tuesday, July 5, 2011 you wrote: Has anyone seen a supported hardware list on CentOS 6? Check my question regarding the same question from May. 3rd this year with the subject list of supported hardware. There is a list of certified hardware, but no list of supported hardware. I find this strange as in my opinion the hardware support is mainly handled in the kernel. If people are writing drivers for the kernel, it would be quite simple to ask them adding the supported hardware to a list. Some two years ago I had an issue with a new motherboard. After a kernel update, it had massive memory errors in the log-files. It turned out that a new kernel driver simply added the feature of reporting errors. They were there before, but not reported. I had to wade through the kernel source code and the history-files to figure out what had happened. Not really good, but OTOH no CENTOS problem. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] SSD for Centos SWAP /tmp /var/ partition
Keith, On Friday, May 20, 2011 you wrote: I'm wondering if it would be a good idea to use a new SSD for moving all the disk i/o to, that Linux likes to do so often. Plus putting SWAP onto a decent SSD should speed things up somewhat. As far as I understand, SSD are fast at reading and slow at writing. They are strong if data rarely changes and if it is mainly read like root partitions. This may be useful for webservers that hold the content in /var/www. Putting your often changing data like swap and /var/log on a SSD may slow down your system. A swap partition is used to save expensive RAM. Don't use much more expensive FLASH-ROM to replace it. Beside that, if your system is heavily swapping, a SSD will wear out quickly. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] list of supported hardware
Hello CentOS list, I have been looking for a list of hardware that is supported by the Centos kernel and its modules. I couldn't find anything in the documentation at Centos nor at RH. Google didn't bring up anything either. Is there any list or will I need to browse the source code directories? Just for clarification, I am not looking for certified hardware. I just want to see if a certain piece of hardware is supported. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Logwatch with Postfix and Amavisd-new
On Tuesday, July 6, 2010 you wrote: I found a couple of programs, postfix-logwatch and amavisd-logwatch. I just downloaded and ran the make install as per instructions. It only installs a script for logwatch to run and puts it in a sensible place with postfix and amavis names It seems that the authors web-site is offline ( http://www.mikecappella.com/logwatch ). Can any kind soul direct me to another place to download this tool? best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] New kernel causes hardware error?
Eric, On Tuesday, June 22, 2010 you wrote: I have recently upgraded to 2.6.18-194.3.1.el5 and within several days the machine crashed with the following error (repeating in mcelog): [...] Would this error indicate a motherboard or CPU problem? How can I diagnose? or is there something funny with the Kernel? I ran across the same problem some time ago. At that time the kernel was updated to recognize a new chip set (the one I use). The errors appeared with the new kernel, but of course they were there (undetected) before. I was checking CPU, memory and finally main board and it turned out that my TYAN board was faulty. You may want to google the error message. I found the exact error string to appear in the new kernel version for the first time. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] cron.hourly runs twice
Timothy, On Tuesday, March 16, 2010 you wrote: Mar 16 14:01:01 helen crond[27833]: (root) CMD (run-parts /etc/cron.hourly) Mar 16 14:01:01 helen crond[27834]: (root) CMD (run-parts /etc/cron.hourly) I just wonder if anyone has come across this curiosity? Or can suggest any possible cause. Did you edit one of the jobs? Some Editors (joe) create a file with an ~ at the end as a backup. If you edit one of your cronjob-scripts in /etc/cron.hourly/ , you may create a second file that will be run by cron too. This happened here some time ago and it took some time to figure out the reason. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] cron.hourly runs twice
