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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Static IP using Bash vs Router Interface

What is the "proper" way to assign my CentOS 7 Virtual Machine a static IP? I assigned my Host system (Windows 8) a static IP through the router's administration interface, but every tutorial online ...
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Cannot figure out what eats disk space, CentOS6

Here is disk free info: root@nqpc002/]# df -ha Filesystem Size Used Avail Use% Mounted on /dev/sda2 103G 85G 13G 87% / proc 0 0 0 - /proc sysfs ...
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2answers
29 views

Ping between two Linux systems via an intermediate Linux fails

I have a simple network with three Linux systems running CentOS 2.6. Linux 1 (eth1: 192.138.14.1/24) | | (eth4: 192.138.14.4/24) Linux 2 (eth2: 192.138.4.3/24) ...
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1answer
29 views

CentOS 7 Linux resize filesystem after partition resize

I am running CentOS 7 on a HyperV virtual server. I recently increased the size of the hard disk from 32GB to 64GB and used GParted Live to extend the partition, which seems to have worked as shown ...
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20 views

OCI8 extension not loading in PHP 5.4, CentOS 7

I have a CentOS environment running as a VM guest. It runs and Oracle 12.1 Database, along with PHP 5.4.16, on Apache 2.0. I've gone through the installation steps to ensure that the correct OCI ...
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6 views

Words not appearing right in Centos 7

I've just installed Centos 7 on a Dell core i7 laptop. I opened up SQuirrel Client Version 3.3.0 and pasted in some code then this happened. I'm new to SQuirrel and pretty new to Centos but I don't ...
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16 views

How do I enable hyperthreading on CentOS 6?

How do I enable hyperthreading on CentOS 6? I checked the flags field in /proc/cpuinfo and ht is in the flags section. Below is my processor information. ~$ lscpu Architecture: x86_64 ...
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1answer
24 views

How can I prevent that an user sends mail like another user on Postfix?

I am running a Mail Server on CentOS 7. All programs and system are up to date. My Mail Transfer Agent is Postfix, and it uses Dovecot SASL to authenticate the users. In Postfix's configuration, my ...
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33 views

CentOS can't see RAID array partitions

I have the current setup composed by (4x) HDDS sda, sdb, sdc, sdd partitioned in the same way: /dev/sd[abcd] | |- /dev/sd[abcd]1 [EFI FAT 32] |- /dev/sd[abcd]2 [Linux RAID] |- ...
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1answer
15 views

Centos freezes, when trying to open crontab

I'm trying to open crontab, but when i type it the whole os just freezes... I thought, maybe that's because vim isn't installed, but it is. I also checked the cron.allow and cron.deny files, but they ...
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Xen hypervisor setup | Enthusiast | Access VM on host | Sugesstions

Planning to use Xen in a small project to learn about virtualisation, and have selected CentOS as host (previous attempts with Debian failed). Would be installing Xen on a Laptop (ASUS X550LD). Is it ...
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1answer
10 views

Centos fstab how to know what filesystem to put

i have installed centos with default settings, and i'd like to partition my server securely by modifying fstab. Thing is i don't know which filesystem i should put in the fstab file to reference eg. ...
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17 views

CentOS - Postfix rejects incoming mails

I have VPS with Centos 6 with Postfix, Exim and Dovecot. When I try to send mail from GMail to mail account from my server I receive following error in /var/log/maillog: Feb 3 13:36:29 mobilepro ...
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21 views

How to create a custom debian iso file from Windows step-by-step?

I'm using a Windows machine as a personal PC and I would like to know how could I customize a CentOS 6.7 iso file. In general, what I'd like to have on that specific CentOS is: a .tar archive some ...
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15 views

VPS CPU HIGH LOAD

I got new vps with 256 MB RAM, 1 CPU core. I have few test php/mysql backend scripts, which is run by cronjob. But while running,i found that cpu usage are getting high to 10, and memory fulled. ...
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1answer
25 views

Use winexe and powershell to configure some service on a Windows

I'm making a script to configure SNMP on a Windows. This script had to be launched from a Centos OS. I'm quite a zero in Windows scripting so i found a PSscript on the Internet : ...
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1answer
22 views

Error when trying to start Centos 7 installer

I am getting an error, when trying to install Centos... I wasn't able to find the log file the installer was talking about, and this is why i was forced to record with my mobile phone... Link to ...
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15 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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1answer
21 views

