CentOS is an abbreviation for Community Enterprise Operating System that aims to be compatible with its upstream source, Red Hat Enterprise Linux. CentOS 6 is the 6th major version of CentOS, which was released on July 10th, 2011.

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phpList is not showing Initialize Database Option

I just installed phpList on server. Also created mysql database. Now, I am opening it through ip-address/phplist/admin, It is showing just header. I can't see any option to Initialize Database. Soo, I ...
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10 views

Starting VNC server: no displays configured in CentOS6.0-64 Minimal

I have installed tigervnc-server on CentOS6.0-64 Minimal. I am using Putty for it. I have also added user. Now, after setting server configuration asVNCSERVERS="1:jeeten" VNCSERVERARGS[1]="-geometry ...
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1answer
83 views

Strange tgtd behavior: Multiple instances?

I'm trying to add a LUN to a running iSCSI target under CentOS 6.5. The iSCSI target is tgtd from the scsi-target-utils package. I'm seeing some pretty weird behavior and I’m a bit of a loss as to how ...
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46 views

Where does this name come from? root@<hostname>

When I putty into my CentOS 6 server I am shown root@ DemandStream Development This was a copied and repurposed Linux VM from one of our development environments. How do I change this name? It seems ...
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2answers
31 views

No package available when installing packages on CentOS 6.6

I wanted to install mysql-server on CentOS 6.6 (64bit). When I run yum install mysql-server, I get the following error: root@ip-50-62[/home/syn]# yum install mysql-server Loaded plugins: ...
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2answers
6k views

NIS failing on CentOS 6

Solved: See bottom. tl;dr: enable network manager. I'm trying to set up a CentOS6 system to login using NIS. I've set up the NISDOMAIN and for the files like passwd to be on the NIS server in ...
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1answer
35 views

Service Network Restart

I was configuring the network interface for the servers that are on Centos 6 platform. While editing the ifcfi-eth0 file there is a field "ONBOOT" which is set to "yes" if we want that the network ...
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354 views

Is my CentOS library multiarch? And what does that mean?

On CentOS release 6.4, I am trying to run a binary. However, it gives the following complaint: (...) requires "/lib/libuuid.so.1" to function. From a quick search, I can see that the only similar ...
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10 views

Unable to connect to internet from Centos VM

I am using VirtualBox 4.3, I have installed Centos 6.3. I have two adapters attached. 1) NAT 2) Host-Only I want to be able to setup a cluster of 3 machines which can talk to each other and also be ...
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2answers
35k views

Upgrading PHP 5.3.3 to 5.4.4 in CentOS 6.4

I'm using CentOS 6.4 (centos-release-6-4.el6.centos.10.x86_64). I'm trying to upgrade the php version from 5.3.3 to 5.4.4 by using: yum upgrade php-mysql php-devel php-gd php-pecl-memcache php-pspell ...
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16 views

Pure-FTPD certificate not being used

I am using Pure-FTPD from the epel repository on CentOS 6. Now I have configured to enable TLS which works fine however for some reason it wont make use of the certificate file I have placed in ...
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2answers
402 views

cannot connect centos (dell precision) laptop to 2 external monitors (but I can connect to 1 external monitor)

This is my first post here and hope I am following the rules of the forum. I reviewed Connecting 2 External Monitors to a Laptop? and confused with hardware terminology to figure out if my Dell ...
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2answers
3k views

How to mount nfs using automounter(autofs)

I have an nfs at 192.168.1.10:/home/vm1/Desktop/nfs and will like to mount locally to /home/vm1/Desktop/nfs-mount using automounter...need help doing do What i did $cat /etc/auto.master /home ...
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1answer
185 views

Making SSH connection to Centos 6.5 VM takes ages

I installed Centos 6.5 in a Virtual Box VM. Everything works smooth, except for SSH logins. It takes ages for the command prompt to display. With some verbosity added: debug2: kex_derive_keys ...
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2answers
3k views

iptables rules for nfs

I was getting below error while typing showmount -e 192.168.56.2 in client machine [root@client ~]# showmount -e 192.168.56.2 clnt_create: RPC: Port mapper failure - Unable to receive: errno 113 (No ...
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1answer
207 views

Linux ALSA: No sound out from internal speaker

There is no audio output when running "Test Speakers" in Sound Preferences -> Hardware -> pcsp. The internal speaker worked fine under Windows. Sound can, however, be heard when headphones or a ...
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33 views

How to install hugin on cent os 6.5?