Timothy, On Wednesday, March 17, 2010 you wrote: For some reason I cannot fathom, cron.hourly runs twice each hour on one of my two CentOS-5.4 systems, Here comes a very weird idea. I don't know the internals of the cron-daemon good enough to know if this can actually happen. If you have a NTP-job every hour started by cron that corrects the internal time and if your internal clock runs too fast, the system time may be reset every hour so that the cron-job will start twice. As I said, I don't know if cron-daemon has a mechanism that would avoid that problem. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] strange network problem
Dear Juan Carlos, On Monday, March 8, 2010 you wrote: I hope your problem won't be a regular issue and you don't see it again. I don't expect to see it again soon. The machine runs rock solid for a year now without any trouble. Years ago, it happened from time to time that services just died after some time (months?), but I think this doesn't happen any longer. I don't know if this comes from the more decent hardware we are using these days or from better software. All of the servers I've installed have a few tools by default to make tests in this cases (tcpdump (wireshark if gui), iptraf, iptables/pf,netcat,sysinternals(windows),...) and have a monitoring packages (Nagios/Ntop) in other machine to obtain data. Sounds like a good idea. I will put some tools on the machines. again, thanks for your help! best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] strange network problem
Dear Juan Carlos, Are your netmask config Ok? Can you use wireshark to sniff traffic in the middle LANCOM -Wireshark/tcpdump-Xenserver and send me a trace? I couldn't make any further tests on that machine because I couldn't install any software on that machine because of the failing network. However, I took the opportunity and rebooted the machine last night. Guess what, everything is up and running again. Thanks for your assistance and sorry to the list for the disappeared problem. Reboot was no option through the week as this is a production machine under heavy load. -- Mit freundlichen Grüßen Michael Schumacher mailto:michael.schumac...@pamas.de ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] strange network problem
Nobody having an idea? Hi, I am trying to fix a problem I have for about a week now. The environment is: --several independent servers with Centos5.4 on the latest patchlevel (example will be server2) All of them are working properly. --a machine with Xen installed to host some virtual machines (xenserver1) --domu servers on xenserver1 (crmserver1, winserver1) The whole network is connected with a Lancom router to a DSL line. Some days ago I noticed that server2 was updated properly, but xenserver1, crmserver1 and winserver were not updating the OS properly. They seemed to be cut off the internet. I can ping from all to all servers internally, I can ssh from all to all servers internally and I can browse the Internet from server2 successfully (using IP-numbers and hostnames), but xenserver1 and its domu clients could not connect to the internet. I checked the firewalls on xenserver, and crmserver1. They seemed to be OK and stopping them with etc/init.d/iptables stop didn't solve the problem. I can resolve hostnames: [r...@xenserver1 ~]# nslookup www.centos.org Server: 192.168.1.1 Address:192.168.1.1#53 Non-authoritative answer: Name: www.centos.org Address: 72.232.194.162 but I cannot browse neither to elinks http://www.centos.org; nor to 72.232.194.162, however, I can ping www.centos.org successfully. the network routes seem to be OK : [r...@xenserver1 ~]# route Kernel IP routing table Destination Gateway Genmask Flags Metric RefUse Iface 10.1.1.0* 255.255.255.0 U 0 00 eth1 192.168.122.0 * 255.255.255.0 U 0 00 virbr0 169.254.0.0 * 255.255.0.0 U 0 00 eth0 192.168.0.0 * 255.255.0.0 U 0 00 eth0 default LANCOM_1751_1.p 0.0.0.0 UG0 00 eth0 (eth1 is a drbd interface) [r...@crmserver1 ~]# route Kernel IP routing table Destination Gateway Genmask Flags Metric RefUse Iface 169.254.0.0 * 255.255.0.0 U 0 00 eth0 192.168.0.0 * 255.255.0.0 U 0 00 eth0 default LANCOM_1751_1.p 0.0.0.0 UG0 00 eth0 Has anybody any clue where to look? best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] strange network problem
