Questions specific to the CentOS Linux distribution. Use this tag if your question relates to how the CentOS distribution affects your problem; do not use it if you just happen to be using CentOS and your question is about a specific configuration detail or syntax.

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2
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0answers
540 views

Odd Inode/Ram cache drops happening in CentOS

I run a CentOS 5.7 machine (64bit) with 24GB ram and 4x SAS drives in RAID10 setup. This machine runs nginx/1.0.10, php-fpm & xcache. About a month back the RAM usage of this machine has changed. ...
2
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0answers
553 views

Redmine install on CentOS

I'm trying to install Redmine on CentOS 5 following the instructions on the Redmine wiki. I've gotten to the "Configure Apache to host the documents" step without errors. That links to another ...
2
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0answers
182 views

How do I install dvd-slideshow on Centos 5?

How do I install dvd-slideshow on Centos 5? http://dvd-slideshow.sourceforge.net/wiki/Main_Page I tried but only found a gui to install on Ubuntu. I'm using Centos 5, command line.
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0answers
11 views

Why do I get “no credentials cache” error when mounting Kerberized NFS share?

I have two systems on a local network, nfsclient (CentOS 7) and nfsserver (CentOS 6). These names correctly resolve to their IP addresses, and Kerberos is working between them (nfsserver is the KDC). ...
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0answers
16 views

Changing CentOS 7 machines disables terminal access during background task

Based on this other posting, I typed the following command into a CentOS 7 terminal on a devbox that has the gnome GUI, and was able to continue to use the terminal for other commands while the ...
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0answers
33 views

Reinstaling NSS library on CentOS (Amazon AMI)

I had a problem during updating of the packages on CentOS AMI from Amazon (S3). I got a bunch of duplicated packages. Among them: nss-softokn-freebl-3.16.2.3-14.2.38.amzn1.x86_64 is a duplicate with ...
1
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0answers
25 views

How to solve File-based locking initialisation failed.

Am on a CentOS-Minimal Virtual Machine, i had accidentally deleted a hard disk that contained a Volume Group (LVM). After rebooting i got an error saying " File-based locking initialisation failed". ...
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0answers
34 views

Runlevels behaviour when kill script has failed

When I execute sudo init 3, the system executes the kill scripts in /etc/rc.3/ One of those scripts returns a failure (this is expected because the thing it's trying to do won't work). When I then do ...
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0answers
27 views

How to reboot a server with a LUKS encrypted partition

I have a CentOS 6 VM on which I used the following shell script for installing and configuring MongoDB to use a secondary LUKS (dm-crypt) encrypted disk for its database files: #!/bin/bash -e # Set ...
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0answers
26 views

How to enable additional audit logging?

We use Auditd to monitor specific changes on Linux systems. Majority of our rules come from CIS Benchmark guidelines and then few are added specifically to monitor certain command executions. We have ...
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0answers
39 views

Total memory decreased when increasing swap file?

I am running a low-end server with about 1GB RAM and I was trying to optimize my ram. But after increasing my swap file and emptying the buffers, my total ram, judging from free -m, have lowered from ...
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0answers
20 views

VLAN setup via command line works, ifcfg-ethX.Y does not (CentOS 6.8)

I have CentOS 6.8 running in a Parallels VM. eth0 is bridged to the Ethernet adapter in the Mac. I need the CentOS server running a specific VLAN (10), so I have read this RHEL documentation. eth0 ...
1
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0answers
22 views

Minecraft acting differently when started from terminal compared to started by cron job at start-up

So I use a CentOS Linux 7.2.1511 server, where I host a couple of things, amongst them a Minecraft server. Since from time to time server is rebooted I scheduled a cron job to run minecraft server on ...
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0answers
44 views

Centos 6.6 box with single wordpress site - out of memory: kill process httpd repeatedly

So I have a Centos 6.6 box running as a LAMP stack. PHP 5.3.3 | Apache 2.2.15 | MySQL Server 5.1.73 This box is a VM running on XenServer 6.5, It has 4Gb memory available. total ...
1
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0answers
4 views

Are default zones not pre-populated following a fresh install in firewalld?

