Discuss May 2016

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155 participants
149 discussions

iptables.service listed as: not-found inactive dead
by Alexander Farber 31 May '16

31 May '16

Hello fellow CentOS users, on a freshly installed 7.2 machine and after reading https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/ht… I try to enable iptables with following commands: # cat /etc/centos-release CentOS Linux release 7.2.1511 (Core) # rpm -qa | grep iptables iptables-1.4.21-16.el7.x86_64 # sudo systemctl list-units --type service --all | grep iptables ● iptables.service not-found inactive dead iptables.service # sudo systemctl enable iptables.service Failed to execute operation: No such file or directory What missing file is meant here please? Thank you Alex

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Status of RPMFusion repo for CentOS 5 and 6 ?
by Nicolas Kovacs 31 May '16

31 May '16

Hi, I have to maintain (and eventually beef up) desktop clients in public libraries running CentOS 5 and 6. The hardware is still OK, though sometimes really old, so the least evil will be to keep CentOS 5 on the old machines until that version is EOL. I've been using CentOS 5 as my main system somewhere between 2007 and 2009. At the time the RPMForge was my favorite third-party repository, though I understand that project is dead. I'm looking for a clean and viable solution to replace this. Here's what I intend to do. 1. Configure the base, updates and extra repos with a priority of 1. 2. Configure EPEL with a priority of 10. 3. Configure RPMFusion with a priority of 10. Now I don't know about the status of RPMFusion. Is this third-party repo still maintained? I wonder, since their home page only gives information about RHEL/CentOS 5 and 6. From what I understand, it's healthy to mix it with an EL+EPEL base. I'm planning to add some basic (and somewhat extended) multimedia capability to those desktop clients, so packages like mplayer, ffmpeg, lame and the likes will come in handy. For eventually missing packages (like eventually an old version of VLC for reading DVDs), I'll just grab the SRPMS from the old RPMForge repo and setup my own repo after building them locally. Any suggestions? Niki Kovacs -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Web : http://www.microlinux.fr Mail : info(a)microlinux.fr Tél. : 04 66 63 10 32

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CENTOS 7.2.1511 Multipath and boot from SAN issue
by Fabien Ledoux 31 May '16

31 May '16

Hi all, I'm running a Centos 7.2.1511 freshly installed on a SAN device. Everything is fine on the SAN side, but I have an issue with multipath or udev or systemd, I'm not sure. I when I boot my machine with the multipathd service enabled at boot, boot fails beacause some partitions on the multipathed device are missing from /dev. >From the boot rescue shell, if I do a fdisk -l /dev/mapper/mpatha, I see 8 partitions, if I do a ls -l /dev/disk/by-uuid/ I see only 6 devices, so two devices are missing. I have to run kpartx -a /dev/mapper/mpatha manually in order to reread the partition table and recreate the 2 missing device. Only after that I'm able to boot correctly. Any idea of te root cause of this issue ? device-mapper-multipath is 0.4.9-85.el7_2.4.x86_64 Thanks for your time.

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Kernel panic on 6.8 release with kernel-2.6.32-642.el6.x86_64
by Sorin Srbu 31 May '16

31 May '16

Hi all, Just tested the new CentOS 6.8 release on a few VMs and a physical box and got a kernel panic. Is it just me, or anybody else as well? Just fishing for now, will look into the issue more thoroughly later today. -- BW, Sorin ----------------------------------------------------------- # Sorin Srbu, Sysadmin # Uppsala University # Dept of Medicinal Chemistry # Div of Org Pharm Chem # Box 574 # SE-75123 Uppsala # Sweden # # Phone: +46 (0)18-4714482 # Visit: BMC, Husargatan 3, D5:512b # Web: http://www.orgfarm.uu.se ----------------------------------------------------------- # O< ASCII ribbon campaign - Against html E-mail # http://tinyurl.com/ascii-ribbon-campaign # # This message was not sent from an iProduct! # # Please consider the environment before printing this email. # Join the campaign at http://thinkBeforePrinting.org # # MotD follows: # The best prophet of the future is the past.