Trying the whole day to run hugin on centos? Thought I could use fedora repos, but I had no success. Anyone experience with that?
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1answer
32 views

Memory usage grouped by parent process

How can I find the total memory usage of all processes (including child processes) with PPID of 1. For a program like nginx/httpd which forks several child processes, ps/top gives the memory usage of ...
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3answers
4k views

How can I manually control a fan from the terminal?

I'm trying to control the fan speed on my desktop, and I'd appreciate your help. Goal: Use a script to control the fan speed on my computer. Motivation: The embedded BIOS "Smart Fan" settings isn't ...
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1answer
28 views

What is the effect of Service Network Restart

In network configuration file ifcfg-eth0 . There is a field "onboot" if I put onboot=no and restart the service network. Then interface eth0 did not up. If I put onboot=yes it does up the interface ...
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1answer
76 views

Making 2.7.3 default version of python on CentOS 6

I want to execute python from php and I do have a script that works fine for default python interpreter. I have centos with default python 2.6.6 which is installed at /usr/bin/python and python 2.7.3 ...
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1answer
377 views

Input/output error reading file

I have a file that is 6.6GB, it just so happens to be a video file, and I'm trying to copy it to an external drive since its quite important for me to keep, however when I try copying it whether with ...
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9 views

Centos 6.4 didn't display properly

I installed Centos on my computer. Everytime I work for a while, the characters began to disappear. I tried open a tab, Vim, Gedit,... There was just a blanck white windown pop up. I don't understand ...
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66 views

Centos6.5 can't use serial console but can see serial output messages during boot up

I configure CentOS 6.5 x86_64 version to support serial console. I edit configuration files as many people suggest. In GRUB, Add these two lines: serial --unit=0 --speed=115200 terminal --timeout=5 ...
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1answer
31 views

“kdb5_util create” fails with an error

krb5-server 1.10.3-33.el6 on CentOS 6.5. I'm following the Red Hat KDC Instructions. Right there at the start, the instructions give me /usr/sbin/kdb5_util create -s. If I run that, I get this: # ...
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1answer
258 views

yum install gcc fails with invalid linux.dropbox.com/fedora directory

I am relatively new to Linux administration. I have installed Centos 6.5 (under VirtualBox on a Win7pro system). When I try to install gcc to the system using yum, I get the following results: ...
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1answer
42 views

red 5 recorder app set up

Does anyone know how to set up this Red5 Recorder application on Red5 1 RC2 for Linux CentOS 6.4? I followed set up of WEB-INF folder from this document http://fms.denniehoopingarner.com/newapp.html ...
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2answers
227 views

Permission denied error when accessing email folder even when logged in as root

I have a box with iredmail installed in CentoOS 6.4. When trying to access the vmail1 folder, which is the storage path for emails, It get the following: [root@mx vmail]# dir -ls total 12 4 ...
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83 views

Find issues in PHP site hosted under Nginx and PHP-FPM, no log error

I'm setting up a Wordpress site under Nginx 1.6.2 + PHP-FPM (PHP 5.5.18). This is the configuration for WP site: server { root /var/www/html/jurisprudencia.dev; index index.php ...
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54 views

How to enable php extention in centOS 6.5 with php 5.5

I have installed ffmpeg extension using this tutorial in Cent OS 6.5 with PHP 5.5. When I check with # ffmpeg command in terminal. it shows me following output ffmpeg version 2.2.1 Copyright (c) ...
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131 views

Not able to install rvm on centos 6.6

I am trying to install rvm on centos 6.6 using below commands. curl -L get.rvm.io | bash -s stable It throws an error as below bash: line 1: syntax error near unexpected token `<' 'ash: line 1: ...
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1answer
693 views

Installing Oracle 12c on CentOs 6.4

I need to install Oracle DB 12c on Centos 6.5/6.4 that has no GUI (or xserver) installed, Is there a way to do it? Can you point me to a manual? Thanks
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2answers
6k views

