CentOS is an Enterprise-class Linux Distribution derived from Redhat Enterprise Linux sources freely provided to the public.

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824 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
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1answer
118 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 ...
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1answer
929 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 ...
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2answers
164 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 ...
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1answer
182 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 ...
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0answers
428 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 ...
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0answers
270 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
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2answers
402 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 ...
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0answers
236 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 ...
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3answers
2k 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 ...
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1answer
42 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 ...
2
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1answer
614 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 ...
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1answer
3k 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 ...
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0answers
140 views

Reinstalling Centos 6.4 over current Centos 6.4 OS

I am a newbie to Linux, and I am trying to reinstall Centos 6.4 from an AsteriskNOW CD I have because through an update I believe I lost the res_srtp.so module I installed from an external source. I ...
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1answer
3k 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
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1answer
75 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 ...
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1answer
279 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 ...
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0answers
123 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 ...
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0answers
99 views

CentOS 7 gnome Version Network issue

I just installed Cent-OS 7 with GUI Interface, but now I am logging in but I can not connect to network, in virtual machine I see it's connect with bridge (VMware) but I cannot connect to network, I ...
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2answers
248 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 ...
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0answers
174 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 ...
2
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2answers
44 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
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1answer
125 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 ...
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1answer
779 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 ...
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1answer
109 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
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1answer
109 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 ...
3
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1answer
180 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 ...
4
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1answer
470 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 ...
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4answers
4k 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?
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0answers
415 views

What are the steps needed to get Redhat/Centos 7 to boot from an mdadm RAID?

I've spent a day on this. Figured it was time to ask. In the end I couldn't get around "Bad magic number in super-block ..." On an average install, my sda exits setup as an EFI. I'm cool with that ...
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2answers
2k 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 ...
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1answer
192 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 ...
3
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2answers
6k 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
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1answer
256 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 ...
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0answers
108 views

IPSet - After installing get error message “Broken error report message received”

I get an error message after installation when I try to use ipset. "Broken error report message received". I am wondering what the cause of the issue is, may be some linux guru could point me into the ...
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0answers
81 views

Extensions “grayed out” on extensions.gnome.org

The site extensions.gnome.org loads OK, but all of the extensions appear to be "grayed out" (reduced opacity) as though they are not available. At the top of the site, I have "current version" ...
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0answers
39 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 ...
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0answers
113 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, ...
8
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1answer
5k 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 ...
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0answers
234 views

Gnome 3 with multiple X Screens

Background I'm running Gnome 3 with three separate X Screens using the proprietary NVIDIA driver with Xinerama disabled in xorg.conf. (because Eclipse works better with it disabled) There is only ...
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1answer
49 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
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1answer
5k 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
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1answer
170 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
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2answers
447 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 ...
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1answer
33 views

How to edit all Apache's error codes DIRECTLY instead of using httpd.conf?

When a page does not exist.. this is what i see on the web : Not Found The requested URL /test was not found on this server. i know about : ErrorDocument 404 /test.html but i rather not use ...
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2answers
173 views

make an application startup automatically

I'm new to linux. Here I have an application deployed to linux, I want the app to startup automatically when the linux start up. I'm using an command like 'sudo ./start' to start the application. How ...
5
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3answers
3k views

How to disable beep sound in Linux CentOS 7 command line? [duplicate]

I just installed the basic Linux CentOS 7 (no desktop) and am experimenting with the system. Every time I make a mistake (entering things that the command line doesn't like), the computer beeps and ...
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0answers
40 views

How to use scanner drivers api in Linux shell script

Usually when scanning any page using Canon DR- 2050C scanner in windows it rotates vertical text paged to horizontal automatically for the easy reading of the user. In Linux we are manually scanning ...
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0answers
15 views

How to increase horizontal and vertical default spacing between icons on desktop at EL6

I have installed centos 6.5, by default icons are appearing very near to each other on desktop. From where I can increase space between them? Any clue? Which file is recommended to modify manually, ...
2
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1answer
329 views

rpm temp file question (rpm-tmp)

When installing an RPM on CentOS, I receive the following error message: /var/tmp/rpm-tmp.44492: line 578: [: too many arguments The trouble I'm having is that /var/tmp/rpm-tmp.xxxxx file is always ...