CentOS 7 / Minimal Install I want to get my feet wet with firewalld and am coming across some beginner issues. I installed it via yum install firewalld I enabled it via systemctl enable firewalld....
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0answers
18 views

Firewalld forwarding between zones not working

I have a centos 7 kvm hypervisor running multiple VMs that are configured to use NAT networking. These VMs run their services, of which ssh is the most important for administration purposes. I would ...
1
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0answers
16 views

gnome desktop is making automatic annoying pronunciation sounds?

for example when i put my mouse pointer to applications.It says "windows applications label" when i go to network mangager -> wifi it spells the words on each and every setting where my mouse goes. ...
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0answers
19 views

Using mail spool file for an entry in /etc/aliases gives errors in EL7

For years (with EL6 and before), I have successfully used entries like this in my /etc/aliases file: bugs: /var/spool/mail/bugs The idea being mail to a non-user can be shoved into a file for ...
1
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0answers
12 views

Centos 6 FTP problem

I have a VPS running CentOS 6. I've tried multiple FTP servers but the following problem keeps me stuck. I want all users to have FTP access to their own folder in /home, so I configured Pure-FTPd to ...
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0answers
13 views

Extending XFS filesystem CentOS 7 Google Cloud

I have Googled everything, and literally nothing is working. Here is df -h: Filesystem Size Used Avail Use% Mounted on /dev/sda1 10G 7.7G 2.4G 77% / devtmpfs 103G 0 103G ...
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0answers
36 views

Email not received with mail command from terminal in CentOS

I am trying to send mail with the following command: echo "Hello" | mail -s "Hello" myaddr@mydomain.com and than checking the exit status as: echo $? which outputs 0 Of course myaddr and ...
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0answers
45 views

How to receive files via bluetooth in Centos?

I've read the GNOME Help for Centos 7 in order to receive files from my phone via bluetooth. It suggests me to enable Bluetooth Sharing in Settings → Sharing, and switch Save Received Files to ...
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0answers
47 views

YUM: updating repo's GPG key

Haven't found the answer for this in docs: how often Yum refreshes the GPG key of a repo, if it was obtained from the net? For instance, I've got this repo config: [myrepo] name=myrepo baseurl=http:/...
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0answers
47 views

Can't get usb ethernet adapter running under CentOS 6 minimal

I have a cheap usb adapter and using it on a minmal CentOS 6.7 box, when I plug in the adapter it's recognized as usb device but not as ethernet adapter, although I've loaded these kernel modules: ...
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0answers
25 views

Where is my 7za data being written to

I have a weird question about 7za on Centos 7. I am adding a file to a 7za archive using the following command (the total size of the directory is around 40GB) /usr/bin/7za a -ppassword -t7z -mmt=off ...
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0answers
151 views

can't save docker image: Error response from daemon: chtimes: invalid argument

i can't save my docker images, when i try to save a container, it fails: Error response from daemon: chtimes /var/lib/docker/tmp/docker-export-616188241/...
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0answers
20 views

UUID of LUKS changes when cloned

I am trying to install Centos 7 (under LUKS) on a virtual machine in Fedora 23 using virt-manager and after that to clone that image to multiple USB drives. The problem is that the virtual machine ...
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0answers
23 views

Trying to build icecc icemon, cmake can't find Qt5

I'm running Centos 7 and I want Icemon for icecc. If there is a package I can install, great, but I don't know of one, so I'm attempting to build it from scratch and that relies on cmake. My missing ...
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0answers
30 views

prelink - weird massive modification after installing zabbix-agent

I thought I knew something about prelink, but I ran into weirdest issue yesterday. I know I shouldn't use prelink, but I've noticed it is enabled on one of CentOS 6 systems under my administration ...
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0answers
129 views

SMB server not working after upgrade from 3.5 to 3.6

our Windows 7/2008 clients can't access our samba server any more after the upgrade to version 3.6. This is on CentOS 6 (rpm --query centos-release reports centos-release-6-7.el6.centos.12.3.x86_64). ...
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0answers
32 views

Is there a way to interleave two filesystems of the same structure?

I have a large networked file system whose backup routine sees some file systems as higher priority than others and are given more redundancy with backups. At present those file systems are visible as ...
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0answers
53 views

How add configure to add default gateway from different subnet?

I am working in a host in LAN segment of 192.168.148.X with subnet mask 255.255.255.0. The LAN should be configured to use 192.168.128.1 as default gateway. What I normally do is to issue following ...
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0answers
35 views

Can I install a .vmlinuz-<version>.hmac for an installed kernel after the fact?

I installed a kernel from elrepo on my asus ux501jw, centos7 os. I have tried the 4.5.0 and the 4.4.6 versions. Both of them do not install the hmac file /boot/.vmlinuz-.hmac file. Concequently the ...
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0answers
527 views

How to solve [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon module! in CentOS 7?

