Discuss October 2015

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140 participants
113 discussions

SSD for Centos SWAP /tmp & /var/ partition
by Keith Roberts 03 Sep '25

03 Sep '25

Has anyone actually used a SSD in a Centos setup? My little experiment with a s/h WD drive for /tmp and SWAP partitions kicked the bucket on Wednesday, when the poor WD drive caught the click-of-death. It was a s/h drive to start with and lasted about 4 months. But that was without the /var/log/ partition being written to it, as I mounted that back onto /var/log from the original drive. So I had to install another (WD) drive, and repartion it and rebuild my RPM package database, from the backed-up Packages file. That seems to be all OK now. 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. Here's a short video of a laptop fitted with a SSD drive booting macOS, compared to a similar laptop booting from the standard HDD. The laptop with the SSD boots and loads some apps in 28 seconds. The other one takes twice as long. http://eshop.macsales.com/shop/SSD/OWC/Mercury_Extreme_Pro_6G/?utm_source=t… Kind Regards, Keith Roberts ----------------------------------------------------------------- Websites: http://www.karsites.net http://www.php-debuggers.net http://www.raised-from-the-dead.org.uk All email addresses are challenge-response protected with TMDA [http://tmda.net] -----------------------------------------------------------------

33 96

I want to connect to a l2tp server from centos.
by Eliezer Croitoru 22 Mar '17

22 Mar '17

I have a server currently connecting to a pptp remote server. This server(lns\lac) has the option for pptp connections and l2tp connections. The l2tp connections are not using ipsec encryption at all. I have seen couple guides\tutorials on the internet: - https://raymii.org/s/tutorials/IPSEC_L2TP_vpn_on_CentOS_-_Red_Hat_Enterpris… - https://wiki.archlinux.org/index.php/L2TP/IPsec_VPN_client_setup But all the guides that I have found are using ipsec with "secret". On ubuntu there is a gui applet that helps setting these kind of connections up but I am working with a CentOS server and not Ubuntu desktop. If someone used l2tp the same way I want to use on CentOS 7 please give me some advice. If you have a guide which might help me I will be more then happy to see this one. Thanks, Eliezer

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Broadcom BCM4313 support broken with kernel 2.6.32-573.7.1.el6.centos.plus.x86_64?
by wwp 24 Aug '16

24 Aug '16

Hello, I noticed that with latest kernel (2.6.32-573.7.1.el6.centos.plus.x86_64), my laptop's Wifi doesn't work, whereas with previous kernel (2.6.32-504.30.3.el6.centos.plus.x86_64), it works fine. Is this a known issue or did I miss something new? BTW, `lspci` says: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01) Regards, -- wwp

2 2

Any further developments on CentOS7 for i386?
by Kay Schenk 22 Jun '16

22 Jun '16

Well I haven't tested out the CentOS 7 for i386 yet as sent in the message of 06/02-- https://lists.centos.org/pipermail/centos-devel/2015-June/013426.html Nor have I seen any additional information. So how is this going? I'm almost ready to jump in as I would really prefer to be on Gnome 3. -- -------------------------------------------- MzK “The journey of a thousand miles begins with a single step.” --Lao Tzu

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abrt-watch-log -F BUG: WARNING: at WARNING: CPU: INFO: possible recursive locking detected
by Michael H 15 Feb '16

15 Feb '16

Hi All, I've been tuning a server recently and just today this has started to appear in my top/htop output. [root@db1 ~]# ps -aux | grep kernel root 1011 0.0 0.0 212048 4532 ? Ss 13:34 0:00 /usr/bin/abrt-watch-log -F BUG: WARNING: at WARNING: CPU: INFO: possible recursive locking detected ernel BUG at list_del corruption list_add corruption do_IRQ: stack overflow: ear stack overflow (cur: eneral protection fault nable to handle kernel ouble fault: RTNL: assertion failed eek! page_mapcount(page) went negative! adness at NETDEV WATCHDOG ysctl table check failed : nobody cared IRQ handler type mismatch Machine Check Exception: Machine check events logged divide error: bounds: coprocessor segment overrun: invalid TSS: segment not present: invalid opcode: alignment check: stack segment: fpu exception: simd exception: iret exception: /var/log/messages -- /usr/bin/abrt-dump-oops -xtD I had made a few changes to sysctl.conf which I have now reverted and the error still exists. my sysctl.conf contained; vm.swappiness=0 vm.overcommit_memory=2 vm.overcommit_ratio=90 - this was only added this morning because of an 'out of memory' error in postgresql. kernel.shmmax=35433480192 kernel.shmall=2214592512 which I have now removed. Can anyone shine any light on this? A little search on Google mentions faulty memory, I will install memtest today and see what the output is like. Thanks Michael

