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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1
vote
1answer
641 views

Access old version of file

I was working on a file locally in Notepad++ and uploaded it via FTP to server - during the upload something went wrong without me realising and the uploaded file is now empty (size shows as 0). I ...
13
votes
1answer
23k views

The name > org.freedesktop.PolicyKit1 was not provided by any .service files

When attempting to launch system-config-users from command line, I get the following warning, and the tool does not open. I'm using CentOS 7 with Mate 1.8.1. WARNING **: Error enumerating ...
-2
votes
1answer
973 views

Delete all mails from inbox using linux command prompt

How can I delete emails from an individual email account? e.g. how can I empty userxyz@mydomain.com? I know the following: /var/spool/mail/mydomain /var/mail/mydomain I have many inboxes some of ...
2
votes
0answers
399 views

SNAT with firewall-cmd?

I have an interface with multiple IP Addresses (on CentOS 7), which is in zone "external" (with masquerade on). I want to specify that, if a connectiona attempt to a specific address goes out, to use ...
0
votes
2answers
480 views

How to run screen as non-root user in CentOS 5

I've followed this guide http://centoshelp.org/resources/scripts-tools/a-basic-understanding-of-screen-on-centos/ Now, seems like I am having trouble running screen with non-root user, because ...
0
votes
2answers
180 views

Memcached on a webserver

We host a Magento webshop hosted by Amazon EC2, and we have speed issues. We're currently looking at moving to another provider. We found one hosting provider where we have a test account now. Speed ...
1
vote
1answer
272 views

CentOS 6.5 : machine with more that 1 TB RAM => “no free pages available” on boot

I have a upgraded a server with more than 1 TB of RAM, and it is unable to boot. With 768GB of RAM all is working fine. I got the following message : Trying to allocate 1005 pages for VMLINUZ. [...
1
vote
0answers
62 views

Installing an OS from source on separate partition. Is this possible?

I'm trying to install Minimal CentOS on a small partition and the installer quits and brings me to a prompt every time. It says something like it can't find initrd.img. I was wondering if I could ...
0
votes
1answer
3k views

Static IP for Wifi Centos 7

Can someone explain to me how to setup a static ip for wifi on CentOs 7? This the configuration file I have for the network using DHCP: ESSID="Network name" MODE=Managed KEY_MGMT="key type" ...
0
votes
0answers
394 views

Unable to install CentOS 7

I have been trying to install CentOS 7 on a computer with no success so far. I am able to boot the live USB media, but the problem is the CentOS installation referring the HDD always as /dev/sdb. No ...
0
votes
2answers
10k views

How can I see settings of the email server?

I have root access to a Linux server (CentOS 5.10). I want to see the email server's settings such as whether SMPT is working, wheter there is an email server, port number, does it require SSL, what ...
0
votes
0answers
496 views

Connection failed to any VPN!

PPTP VPN and OpenVPN don't connect and both return error about VPN Secret in my CentOS 6.4 x64 machine! I've already tested the configurations in Windows and Ubuntu with no problem. I also noticed ...
1
vote
2answers
3k views

Windows Server 2012 R2 and Centos 7 dual boot: Windows gone from boot menu

I had in my mind that I cannot do much wrong when installing Linux (CentOS 7) after Windows (Server 2012 R2) to get all OSs as boot options. So, after installing Server 2012 R2 nicely, I installed ...
2
votes
1answer
378 views

What's the difference between TYPE and DEVICETYPE directives in ifcfg scripts?

While learning the Network Teaming objective of the RHCE (RHEL7) exam I noticed that examples use DEVICETYPE directive in the ifcfg scripts for master and port interfaces. I knew there was TYPE ...
0
votes
1answer
3k views

How to surpress audit daemon rotating log messages?

On a CentOS 7 system messages like these are logged several times a day: Sep 24 00:11:42 example.org auditd[756]: Audit daemon rotating log files Sep 24 00:26:23 example.org auditd[756]: Audit daemon ...
1
vote
2answers
926 views

What is the difference between installing software as root versus user?

