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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Disable Sendmail from rescue mode CentOS 6 Virtual Server

Hello we rent a virtual server of 1and1 CentOS 6 with Parallels Plesk Panel 12 (64-bit) they have put it into rescue mode as it was "found to be part of a network of compromised machines leading a ...
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13 views

g++ 4.9.2 in Cent OS 6.7 will compile but not link

I am using Centos 6.7 and have installed the devtools-3 distribution and "enabled" it to make gcc 4.9.2 the default. A simple C++ program that uses regex will compile , but does not link. // ...
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12 views

Errors in script which runs on boot

I have made an installer script of my architecture which runs on boot, and I added it to chkconfig: #!/bin/bash # # chkconfig: 2345 99 30 # description: Product Installer Service # if [ -f ...
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20 views

One user, multiple desktops tigerVNC

I was wondering if there was a way to "share" a user through tigervnc such that if both are logged in, both see their own desktops. I need something similar to screen in ssh. I've tried connecting ...
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7 views

How to migrate symbolic links from two folders?

I made a backup of "zimbra ce" rsync but I just realized that you have not copied symbolic links. I have a clean installation zimbra in /opt/zimbra/ and backup in /opt/zimbra_old/, how I can copy all ...
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1answer
52 views

cpuinfo shows 40 vcores on 10 core processros

Recently I procured a machine with Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz with 128GB RAM running CentOS 6.7. The specs in Intel web site show that this processor has 10 cores (20 hyper threaded ...
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14 views

Directory access not permitted

I recently installed the Open Virtual Desktop (Community Edition) on CentOS 6.6. I tried to open the folder created for a particular session. When the session was logged in, the folder could be ...
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16 views

How can I get the entry of some commands in .bash_history through a script in centos?

writing a python script to generate commands is working and the commands are getting executed in bash, but they are not getting entered in .bash_history.What should I do so that those commands are ...
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40 views

VMware - CentOS 6.5 Static IP Addresses

I installed CentOS 6.5 On VMware Workstation With a static IP Addresses but I'm not able to use Internet connection!! I applied all the steps performed in this post (From the official CentOS ...
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1answer
36 views

Install CentOS 6.7 guest without internet connection via console?

I have problems installing a kvm guest CentOS over ssh on a server without internet. This is what I do: fallocate -l 200G /var/lib/libvirt/images/dbpvvtlzg.img virt-install \ --accelerate \ ...
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2answers
85 views

Prevent uninstalling phpmyadmin when uninstalling php

I have a centos 6 server and i want to upgrade my php version from 5.4 to 5.5 but as far as i know i need to uninstall version 5.4 first (most guides say so at least), when i type yum remove ...
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48 views

How to set domain name in CentOS 6.6.

I am using CentOS 6.6 This is my /etc/sysconfig/network file NETWORKING=yes HOSTNAME=rahul This is my /etc/hosts file entry 172.16.11.222 rahul.example.com rahul If I type hostname I ...
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45 views

How to find files modified in last 24 hr but do not find from hidden directories and sum them

I have following command to find files modified in last 24 hr and sum all of them. #!/bin/bash find /mnt/naspath -mtime 0 -print0 | du --files0-from=- -hc | tail -n1 >> /tmp/size.log exit 0 ...
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2answers
136 views

Is my Port 3838 Open based on this netstat -tulpn?

I am trying to host a Shiny R Web Server on a CentOS Virtual Machine. I am troubleshooting some networking issues, but I want to confirm that the port is open. I have a Static IP address for this ...
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58 views

ifcfg-eth0 not being recognized after network restart

I am trying to configure a Bridged connection on a Centos 6.7 Virtual Machine, on a Windows 7 host. I have a static IP and a MAC Address for the host ethernet adapter (as shown in eth0). I have an ...
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11 views

How to migrate e-mail accounts from one server to other

I have copied the content of /home/username/mail folder from one server to the other (source is Centos 5 and target is Centos 6). Then I tried to list the e-mail accounts and the list appears empty. I ...
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34 views

Website is slower in AWS - Compare Memory from AWS to Old Server (Parallels)

I just migrated a website from an old server to an AWS Instance. The website is slower in AWS than it was in the old server. I ran a top command from both servers and I got: Parallels old server: ...
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28 views

Clipboard Stopped Working: Centos 6

I have a client in my office that's running CentOS 6.x that's experienced a curious GUI malfunction. Basically the clipboard has stopped accepting output system wide. For example in Gedit "ctrl+C" ...
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74 views

Hosting a Server on a CentOS Virtual Machine - Bridged Connection?

