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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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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7 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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16 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
9 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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2k 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
235 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
41 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
163 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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14 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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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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17 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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40 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
650 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
4k 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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12 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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61 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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44 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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66 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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70 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
49 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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15 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
81 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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39 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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74 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
25 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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76 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
31 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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136 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
69 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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44 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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1answer
3k 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
481 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 ...
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3answers
130 views

Tuleap: Configuration of Bug Tracker report

I created a Bug Tracker and open different bugs. When I enter in my Bug Tracker, I see a web page with a search form in the upper part and a list with the different bugs in the lower part. However by ...
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3answers
653 views

How to install VLC media player in CentOS6?

I am using the CentOS, version 6, GNU/Linux distribution. I am in need to install VLC media player, what command i need to use at the terminal? I have tried yum install vlc.
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1answer
1k views

How to run something in background in Centos

I use CentOS and I have a little bit of difficulty with background tasks When something like updatedb command is running, I press CTRL+Z, instead of running in the background it immediately says ...
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1answer
146 views

How can I repair a totally corrupt rpm db on centos 6.4 with no backup?

I am looking for help in repairing my Centos 6.4 rpm db. I had a disk failure and the backup rpm i have is not working also. I have googled the request and have come up with many different solutions ...
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16 views

Email Server Synchronization

I have created a mail server with the domain name abc.example.com. All the mail is working locally without any issue. Now I need to synchronize the local email server with hosted mail server (I ...
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1answer
33 views

Replace local host file modification with remote. Proxy server or something else?

I need to find a solution for a problem described below (both servers running CentOS 6) My goal is to have visible website to the public where a client will type own domain name mydomain.com and then ...
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2answers
231 views

getting red alarm on dahdi show status command

I am trying to configure dahdi on my centos system by following this my system.conf # Autogenerated by /usr/sbin/dahdi_genconf on Sun Sep 21 16:06:45 2014 # If you edit this file and execute ...
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37 views

VNC server immedietly closes connection

So, I am attempting to use VNC over SSH via this method. However when I type the command vncviewer localhost:[port] I get the response vncviewer: VNC server closed connection. However, I do have ...
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2answers
2k views

Setting up FQDN in CentOS 6.3

I have a domain name: example.com. I am setting up my CentOS 6.3 server's FQDN, it used to be centos63min. Reading on the internet, I found a lot of examples, where people name the server something ...
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1answer
80 views

Samba same shared folder read only for guest and read write for @somegroup how to

I want users in group Audio to have read/write and all of the other users (guest, anonymous, everyone....) to be able to browse and read only access to the same share folder. Guest users cannot mount ...
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1answer
335 views

Samba 3.6.9 on CentOS 6.5 existing user unable to connect to new share

I've got a question about samba connectivity. I installed a minimal installation of CentOS 6.5 and have it as a member server of AD, as per this guide: ...
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1answer
49 views

bind 9 and multiple domain names

I have been told the following from someone after trying to get more than one domain name (zone) to work on the same BIND instance. We are able to get a single domain name "example.com" working but ...
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25 views

Webshpere 8.5 with deployment folder on Virtual Box shared folder cause an “Operation permitted” error

I have a Websphere 8.5 on Centos 6.5 and I changed deployment directory by changing ${APP_INSTALL_DIRECTORY}. New path is pointing to place in Virtual Box shared folder (so it's pointing to vboxsf ...
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43 views

rm -rf * results in “Killed”

I used PHP to generate about 4,000,000 files in a directory (f/) because I was bored. When I cd .. and use rm -rf f, it simply returns "Killed" about half a second later and does not delete the ...
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3answers
367 views

How to deduplicate 40TB of data?

I've inherited a research cluster with ~40TB of data across three filesystems. The data stretches back almost 15 years, and there are most likely a good amount of duplicates as researchers copy each ...
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1answer
19 views

Bind domain name to hosting CentOS

I own "YouPlus.biz" and I own hosting at 192.169.218.8 (goddady VSP) I have been trying to Bind youplus.biz to 192.169.218.8 but have had no luck. have tried: ...
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78 views

How to spilt a bootable linux distro iso file onto multiple dvds or cds?

I have customized a centOS distro , by including some packages such as VLC,eclipse etc. but now the size of distro exceeds 7.42 gb. I want to : split the large distro iso into multiple small iso ...
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379 views

legacy grub: updated menu.lst is not used

This is a CentOS 6.4 with all updates inside Virtualbox OSE (quite old version). All information below refers to the VM, I don't think there is any issue on the host. /boot is a separate ext2 fs on ...