I just installed CentOS 7 with Gnome desktop. In doing so, I created a root password, and added a user. Now I am logged in as the user. I like to install MariaDB server, PHP, and other software. To ...
1
vote
1answer
379 views

Telnet no echo output from xinetd script

I have have installed xinetd, and I wrote a script: #!/bin/bash echo "Some text" touch /home/somefile I made a service configuration under /etc/xinetd.d/ and basically it works when I connect to ...
1
vote
0answers
786 views

No volume groups found after restoring CentOS image to VirtualBox VM

I used Clonezilla to backup an HP Proliant server running CentOS 5.10. I restored the image to a VirtualBox VM but when I try to boot I get an error of "No volume groups found" "Volume Group "...
3
votes
1answer
668 views

Problems while executing slimerjs on linux (Centos 6.5 32bit)

I'm not used to work with Linux yet I wanted to try to use slimerjs on a Linux vps in order to have access to php exec function since most hosting companies disable that function. I did manage to ...
4
votes
2answers
846 views

Centos 6.5 only using 24GB/48GB of memory

I recently installed an additional 32GB of memory in my Dell PowerEdge R900 home virtual machine server. Memory check passed and I booted into CentOS. When I opened the Virtual machine manager and ...
1
vote
0answers
385 views

Yum or Reposync: How can I slowly remove a repository without unintended dependency issues?

I have used reposync to create and maintain local copies of two repositories, remi and remi-test. These are repositories maintained by Remi Collet. On several systems in an internal LAN, I added both ...
2
votes
3answers
4k views

CentOS 7 created mdadm array disappears after reboot

I created a raid1 using the below disks and command: $ ls -l /dev/disk/by-id/ata-ST3000* lrwxrwxrwx 1 root root 9 Sep 19 07:27 /dev/disk/by-id/ata-ST3000DM001-9YN166_Z1F04NR1 -> ../../sdc ...
1
vote
1answer
57 views

Empty kernel processes on CentOS vps : 2 different servers

I'm not sure I'm asking correctly, or perhaps I'm just looking at the wrong things. I'm migrating from one CentOS Vps (on an OpenVZ box) to another CentOS VPS (on a VMWare box). VPS #1 = CentOS ...
3
votes
1answer
9k views

How to Mount a Drive with Right Filesystem?

I am trying to mount the device /dev/xvdc on my CentOS system. When I run an fdisk command I get: Device Boot Start End Blocks Id System /dev/xvda1 * 1 33 ...
2
votes
1answer
20k views

CentOS 7 persistent routing issue?

I have Googled a lot but still can't find a working way on how to make some persistent routes on centOS 7. [root@asd network-scripts]# route -n Kernel IP routing table Destination Gateway ...
0
votes
1answer
5k views

Unable to install ATI Catalyst drivers under CentOS 7

I'm getting an error running ./amd-driver-installer-14.20-x86.x86_64.run # ./amd-driver-installer-14.20-x86.x86_64.run Created directory fglrx-install.xjgOcJ Verifying archive integrity... All good. ...
1
vote
1answer
157 views

Keychain SSH Key Manager prevents SFTP login on CentOS

I installed keychain and added this to my .bashrc in CentOs to help manage my SSH Keys: /usr/bin/keychain --clear $HOME/.ssh/id_rsa source $HOME/.keychain/$HOSTNAME-sh So on SSH login I am prompted ...
1
vote
1answer
751 views

What is the default behavior of %install?

I am attempting to build an RPM using the -bb flag (%prep %build %install %check package). This is the output of the %install step: Executing(%install): /bin/sh -e /var/tmp/rpm-tmp.2kgeNY + umask 022 ...
1
vote
1answer
280 views

Get KERN_DEBUG messages into syslog on rhel7/centos7?

I've been trying to get KERN_DEBUG messages logged to a file in centos7, but have had no luck. I can get them just fine from "dmesg," but not /var/log/messages or /var/log/dmesg Here's a MWE kernel ...
1
vote
2answers
458 views

CONFIG_LOCALVERSION (CentOS 6.5)

I am in /boot as "root". I edit config-2.6.32-431.el6.x86_46 and added my name to CONFIG_LOCALVERSION="John" But when I type uname -r is just shows the version, but not my name at the end. Am I ...
1
vote
0answers
542 views

Datanode in slave isn't working : Hadoop in CentOS

We've created a Hadoop cluster of two machines following these instructions: http://tecadmin.net/set-up-hadoop-multi-node-cluster-on-centos-6/ with the machines set as follows: hadoop1 = master &...
3
votes
3answers
58 views

Where to turn first when out of free space on Cent OS Web Server?

I am a very new Systems Administrator. I have a Windows background and am now a Jr. Systems Admin working with Cent OS 5. Our web server runs Cent OS 5 and uses PHP/MySQL for our web applications. ...
2
votes
1answer
607 views

How do I determine if the linux password was changed?

