CentOS stands for Community ENTerprise Operating System, the most popular Linux distribution for web servers with almost 30% of all servers using it. Third-party software is not included in the base.

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Cpanel/WHM not working

Everything work fine, suddenly today afternoon Both cpanel and WHM stop working. But still the website and SSH work fine, But i am unable to open cpanel or whm, when i opening using IP ...
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1answer
4 views

CentOS 6.7 configure: error: dlopen not found

I'm trying to configure LibreOffice On-Line WebSocket server before installing but the following error is thrown: configure: error: dlopen not found Full output: [root@SBX-EXT-001-002 loolwsd]# ...
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1answer
13 views

Where is the email address for maillog set?

I've got a CentOS 6.7 system that currently emails a certain address to send system messages (for example, it emailed with the body "Terminated" to indicate a process spawned by cron that was killed ...
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1answer
4k views

Install CentOS on top of Ubuntu (dual boot)

I have a Ubuntu desktop and would like to install CentOS on top of it as a dual boot. The machine has two drives, each with one partition. I don't want to risk harming my Ubuntu installation. I'd ...
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5 views

How do I setup a tmux session to always use a particular scl?

I'd like to be able to setup a tmux session that more or less transparently runs everything in a particular scl environment, specifically scl enable python27 .... By transparently, I mean that when I ...
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1answer
4k views

Installing Cisco AnyConnect on CentOS 7

I have installed Cisco AnyConnect on CentOS 7. When I try to connect I get an error: /opt/cisco/anyconnect/bin/vpndownloader: error while loading shared libraries: libpangox-1.0.so.0: cannot open ...
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1answer
58 views

Security regarding nginx + php on CentOS 7 with OwnCloud 9

I'm trying to setup a OwnCloud Server v9 for my freelancing purpose. SPECS: - CentOS 7 - nginx - php I'm a little bit confused. I can find only the info about the PHP Version 5.5 in the ownCloud ...
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1answer
3k views

Failing to start Postgres SQL Server on Centos

I just followed this tutorial: http://www.unixmen.com/postgresql-9-4-released-install-centos-7/ But I can't start my postgres sserver on my centOS 6.5 machine. Here's the error: [root@vm5 ~]# ...
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21 views

Virtual Box Cent OS can't highlight mouse in desktop issues

I am using CenotOS under the VirtualBox, I started to have this problem with the mouse, right or left click does not work on the workstation(desktop?). It started with the clicking not working in my ...
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432 views

Failed to adjust OOM score of renderer with pid X: Permission denied

I'm not sure what exactly causing, but I'm getting following error: Apr 11 12:30:00 X alacarte-made-2.desktop: [1712:1735:0411/123000:ERROR:zygote_host_impl_linux.cc(162)] Failed to adjust OOM score ...
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1answer
24 views

Windows 7 host, CentOS guest - internet connection

I have troubles connecting a CentOS guest on Virtualbox running on a Win 7 host. The host has been given two adapters: Host-only and NAT. ip a vi 03 Note: setting GATEWAY=10.0.2.2 still results ...
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1answer
15 views

Apache on VM is not reachable from LAN

I have a CentOS machine installed on VMware Fusion and connected to my LAN through a bridge connection. Everything works fine, I can Surf on internet from the guest machine. Ping other network ...
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2answers
6k views

Unable to use yum on CentOS 7

I have install CentOS 7 on hyper-v successfully, but when I try to update using yum update or try to install using the yum command I have the below error: Loaded plugins: fastestmirror, langpacks ...
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9 views

VLC in Centos6 fails to play DVD

I installed vlc into my Centos 6.7 from epel and nux-dextop using these instructions. Install went OK but there are problems in playing DVDs. I managed to play a DVD containing material I recorded ...
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4 views

Previous system statistics from sar are dated a month earlier

I am trying to use sar to look at the statistics from yesterday (March 9th): $ sar -f /var/log/sa/sa09 Linux 2.6.32-431.el6.x86_64 ([hostname]) 02/09/2016 _x86_64_ (12 CPU) I wonder why the ...
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2answers
5k views

How to access shared folder between CentOS 6 and WinXP under vmware player 4

Based on Sharing Files between CentOS 6 and Windows Systems with Samba I am able to follow until section of "Accessing Samba Shares". however, my system is WinXP and I don't see CentOS 6 icon at all. ...
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1answer
268 views