I watched my laptop reboot after a system update and there was an error mention that caught my attention. I issued a # dmesg | grep radeon and the results were: [ 0.000000] Command line: ...
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0answers
43 views

Bash command history stops working after starting new tmux session

My bash command history stops working after starting a new tmux session. No previous commands when typing up, down, reverse search, no output from running history. I've confirmed that this happens ...
1
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0answers
85 views

Add AHCI to initrd on CentOS7 after installation

I built a complete CentOS7 system with lots of tools, preferences, etc in a VMware guest. Once working fine I moved it to my physical server. I managed to get grub2 installed and the bootloader now ...
1
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0answers
195 views

yum update glibc - ERROR with rpm_check_debug vs depsolve:

I want to update my system with yum update but I get only errors starting with these two lines: Running rpm_check_debug ERROR with rpm_check_debug vs depsolve: Then, I tried only to update the ...
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0answers
58 views

How can I tell if xfs_repair is stuck or still running?

I have a backup server with ~72TB of space. Only about half of that is used. Earlier in the week I got the following message and directly after the xfs filesystem was unmounted. Mar 15 15:15:47 ...
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0answers
114 views

Mono 4.4.0.40 on CentOS 6.7 x64 fails compilation with SigAbrt

I am trying to build the mono Source from Github. I've downloaded the latest tagged release which is 4.4.0.40. I've run the following commands: ./autogen.sh make get-monolite-latest make But I get ...
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0answers
50 views

NameVirtualHost address is not supported, proceeding with undefined results

Apache Details Server version: Apache/2.2.15 (Unix) Server built: Aug 28 2015 22:18:57 Varnish varnishd (varnish-3.0.7 revision f544cd8) Copyright (c) 2006 Verdens Gang AS Copyright (c) 2006-2014 ...
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0answers
39 views

Hostname won't resolve after setting up new server

I just completed a fresh install of Centos 7 on a PC. It is connected to the campus network, so I am not in control of the DNS server. I gave it a hostname by setting the HOSTNAME value in /etc/...
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0answers
38 views

CentOS install - select existing partition as /

I'm installing CentOS on a system that has pre-defined partitions (XFS, created by Ubuntu 14.04 Live CD). I can select the little 500MB partition and give it a mount point of /boot no problem. When ...
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0answers
140 views

Force OpenVPN to route all traffic through one IP address (2 IPs on same NIC)

I've trying to dig up a solution for this, but all I keep turning up is how to bind OpenVPN to a particular hardware interface. Not quite what I need to do here. I run a server and I have 2 IPs at my ...
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0answers
102 views

CentOS 7 unable to cleanly umount a bind mount using rbind and rslave

The following sequence of commands will fail on CentOS 7 (kernel version: 3.10.0-327.10.1.el7.x86_64): [hidden]$ mkdir -p A B/a C/b [hidden]$ sudo mount --bind A B/a [hidden]$ sudo mount --rbind B C/...
1
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0answers
39 views

List services with port numbers

I would like to list all installed services (especially running) with their port numbers, where they are assigned. Could you be so glad and help me with this command?
1
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0answers
44 views

Centos 6.x multi-homed routing question

I have a conundrum and would like to hear any pointers (been working on this for 2 days now, and need to get this server in to production). My "google-foo" has not been strong with this one....
1
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0answers
24 views

How to make printer added through CUPS show up in the default printer list on Centos

I have added a network printer with cups, I can send a test print page through the cups web interface. However the printer wont show up in the default printer menus (i.e. when you press through ...
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0answers
32 views

Monitor mirroring

I need to mirror a remote monitor from a server running CentOS 6.5. With VNC I'm able to connect to the :0 display (that it's the one it is shown on the remote server monitor) but when I change user ...
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0answers
70 views

GRUB2: adding insmod xxxx module in the grub.cfg properly

I want to add my own custom grub2 module, for ex. xxxx.mod into the grub.cfg. How can I do that? For example, here i want to add insmod xxxx.mod below: ### BEGIN /etc/grub.d/10_linux ### menuentry '...
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0answers
964 views

mount: special device /dev/sda1 does not exist

I had a CentOS 6 server suddenly lock up on me after doing about 2 weeks of calculations for a project. Upon reboot, the machine would crash while attempting to mount the devices listed in the fstab ...