I have a Virtual Machine (VMWare) running CentOS 6.7. I am looking to host a Shiny Server for R, with which I am deploying a Web Application on my corporate network. I think that I need a Static ...
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35 views

How do I allow incoming TCP Traffic on a Port in CentOS 6.7?

I am trying to configure a R Shiny Server on CentOS 6.7, and I need to allow incoming TCP traffic on Port 3838. I am new to Linux and was wondering how I can modify my settings to allow incoming ...
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19 views

How to add a disk

I would like to start to use a disk: /dev/sda (see bellow). What do I need to do before I could copy files on it? (centos 6) # fdisk -l Disk /dev/sda: 1030.8 GB, 1030792151040 bytes 255 heads, 63 ...
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28 views

AWS EC2 Disk not installed

Using Amazon EC2 instance and I have a running CentOS 6.5. I recently went to exchange the disc from the machine. did the procedure turn off the machine to a snapshot of the old drive and climb a new ...
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16 views

Request Tracker on linux gives CLOSE_WAIT

Hi I have an RT installation on CentOs 6.7 and RT 4.0, I can log in and all, but after a while I am seeing CLOSE_WAIT socket is created for each selection that I make on the dashboard. Eventually the ...
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125 views

Cent Os minimal installation with Fingerprint Athuntication and Fluxbox

I just installed CentOS 7 minimal with fluxbox. I want to have fingerprint authentication to login into my os. Can anyone provide me steps to do it.
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36 views

bash prompt change after user default directory change

There is something I am not understanding. I have used the method found here about changing user default directory using vipw /etc/passwd However once I go into this file and change a user default ...
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1answer
27 views

Make a file drop immutable, linux

I'm trying to install a custombuild on my VPS. I got the file on it but the only problem is that I can't execute it. When I execute it an error message appears; "Cannot open: Permission denied". The ...
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89 views

kernel(security_netlink_recv) = 0x3a2204c6 is needed

I am trying to install drbd (packages are fetched from elrepo). Both drbd and kmod-drbd are version 8.4.3-1 and I am using CentOS 6.7 with kernel version 2.6.32-573.el6.x86_64. When trying to ...
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40 views

Command for finding and replacing directories

I was wondering: Is it possible to find specific directories and replace the whole directory with a newer version of the directory. It’s about mass updating WordPress Templates, let’s say we have ...
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18 views

Multi-user ftp configuration issue

I have a server running centos 6.5 and proftpd. There is already a user "master.admin" created, thus having his own home directory (/home/master.admin). Now, I want to add client users -for example: ...
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148 views

Wildcard IP addresses for an iSCSI target initiator-address doesn’t seem to work on CentOS 6

In /etc/tgt/targets.conf wildcard (172.16.2.*) not work with initiator-address. I'm preparing for Red Hat High Availability Clustering exam (EX436). The student workbook says: With tgtadm ...
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175 views

How do I get an RPM .spec file from FPM (Effing Package Management)?

I have made a package with Effing Package Management on CentOS 6, and sent people the fpm... stuff to generate it. It looks like some of these people I trust would like to see a .spec file, too. I ...
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51 views

Safe backup/restore of Linux partitions from a Windows system

I have a dual boot laptop, that contains a Linux CentOS 6 partition and a separate Microsoft Windows 7 partition. The Linux partition is not letting me access to its GUI anymore, so I'll have to ...
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20 views

Tuleap - Very long response time

We observe very long repsonse time ( ~ 1 minute) in our installation of Tuleap on the configuration as follow : Tuleap version = 8.3.99.4 OS = Centos 6.6 VM : FLex'server 4 cores, 4 Gb ram. We ...
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148 views