2 1

safest way to grow a LV under VMware ESXi5.5
by Boris Epstein 08 Nov '15

08 Nov '15

Hello all, In your view, what is the most reliable and safe way to increase an LV housing the root filesystem of a Centos 6 VM. I am thinking either growing the virtual HD virtual device, or creating a new device and adding it as a PV to the VM, or perhaps migrating the whole FS to a new virtual disk. Any input on how best to proceed would be appreciated. Cheers, Boris.

5 7

use pssh to restart a service
by Tim Dunphy 02 Nov '15

02 Nov '15

Hi all, I need to restart a service on a few elasticsearch nodes. I'm trying to do it with pssh. I'm getting this error when I try to do that: pssh -h es_list "/bin/sudo -S /bin/systemctl restart elasticsearch" [1] 17:01:50 [FAILURE] bluethundr(a)es2.example.com Exited with error code 1 [2] 17:01:51 [FAILURE] bluethundr(a)es3.example.com Exited with error code 1 [3] 17:01:51 [FAILURE] bluethundr(a)es1.example.com Exited with error code 1 I have to sudo up from my user account as root logins are disallowed. However a simple 'echo hello' command that doesn't require sudo works fine: #pssh -h es_list "/bin/echo hello" [1] 17:00:40 [SUCCESS] bluethundr(a)es1.example.com [2] 17:00:41 [SUCCESS] bluethundr(a)es3.example.com [3] 17:00:41 [SUCCESS] bluethundr(a)es2.example.com What am I doing wrong? Thanks, Tim -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B

5 10

OT Strange IP address on home network
by Timothy Murphy 02 Nov '15

02 Nov '15

Why does "arp -a" show IP address 169.254.192.123 on my 192.168.2.0 home network? I recall seeing this IP address somewhere, but don't remember where. -- Timothy Murphy gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin

8 14

About ecryptfs-utils
by Sergio Belkin 01 Nov '15

01 Nov '15

Hi folks, I've found ecryptfs module into kernel-plus, but ecryptfs-utils is missing: [root@centos7 ecryptfs-utils-108]# uname -r 3.10.0-229.14.1.el7.centos.plus.x86_64 [root@centos7 ecryptfs-utils-108]# lsmod | grep ecryptfs ecryptfs 85424 0 [root@centos7 ecryptfs-utils-108]# yum -q repolist id del repositorio nombre del repositorio estado Webmin Webmin Distribution Neutral 229 base/7/x86_64 CentOS-7 - Base 8.652 centosplus/7/x86_64 CentOS-7 - Plus 63 epel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 8.654 extras/7/x86_64 CentOS-7 - Extras 236 updates/7/x86_64 CentOS-7 - Updates 1.540 zfs/x86_64 ZFS on Linux for EL7 145 [root@centos7 ecryptfs-utils-108]# LANG=C yum -q search ecryptfs-utils Warning: No matches found for: ecryptfs-utils Just I wonder why these package is not included in any CentOS repo (I guess because is not included in upstream), do you know why? Thanks in advance! -- -- Sergio Belkin LPIC-2 Certified - http://www.lpi.org

3 3

C7: screensaver locks screen
by Fred Smith 31 Oct '15

31 Oct '15

Strange thing just began happening this past weekend with my Centos-7 netbook (using the MATE desktop, which may mean it's an EPEL problem...). the lock screen checkbox in the screensaver's UI is NOT checked. I've even used the dconf editor to uncheck ALL the boxes in the screensaver section that relate to locking the screen. nada. no such luck. even after rebooting, it still locks the screen. I'm open to further suggestions, thanks in advance! Fred -- ---- Fred Smith -- fredex(a)fcshome.stoneham.ma.us ---------------------------- Do you not know? Have you not heard? The LORD is the everlasting God, the Creator of the ends of the earth. He will not grow tired or weary, and his understanding no one can fathom. ----------------------------- Isaiah 40:28 (niv) -----------------------------

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Discuss October 2015