Install rpm packages using file globbing with errors

I found a rpm feature. If you rpm install * and one of the packages fails to install then none of the remaining packages will be installed. Does anyone know how to use rpm to install packages with ...
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8 views

ClouderaVM in 2 Different Machines are not Pinging Each Other

I am using cloudera-quickstart-vm (VirtualBox) in 2 different systems with bridged mode of networking to implement hdfs (in a distributed manner). Host System: Windows 7 Guest OS: CentOS 6.5 ...
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67 views

Could not find debuginfo for main pkg: blas-3.2.1-4.el6.x86_64

I'm trying to use gdb with my code, but it's giving me an error: Missing separate debuginfos, use: debuginfo-install blas-3.2.1-4.el6.x86_64 libtool-ltdl-2.2.6-15.5.el6.x86_64 Trying to install the ...
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2answers
48 views

Error SSH to a Centos 7 VM (Host-only)

I have the following setup: Host System: Debian Wheezy VirtualBox System: Centos 7 Network Adapters: NAT and Host-only On the host system I can "ping" the VM machine, when I try to ssh I get the ...
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1answer
132 views

How can I set up remote capturing in Wireshark, capturing from a CentOS server on my Windows laptop?

I'm looking to capture packets from a remote server network interface. The remote server is running CentOS and has tshark installed. I'm working on a Windows 8 machine with Wireshark installed. ...
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4 views

Virtual memory size same Python application on Centos 7 and RH 5.2

Is there a reason why the same python app and code consumes about 90MB of virtual memory size in Red Hat 5.2 32bits python 2.4 and abut 300MB in Centos 7 64 bits with python 2.7? Both app's versions ...
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1answer
6k views

With Centos 7 as a Virtualbox guest on a Mac Host, how can I change the screen resolution of the console / command line?

I am using the minimum install of CentOS 7 with command line access only (no graphic support installed). After spending hours reading online about editing grub files, installing guest additions, and ...
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34 views

Hyper-V 2012 R2 different disk speed on CentOS and Debian

I found unexplained difference between running CetOS 7.1 and Debian 8.3 on Hyper-V 2012 R2. I create similar VM on similar hardware. Both virtual machines installed on 600 GB SAS 15K in RAID0 via ...
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1answer
12 views

Centos Sftp Ssh - How always create files with rwx-rwx-r-x and always owned by a certain group

I have a user myuser, which is only allowed to connect to ssh via sftp. I'd like this user to always create files with rwx-rwx-r-x and always owned by the group apache. I've tried to accomplish the ...
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1answer
24 views

centos login in the first time

I'm a beginner to play Linux. And I've installed Centos into the VMware. However, after I set the settings, the windows run the all black window and ask me to login. Of course, I key my account and ...
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3answers
6k views

Cant get squid proxy to work

i need squid proxy on my centos server. But i just can't get it to work. I did yum install squid. Here is my squid.conf file (i removed all comments): acl all src 0.0.0.0/0.0.0.0 acl manager proto ...
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2answers
25 views

Centos - PhpMyAdmin showing blank screen

I have just installed PhpMyAdmin, and when i try to access it it just shows a blank screen. I suspected this is because i followed a tutorial on how to secure php and disabled multiple settings, so i ...
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11 views

Customize telnet login

I'm trying to customize the login screen on my CentOS server but I can't for the life of me, figure out how to change the actual login prompt, when the system asks the user for a login name. I want to ...
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508 views

Dual-display with Dell E7440, docking station, and CentOS

Hardware: I have a company-issued laptop (Dell E7440) on which I have installed CentOS 7; 2 Dell monitors which support VGA, DisplayPort, and DVI; and a Dell docking station for the laptop ...
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9 views

Taking a 'snapshot' of centos 7

So I am trying to basically move all my settings/files on my Centos 7 server elsewhere. But I am unsure as to how should go about this. I researched on what I should do, and I came across a digital ...
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2answers
3k views

Creating a USB stick for installing centos 6.x using DVD1 and DVD2 iso files

First, we create 2 partitions on the USB stick that is let's say 16GB. first partition is let's say only 1GB and the second partition is the rest of what is available. after we "w" write the ...
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2answers
5k views

Desktop not starting after Centos upgrade

I upgraded a server from centos 6.5 (with gnome2) to 7 using the update manager. The problem is that I am not able to see the login screen or the desktop. However the mouse pointer is visible. I ...
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2answers
81 views

Why is a user only added to one group at a time?