External HDD Could not be Mount in Centos

I have an Transcend HDD in NTFS file system. By mistake I unmount it from centos. After this i am not able to connect it again. Now it is not showing icon for it. Please help me, how to again mount ...
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1answer
257 views

Unable to enable libvpx library in ffmpeg from command line

This is my first question I have asked on superuser, so please be patient with my ignorance if it should surface. I have spent hours and hours trying to figure this one out and would greatly ...
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125 views

Openwrt And CoovaChilli

Can anybody tell me how to install CoovaChilli 1.3.0 on my router. Im using Router Model :Media-Tek MT7620A Evaluation Board Firmware version :OpenWrt Attitude Adjustment 12.09.1/LuCI ...
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34 views

CentOS - Mouse and keyboad do not work after deleting /var/cache

My mouse and keyboard do not work anymore in CentOS 6.5 after I deleted /var/cache and restarted my PC.
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338 views

wget through proxy in virtual box (cloudera quickstart VM - Cent OS)

I have installed the Cloudera Quickstart VM 5.3.0 running on virtual box for windows 7 and I would like to run a wget command but I have troubles with my company proxy (which needs authentification). ...
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1answer
158 views

Joomla says it's missing native ZIP support on CentOS 6.6

I am trying to set up a Joomla site and on a new dedicated server running CentOS 6.6. When installing Joomla, it is asking for "Native Zip Support" which is showing as "off" during the install. I ...
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99 views

Cannot SSH to localhost without password

First off, I want to say that I've tried everything in this question here, and it didn't help me: How to SSH to localhost without password? I had a file permissions issue recently because I don't ...
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1answer
111 views

IP address appears instead of hostname on LAN to network router

In the CentOS 6 servers the hostname command displays the name, but in the "PC NAME" field in the Actiontech router it displays the IP address. How can I make sure the CentOS servers are communicating ...
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1answer
362 views

dns forwarding for specific zone not working - bind

In bind we created specific zone and got set a forward options, but it fails to resolve. Details as follow, For mydomain.com dns working fine. but we use developer site called mydomain.com.dev we ...
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803 views

How to install GLIBC_2.15 and GLIBCXX_3.4.20 on centos 6.6 ?How to setup YCM?

Recently I'm trying to setup YCM on system of centos 6.6,however the system doesn't provide gcc of version high enough to support the work of clang.It is quite a trouble for me to update the gcc,more ...
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689 views

Upgrading glibc in centos 6.6

My server is using glibc-2.12.x. when I install certain packages it gives an error.Dependency not found glibc-2.14 or above is required.When I try using yum install glibc* it says server is already ...
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1answer
198 views

How to chown file to containing folders owner

How would you go to chown a file to the containing folder's owner lets say I moved a file from /home/userA/folder/abc.bin towards: /home/userB/finalfolder/abc.bin How can I chown abc.bin ...
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1k views

How to install wxpython on centos 6.5 (python 2.7)?

I've updated python on my centos to 2.7 and installed wxpython via: yum install python-wx Unfortunately python can't find the library and I get an error: ImportError: No module named wx Did I ...
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1answer
1k views

mongod start failed (monogdb 3.0.2, database storageEngine-wiredTiger)

I was using mongodb for a month yesterday morning after unusual shutdown my mongodb is failing to start. Here I am using wiredTiger Storage Engine, I think the wiredTiger.wt file got corrupted but I ...
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264 views

Can not ping the Router in GNS3 via vmnet1

I have installed GNS3 on CentOS6.2. And on GNS3, f0/0 of c3725 connects to CentOS6.2 via vmnet1. I mannually assign 2001:cafe::1/64 to f0/0 of c3725 while I assign 2001:cafe::2/64 to vmnet1. Here ...
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23 views

How to troubleshoot marketing e-mail inbox rate / deliverability?

After previously using managed ESP's, we've recently switched over to our own server (CentOS 6) that's set up to send bulk e-mails with 12 IPs/SPF/DKIM. Campaigns are processed and sent via ...
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424 views

Setup default PHP version in Plesk 12

I've just setup a Plesk 12 CentOS6 vServer. I installed some PHP-versions like 5.4, 5.5 and 5.6. The customers can change the running PHP version in the interface. All is working fine, but I have one ...