CentOS: View all users in a specific group

I added a user user01 to a group group01 using: usermod -a -G group01 user01 When I run in command id user01 it shows that this user has actually been added to the group. However, the file ...
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20 views

Centos Flashing cursor on boot

I have installed centos 6 on my machine. I did changed file permissions in root recursively using below command. $ chmod -R 2750 / Now when I did logout, progress bar appeared and it didn't stop. ...
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102 views

Centos install using KVM stuck on trying to access install.img

Greeting Folks, I am trying to install Guest or DOMU on a remote server and every time I try is get stuck at Retrieving /install.img. I believe its a network setting but am not entrely sure. Here is ...
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2answers
47 views

Clone Entire OS over SSH

I have a CENTOS server that was recently compromised. However, I used to be friendly with a professor who taught computer security, and I would like to give this person a chance to go over the old ...
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2answers
94 views

Where can I get Centos 6.5?

I am deploying a product for my department which calls for CentOS 6.5. When I browse the CentOS downloads, I am only seeing 6.6 available with no means of finding 6.5. Our vendors have only stated ...
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1answer
91 views

Cloned Linux does not recognize the new flash drive's space?

I installed CentOS 6 into my 4GB flash drive, and everything worked fine until I needed more space. I have another flash drive with 8GB of space (which is all I really need) and so I formatted it with ...
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1answer
159 views

Why won't mysqld start after a yum update?

This morning I ran yum update and it completed successfully. We noticed, however, that the database server wasn't running. As root, I ran: service mysqld restart Which gave me the following error: ...
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23 views

CentOS 6 with User Permission (Read at message)

I have create users on CentOS 6 between test1 and test2 so I login on user test1 on ssh and i tried to access home dir of test2 so why it can access? how i can setting for other users can't access ...
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2answers
307 views

CentOS: install software using text UI

I've downloaded CentOS-6.6-i386-minimal.iso (because the DVD images are too large for my narrow internet access. How can I install software (e.g. Gnome desktop) now from the console? Is there ...
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143 views

MySQL stops unexpectedly on CentOS 6.5 with WHM/Cpanel after migrating server with transfer tool

I recently moved my entire websites from a dedicated CentOS5 server to a CentOS 6.5 on Amazon EC2 with the same cPanel/WHM version. WHM 11.44.1 (build 19) However after angry calls from clients I ...
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121 views

Correct crontab settings on Cpanel/WHM Cron on CentOS 6.5

I have recently migrated from collocation to Amazon EC2 and setup new WHM installs with CentOS 6.5 I then used the Transfer tool to move all websites to the new server, however I am trying to transfer ...
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1answer
42 views

I can't see apache, nginx process while using “top” command

As the title said: "I can't see apache or nginx process while I'm using top command" I'm using CentOS 6.5 and of course I already installed it on my server. I run them as a service by using these ...
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156 views

How can CentOS 6 use python 2.6 with anaconda (python 2.7) installed?

I am using CentOS 6 and it uses python 2.6 by default. Recently, I install anaconda package with python 2.7 to work with scikit-learn, but now some packages that my OS uses are not available to it. I ...
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1answer
36 views

Why the used disk space increases after yum update?

If I do a yum update on a fresh CentOS 6.5 image, its disk usage increases by 200 MB. The image is a custom AWS image built some 6 months ago. The base image is almost barebones and takes around 1GB. ...
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1answer
303 views

Unable to read package metadata on Centos 6 PXE install

A Centos6 pxe install is not running correctly due to error: Unable to read package metadata. Cannot retrieve repository metadata (repomd.xml) for repository: Centos6-os. However from examining the ...
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1answer
74 views

Change order of two-factor-authentication

I am testing two-factor-authentication for ssh logins on some CentOS containers in our testing environment. I compiled my own rpms from github's source, installed and configured everything and have ...
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1answer
4k views

Mirror repository won't work (The requested URL returned error: 403 Forbidden)

I'm trying to find out why I still get the 403 when running the yum install command. I have created a repository mirror which can be read from remote machines. Do you have any suggestions? I have ...
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3answers
613 views

semanage command not changing file context

I am trying to change selinux context for upload directory to enable anonymous upload. This is the Directory path /var/ftp/upload This is the default context [root@server ftp]# ls -Z upload ...