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CentOS 6 spontaneous reboots
by Bill Gee 30 May '16

30 May '16

Hello everyone - My CentOS 6.8 server has been rebooting itself every 2 to 4 hours for the last several days. I do not know where to look for logs that might give a clue what the problem is. There are no unusual entries in /var/log/messages. I looked over other log files in /var/log and found nothing suggestive. Where else can I look? By luck I saw the beginning of a reboot on the server console. Normally I have other systems up on the KVM switch. It appears to have dumped core. I don't know where to look for the core dump files. They are not in /root. The problem started while the server was still 6.7. It had almost 290 days of uptime when the problem started. I have tried the following, none of which made any difference. I ran the upgrade to 6.8. I tried stopping non-essential services two at a time. I ran MemTest 86+. No memory errors were found. I turned off swap. I unplugged the USB hard drive that I use to hold daily and weekly backups. It was being recognized as /dev/sda for some reason. Lm_sensors shows the processor running between 45 and 50C. Hddtemp shows the hard drives running between 35 and 40C. LM_Sensors does not produce valid data on fan speed, but a visual check shows all fans running normally and no build-up of dust. The system is behind a big UPS that runs several other systems. The UPS log file does not record any power failures and none of the other systems are rebooting at random. What else can I look at? Thanks - Bill Gee

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C6.8 YUM reference to Red Hat
by Always Learning 30 May '16

30 May '16

Doing a yum update on C6.8 ................. : yum update Loaded plugins: fastestmirror, priorities, protectbase Setting up Update Process Loading mirror speeds from cached hostfile * base: centos.datente.com * epel: mirrors.n-ix.net * extras: mirror.softaculous.com * updates: centos.datente.com base | 3.7 kB 00:00 base/primary_db | 4.7 MB 00:00 cr | 3.3 kB 00:00 cr/primary_db | 1.2 kB 00:00 epel | 4.3 kB 00:00 epel/primary_db | 5.8 MB 00:00 extras | 3.4 kB 00:00 extras/primary_db | 36 kB 00:00 mariadb | 2.9 kB 00:00 http://mirror.centos.org/centos/6/SCL/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found" Trying other mirror. To address this issue please refer to the below knowledge base article https://access.redhat.com/articles/1320623 If above article doesn't help to resolve this issue please open a ticket with Red Hat Support. ~~~~~~~~~~~~~ The Red Hat explanation is blocked. All one can read is " This issue generally occurs if client system is able to commun... Subscriber exclusive content" QUESTIONS (1) Should the Red Hat link be replaced by a Centos one ? (2) Why am I seeing a 'SCL' URL when I have not subscribed to Software Collections ? (3) I did not get the error when updating other C6 installations around Europe, probably because they used different sources, so is the error caused by a faulty mirror file ? Despite the error, I successfully installed acpid x86_64 1.0.10-3.el6 base 37 k centos-release x86_64 6-8.el6.centos.12.3 base 21 k findutils x86_64 1:4.4.2-9.el6 base 447 k logwatch noarch 7.3.6-54.el6 base 303 k pango x86_64 1.28.1-11.el6 base 351 k passwd x86_64 0.77-7.el6 base 89 k wget x86_64 1.12-8.el6 base 484 k Comments and advice welcome and appreciated, as always. -- Regards, Paul. England, EU. England's place is in the European Union.

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grub (?) issue on Optiplex 780 A15, 6.8 upgrade
by Zube 30 May '16

30 May '16

Most of the upgrades to CentOS 6.8 have gone smoothly. Thanks, as always, for all the work that goes into making it so easy to upgrade. On a few machines, however, all of them curiously: Dell Inc. OptiPlex 780 /0C27VV, BIOS A15 08/06/2013 There is something wrong with their interaction with grub (?). I noticed this after adding '3' to the module line to get it to runlevel 3, but the machine came up at runlevel 5 anyway. On machines that are working correctly, the dmesg output looks like this: Command line: /boot/vmlinuz-2.6.32-642.el6.x86_64 ro root=UUID=20a8bd64-5783-4007-a5e4-e41bfc07f3c8 intel_iommu=on rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb rdblacklist=nouveau quiet if the options are on the module line or like this: Command line: ro root=UUID=7d11ff13-106f-42df-9a41-9ebf2505f6d2 rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet crashkernel=auto rdblacklist=nouveau if the options are on the kernel line. But on the offending machines, it looks like this: Command line: /boot/vmlinuz-2.6.32-642.el6.x86_64 ro root=UUID=2a0a0120-8155-4ef4-8048-c82567746ca9 intel_iommu=on amd_iommu=on rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet rdblacklist=nouveaulevel: RAID 0: Stripes data (performance). RAID 1: Mirrors data (redundancy). Recovery: Copies data between a master and a recovery disk. So something seems to be scribbling somewhere where it shouldn't. These machines are not RAIDed in any way and I'm confident that I didn't see this problem when I upgraded to 6.7. If I reduce the length of the module line, it just scribbles a bit further back, i.e. "rdblacklist=nouveau1(Mirror)" Any advice appreciated. Cheers, Zube