I'm developing an application which is distributed on a VM. The default password is always the same, but it's hash in /etc/shadow changes with every release. How can I programmatically (e.g., from a ...
0
votes
1answer
1k views

What multimedia support should I use in centOS 7

I have recently installed Cent OS7. Its looks very nice at first. But soon realized it has a horrible multimedia support. Its own player cannot install the codecs it requires, which was much easier in ...
0
votes
1answer
173 views

Mounting Linux root fs NFS share on OS X?

I am attempting to share the root filesystem (/) of a CentOS 6.5 virtual machine to my OS X host system. While this should be relatively simple process, I'm hitting some kind of wall. Presently my ...
2
votes
1answer
410 views

autofs does not prompt for password when needed

I am trying to setup an automount point using autofs to mount a samba fileshare. I am using the following syntax in my auto.misc file mydir -fstype=cifs,rw,user=myusername ://server.domain/path/to/...
3
votes
1answer
402 views

How to get gnome to run /etc/gdm/PostSession/Default when using XRDP w/ VNC

I use Microsoft's Remote Desktop Client (mstsc.exe) to connect to a linux server with GNOME as my desktop. I've set up /etc/gdm/PostSession/Default to execute some steps on cleanup - which works when ...
5
votes
1answer
911 views

Transmission-daemon service spontaneously stops

I've installed, configured and ran transmission-daemon on my CentOS 6 machine using service transmission-daemon start This works nicely, and I can see the web interface on http://server.ip:9091 as ...
8
votes
3answers
20k views

What does eno mean in network interface name 'eno16777736' for CentOS 7 or RHEL 7?

Under consistent network device naming scheme, what does 'eno' stand for in network interface name 'eno16777736' for CentOS 7 or RHEL 7?
6
votes
3answers
7k views

find: File system loop detected

When I try to find a file using find -name "filename" I get an error that says: ./var/named/chroot/var/named' is part of the same file system loop as `./var/named' I ran the ls -ldi /var/named/...
1
vote
1answer
664 views

Mitigating BEAST Centos 6.5 Apache 2.2

I'm trying to get my system to pass a BEAST scan, it seems no matter what settings I use, an error is always returned stating that TLS 1.0 is enabled. I'm using Qualys SSL Labs to test Apache/2.2....
4
votes
2answers
12k views

Installing Epel repository on CentOS fails

This has been working on my vagrant vm for a few month without any issues. I didn't change anything, it has been vagrant up and vagrant destroy'd several times before with no problems. But now it ...
2
votes
1answer
645 views

lz4 Kernel Module in CentOS without recompiling

I just installed CentOS 7 on a vServer to play around with. Usually I use Debian. Since I had good results, I want to use zswap. I enabled it by putting zswap.enabled=1 zswap.compressor=lz4 in the ...
0
votes
0answers
58 views

After adding FORWARD NAT rules, cannot connect system eth0

I was trying to make bridge connection between wlan and eth on Centos.. I made Forward and NAT rules and then something wrong with System eth0 connection. It does not connect anymore.. Could you ...
0
votes
0answers
420 views

How to edit the “Internal Server Error” without redirecting to somewhere else?

On the web this is what I see: Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, ...
13
votes
1answer
21k views

Does yum's --enablerepo option only enable a repo for the current command?

Does yum's --enablerepo option only enable a repository for the duration of the current command? For example if the enabled setting in /etc/yum.repos.d/remi.repo file is set to 0 (disabled) and I ...
-1
votes
1answer
79 views

How to diagnose the problem when Apache at random times shows “Not Found” on the web?

Suppose I reload my web site 100 times by holding down Ctrl+R on my keyboard. I notice once in a while Apache throws out a Not Found error message. If I refresh again, everything works normal ...
1
vote
1answer
12k views

Error while loading shared libraries: libdl.so.2 (and others), no such file. Libraries exist

Attempting to install a Java application from a .bin file. When opening the installer from command line, I see these errors: [boxen]# ./ZendStudio-5_2_0.bin Preparing to install... Extracting the ...
2
votes
1answer
376 views

Automated Install Fails due to CRC on /dev/sda

I'm running an X8STI-3F with an onboard LSI 1063E SAS controller running in IT mode. I'm trying to get an automated install going on it and I keep getting ddf1: physical drives with CRC AE516B03, ...
2
votes
2answers
640 views

Can I configure error notifications on a specific cronjob entry to go to a different email address?

I have multiple cron job entries configured under a single account: 0 0 * * * /foo/foo.sh 0 2 * * * /foo/foo2.sh 0 4 * * * /foo/foo3.sh Right now, if any of these encounter an error, an email is ...