I have a limited knowledge of Linux systems, so bare with me :) I'm trying to add Apache and a user called admin to the same group on CentOS. When I run id admin I get groups 1000 (apache) and group ...
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1answer
40 views

Cannot restart apache on Centos 7

I cannot restart HTTPD on Centos 7. When I try to run the command it shows this error below. How can I overcome this? -- -- Unit session-735.scope has begun starting up. Apr 12 15:33:01 ...
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21 views

Telnet script without logging in

first of all I'm new here, so I apologize if I make any mistakes. So I wrote a python script to check a database for some information and I would like to make it publicly available through Telnet. ...
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1answer
22 views

copying ssh id from debian to centos times out, how to debug?

I'm setting up another pc on my network. it will eventually be headless. It currently boots into the centos CLI ~ which is fine. now i want to copy over my ssh rsa key from my main debian pc to the ...
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1answer
32 views

I can Telnet into a Linux CentOS system but cannot SSH into it. My colleagues say they can SSH into it

My company has a server (server A) in a data center belonging to a telecoms company. The server has no access from the internet. I need to access this server because of a server application that I am ...
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0answers
10 views

How do I create a Docker container with a non-default IP address?

I created a docker container with this command: docker run -p x.x.x.x:80:8080 <imageName> bash where x.x.x.x was the IP address of the Docker server running CentOS version 7. I then tried to ...
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1answer
7 views

ipset -j SET --add-set notwroking in cetos

I recently installed ipset rpm and kmod-ipset rpm for my Centos (Linux 2.6.18-194.11.3.el5 i686) and try to hands with help of some examples from internet, but when I try to ban user who tries to ...
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1answer
240 views

CentOS 7 as guest in VMWare: can't drag and drop, can't copy and paste

I have installed CentOS 7 as a guest under VMWare Workstation 7 on a Windows 7 host, and the problem is that I can't drag and drop files, nor copy and paste. VMWare's documentation has the following: ...
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2answers
12k views

Version `GLIBCXX_3.4.15' not found in CentOS (in file /usr/lib/libstdc++.so.6)

I try to use a program and I get the following error. /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.15' not found Under /usr/lib64 the libstdc++ I see is libstdc++.so.6.0.13 (and a soft link). ...
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How to fix Nemo file explorer as crashes frequently in Linux and asks for root privileges to fix the error?

I have Nemo installed on Centos and Fedora, on Gnome classic and Mate Desktop, crashing every now and then and asking for root privileges to fix the issues found but other explorers work just fine. I ...
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5answers
45k views

How to stop kernel messages from flooding my console?

I'm using Centos 6, rsyslog logging. Console is flooded with kernel messages. Klogd is not running (I'm using rsyslog) Rsyslog config does not direct anything to the console Even tried stopping ...
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2answers
69 views

Connection refused when trying to SSH. But port 22 is not blocked. Pings work

Connection refused when trying to SSH. But port 22 is not blocked. Pings work. I'm running CentOS 7 VMs and open source Docker. I want to SSH to Docker containers from other VMs or other Docker ...
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1answer
329 views

Add module to nginx after installation

Hi i did install nginx with this command on centos 6 sudo yum install nginx and it work but i need to compile wit rtmp module so How can I find the path to make some changes ./configure ...
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1answer
28 views

Convert init script to systemd - executable path is not absolute

I am trying to convert one of my init scripts to systemd but to no avail. [Unit] Description=My Service After=network.target Wants=mysql.service [Service] Type=oneshot ...
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1answer
361 views

Xorg Different Height Monitors

I am trying to set up a dual monitor desktop, with a 19" LED monitor, and a 15" CRT monitor, and have done so, using nvidia-settings to write to my xorg.conf. However, the problem I am now dealing ...
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1answer
110 views

No rtp: Asterisk 11 + webRTC + CentOS 6

I installed Asterisk 11 on a CentOS 6 machine and tried to run a simple js script with jsSIP for making a voice call inside my LAN. However, Asterisk doesn't seem to deliver the RTP packets since they ...
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1answer
61 views

Samba 4.2.3 - Access Denied to Home folder as root user

I am running CentOS 7.2 x64 with Samba 4.2.3-12.el7_2. My Samba config is as follows: [global] server string = log file = /var/log/samba/log.%m max log size = 50 guest ...