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Successful update from CentOS 6.7 to CentOS 6.8, but ...
by Walter H. 30 May '16

30 May '16

Hello, I have several CentOS 6 VMs, I have updated the first one successfully, but there is one thing I miss or I don't like; How do I get the standard console with 80x25 back? this is /boot/grub/grub.conf default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.32-642.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-642.el6.x86_64 ro root=UUID=a27dc9a0-ea3a-497d-a9c3-80c7bbba31fa rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_NO_DM rd_NO_LVM KEYBOARDTYPE=pc KEYTABLE=de config_NO_HZ vga=0x0300 initrd /initramfs-2.6.32-642.el6.x86_64.img I've added 'vga=0x0300' (the same would be 'vga=768'), but this results in 100x37? Thanks for Help, Walter

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Re: [CentOS] centos7 tmpfiles.d deleted outdate files
by Qiang Chen 30 May '16

30 May '16

Hi Jonathan Billings, the `age` can't apply to 'r', only would apply to 'd', 'D', 'x', 'X', etc "The age field only applies to lines starting with |d|, |D|, |v|, |q|, |Q|, |C|, |x| and |X|. If omitted or set to "|-|", no automatic clean-up is done." so, there have good idea if I only want to delete the specific files not all files in that dir? thx. On 2016年05月26日 20:54, Jonathan Billings wrote: > Boxbe <https://www.boxbe.com/overview> This message is eligible for > Automatic Cleanup! (billings(a)negate.org) Add cleanup rule > <https://www.boxbe.com/popup?url=https%3A%2F%2Fwww.boxbe.com%2Fcleanup%3Fkey…> > | More info > <http://blog.boxbe.com/general/boxbe-automatic-cleanup?tc_serial=25540750649…> > > > > On Thu, May 26, 2016 at 03:03:25PM +0800, Qiang Chen wrote: >> Would some one help me for this question? thanks very much. > I would suggest reading the tmpfiles.d man page. > > Use 'd' for the directory, and 'r' for the files you want to remove, > including the age. Something like 'r /path/* - - - 10s'. > -- Best Regards, Chen, Qiang

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Re: [CentOS] centos7 tmpfiles.d deleted outdate files
by Qiang Chen 30 May '16

30 May '16

so, there no method to delete special files that below a directory? such as in the directory [root@chenqiang]# tree . ├── test_10d └── test_20d 0 directories, 2 files [root@chenqiang]# ll total 8 -rw-r--r-- 1 root root 4 5月 20 19:14 test_10d -rw-r--r-- 1 root root 4 5月 10 19:15 test_20d So, I want to delete file test_20d, keep test_10d, how to do that? thx. On 2016年05月27日 02:12, Gordon Messmer wrote: > Boxbe <https://www.boxbe.com/overview> This message is eligible for > Automatic Cleanup! (gordon.messmer(a)gmail.com) Add cleanup rule > <https://www.boxbe.com/popup?url=https%3A%2F%2Fwww.boxbe.com%2Fcleanup%3Fkey…> > | More info > <http://blog.boxbe.com/general/boxbe-automatic-cleanup?tc_serial=25543758553…> > > On 05/24/2016 11:18 PM, Qiang Chen wrote: >> #Type Path Mode UID GID Age Arg >> d /chenqiang 0775 root root 10s >> f /chenqiang/test_10s 0660 root root 10s >> f /chenqiang/test_20s 0660 root root 20s >> ``` >> >> It can delete dir if the age > 10s, but can't delete the files in it. > > > The man page for tmpfiles.d says, of the age field: > "The age field only applies to lines starting with d, D, and x." > > So, the line: > > d /chenqiang/test_10s 0660 root root 10s > > indicates that systemd-tmpfiles should create the directory > /chenqiang/test_10s, owned by root/root with mode 0660, and > periodically clean it of files and empty directories more than 10s old. > > Note that the default configuration runs systemd-tmpfiles once per > day, so specifying time periods much smaller than that may not be useful. > > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > https://lists.centos.org/mailman/listinfo/centos -- Best Regards, Chen, Qiang

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Discuss May 2016