Hi, I am trying to fix a problem I have for about a week now. The environment is: --several independent servers with Centos5.4 on the latest patchlevel (example will be server2) All of them are working properly. --a machine with Xen installed to host some virtual machines (xenserver1) --domu servers on xenserver1 (crmserver1, winserver1) The whole network is connected with a Lancom router to a DSL line. Some days ago I noticed that server2 was updated properly, but xenserver1, crmserver1 and winserver were not updating the OS properly. They seemed to be cut off the internet. I can ping from all to all servers internally, I can ssh from all to all servers internally and I can browse the Internet from server2 successfully (using IP-numbers and hostnames), but xenserver1 and its domu clients could not connect to the internet. I checked the firewalls on xenserver, and crmserver1. They seemed to be OK and stopping them with etc/init.d/iptables stop didn't solve the problem. I can resolve hostnames: [r...@xenserver1 ~]# nslookup www.centos.org Server: 192.168.1.1 Address:192.168.1.1#53 Non-authoritative answer: Name: www.centos.org Address: 72.232.194.162 but I cannot browse neither to elinks http://www.centos.org; nor to 72.232.194.162, however, I can ping www.centos.org successfully. the network routes seem to be OK : [r...@xenserver1 ~]# route Kernel IP routing table Destination Gateway Genmask Flags Metric RefUse Iface 10.1.1.0* 255.255.255.0 U 0 00 eth1 192.168.122.0 * 255.255.255.0 U 0 00 virbr0 169.254.0.0 * 255.255.0.0 U 0 00 eth0 192.168.0.0 * 255.255.0.0 U 0 00 eth0 default LANCOM_1751_1.p 0.0.0.0 UG0 00 eth0 (eth1 is a drbd interface) [r...@crmserver1 ~]# route Kernel IP routing table Destination Gateway Genmask Flags Metric RefUse Iface 169.254.0.0 * 255.255.0.0 U 0 00 eth0 192.168.0.0 * 255.255.0.0 U 0 00 eth0 default LANCOM_1751_1.p 0.0.0.0 UG0 00 eth0 Has anybody any clue where to look? best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] eSATA drive enclosure of a full PC?
John, On Sunday, February 21, 2010 you wrote: a bunch of vendors sell 5-in-3 sata hotswap adapters that hold 5 SATA drives in 3 HH external bays of a jumbo tower chassis. they seem to run about $100. each drive bay has its own sata port on the back of these. example of one of these, http://www.amazon.com/SUPERMICRO-Hot-Swap-Mobile-System-Cabinet/dp/B9ILU0 You may consider using this part: http://www.coolermaster-usa.com/product.php?product_id=2814 The disadvantage is that you have no quick-swap-possibility, but the cooling is better as in hot-swap cases. The box has nice vibe-stoppers so that you have no vibrations on the case. I have several of these boxes and the disks run at least 10C cooler compared to a hot-swap system. And they sell for less than 25$. best regards --- Michael Schumacher ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RAM errors after kernel-update
Hi, to finish that story: The error was actually produced by a faulty motherboard. Tyan replaced it without much trouble. Be advised that MEMTEST86+ couldn't find the problem. thanks for your immediate response. I will replace the board, but I am wondering what the error message actually means? Oct 16 14:07:36 xenserver1 kernel: EDAC MC0: UE row 0, channel-a= 0 channel-b= 1 labels -: NON-FATAL recoverable (Branch=0 DRAM-Bank=0 Buffer ID = 0 RDWR=Read RAS=0 CAS=0 NON-FATAL recoverable Err=0x2000 (FB-DIMM Configuration Write error on first attempt)) I understand that the system logs an error if the configuration data is written into the RAM-configuration. The error happens precisely once a second. Why the * would the kernel reprogram the RAM configuration once every second? -- Mit freundlichen Grüßen Michael Schumacher mailto:michael.schumac...@pamas.de ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] EDAC Kernel Panic 2.6.9-78 and above
Chris, I've got a production system running CentOS 4 that was rock solid until I upgraded from 2.6.9-55 to 2.6.9-78.0.13 (now running 2.6.9-89.0.11). The system now crashes intermittently after a few weeks. I finally caught the panic message : EDAC MC0: INTERNAL ERROR: channel-b out of range (4 = 4) Kernel panic - not syncing: MC0: Uncorrected Error Looking at the kernel changelog, I see that EDAC support was added for the Intel 5000 chipset in 2.6.9-68.20.EL which this server runs. Same issue here with a machine running centos 5.3. The problem began with a kernel update that introduced the 5000 chipset. See the thread RAM errors after kernel-update for more details. I couldn't solve the problem yet, but because the machine crashes every two days with this kernel, I had to boot an earlier kernel without chipset support. I'm trying to determine if this is a potential memory issue, or is this related to some other hardware item. Also considering disabling EDAC in the kernel (is noedac a valid option?) as a last resort. I will run memtest86+ on the server as soon as possible to check the memory, just formulating my game plan if it's something else. Don't use the memtest86+ version that comes with the centos ISO. There is a much newer version available from the authors website. Only the new version identifies the chipset correctly. -- Mit freundlichen Grüßen Michael Schumacher mailto:michael.schumac...@pamas.de ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] RAM errors after kernel-update
Hi everybody, thanks for your immediate response. I will replace the board, but I am wondering what the error message actually means? Oct 16 14:07:36 xenserver1 kernel: EDAC MC0: UE row 0, channel-a= 0 channel-b= 1 labels -: NON-FATAL recoverable (Branch=0 DRAM-Bank=0 Buffer ID = 0 RDWR=Read RAS=0 CAS=0 NON-FATAL recoverable Err=0x2000 (FB-DIMM Configuration Write error on first attempt)) I understand that the system logs an error if the configuration data is written into the RAM-configuration. The error happens precisely once a second. Why the * would the kernel reprogram the RAM configuration once every second? best regards Michael Schumacher mailto:michael.schumac...@pamas.de ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] RAM errors after kernel-update
Hi, I updated a server yesterday from kernel 2.6.18-128.7.1.el5xen to kernel 2.6.18-164.el5xen After rebooting, my message log is flooded every second or so with this error messages: Oct 6 14:52:20 xenserver1 kernel: EDAC MC0: UE row 0, channel-a= 0 channel-b= 1 labels -: NON-FATAL recoverable (Branch=0 DRAM-Bank=0 Buffer ID = 0 RDWR=Read RAS=0 CAS=0 NON-FATAL recovera ble Err=0x2000 (FB-DIMM Configuration Write error on first attempt)) and Oct 6 15:17:23 xenserver1 kernel: EDAC MC0: CE row 0, channel 0, label : Corrected error (Branch=0 DRAM-Bank=0 RDWR=Read RAS=0 CAS=0, CE Err=0x1 (Correctable Non-Mirrored Demand Data E CC)) The machine is a new Tyan S5397 mobo with 16GB Kingston RAM KVR667D2D4F5K2/8G Removing and replacing memory to different locations doesn't make any difference. After some digging, I noticed that the new kernel has added support for the i5400 chipset. I found some reference that the new kernel has this error reporting capability the old one hadn't. Question1: how many recoverable RAM errors are acceptable? Question2: The error appears always with the same id in the error message. Mobo problem? Question3: Are there any recommended BIOS settings to operate the RAM slower to see if the problem disappears? Question4: Any other proposals. Being located in Germany makes the just return it to the dealer proposal quite unattractive. best regards --- Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Remote backup of server
Martin, you may want to take a look on http://www.nongnu.org/storebackup/ I am using that program for some month now. It installs easily, runs over SSH connection, and saves a lot of space on the target machine by hard-linking identical files between various backups. on Friday, September 4, 2009 at 18:23 you wrote: Hello, I want mount directory of one server to another over internet. I was looking to NFS4, but there are no security mechanisms. I need encrypted connection using private key (something like SFTP). Or - if there is in CentOS repo (or EPEL) package, that can mount directory over internet using private key and make differential backup (like rdiff-backup). Thank you very much for links or other resources work up Martin Štastný ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos best regards, Michael Schumacher PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10, D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333 Geschäftsführer: Gerhard Schreck Handelsregister B Stuttgart HRB 252024 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