During installation of CentOS 7 what to choose for host name

I'm trying to install CentOS 7 server. During the installation what to choose for the host name? Is "server.mydomain.tld" good or do I need to choose only "server"?
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1answer
47 views

http://127.0.0.1 returning 401 Unauthorized

I have a CentOS 7 box and have a service running on port 32400 (Plex Media Server) which is trying to pull some information via HTTP to http://127.0.0.1:32400/library/changestamp but a 401 response is ...
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29 views

Centos warewulf cluster with openmpi

I have setup a warewulf cluster on centos 7 and i have installed openmpi-x86_64-1.10.0-10.el7, additionally i also installed mpich. Wen i run mpirun with openmpi it results in the error below, the ...
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105 views

Installed Python 2.7, but Module in /usr/lib/python2.6/site-packages

I'm running CentOS, it already has Python2.6. I installed Python2.7 and I can see version 2.7 with python -V. I installed demjson module(pip install demjson) and then I try to execute the program. It ...
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1answer
48 views

how to install latest ffmpeg on Centos

I want to install the latest ffmpeg 2.8.5 on the Centos server. Followed this website http://www.mysql-apache-php.com/ffmpeg-install.htm and completed the installation. But the installed ffmpeg is an ...
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1answer
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CentOS 6 - Cpanel/WHM DNS Issues

So for some reason sslpro.xyz wont resolve yet server.sslpro.xyz and ns1/2.sslpro.xyz does. Heres my IntoDNS: intodns . com/sslpro.xyz I have root access to WHM and SSH so please guide me! This is ...
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6 views

CentOS Cpanel - Default CGI Page

I added a few files like index.php etc to /public_html using FileZilla on my VPS but it still shows the Default cgi page. Anyone have any ideas why and how I could fix this?
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1answer
27 views

Fully resetting MySQL

I've just spun up a CentOS 6 server. I installed mysql on it yum install mysql-server And after I started the MySQL service it spat out on STDOUT a bunch of stuff about the necessity of changing ...
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25 views

Disk-less Booting with UEFI mode?

I'm fairly new to this. I was able to successfully disk-less boot in Legacy mode. But trying to see whether I can do the same on UEFI mode; since one of my system has issue on Legacy mode. I see ...
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1answer
21 views

backing up Linux (CentOS) to rsync.net

I'm doing a full backup of a server using /usr/bin/rsync and it seemed to hang. The problem was that the /proc directory has a huge file -r-------- 1 root root 140737477877760 Jan 24 ...
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1answer
66 views

CentOS 7 Minimal Installation on Hyper-V: X11 forwarding using Xming and PuTTy error, xhost: unable to open display “:0.0”

Before telling me that there are a lot of post relates to X11 forwarding error, let me put you in context of the things that I have done: I have installed the following packages: yum install -y ...
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9 views

Firefox on CentOS with a transparent background

How to change the background of Firefox when viewing web pages on CentOS 6.3? I don't know why. After a restart, the background is back to normal white. But after running for a while, it becomes half ...
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2answers
33 views

Can't telnet into mail server

I have a machine running CentOS. From that machine I can't telnet into a mail server. From my local machine I can do the following command: telnet mailserver.com 25 From there I can't send emails ...
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I want to do ldap client setup on my centos 7 virtual machine.

I have done 389 server setup on my virtual machine but i want to do client side setup using tls/ssl. anyone can tell me what's the step for the same.
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1answer
17 views

Centos graphical installer format old disk

In the Centos graphical installer, i would like to format the whole disk and start from scratch, but it still keeps a rescue version from the previous os on the disk, how can i disable that and ...
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1answer
17 views

Need Information about “Package Update Process”

When i issue the command "yum update" as root under CentOS, all updates will be installed. But what exactly happens during the update process. I am asking myself how a package gets updated. For ...
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19 views

Docker centos container on Windows is very slow

I have Docker container on Windows machine via Docker Toolbox. I mount folder from Windows to my CentOS container and looks like it works very slow. I mount folder with this command: docker run --name ...
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25 views

Can't access certain HTTPS sites on Firefox 3.6

I have an old box that has been running for many many years, and has been functioning as a monitoring box (i.e there are a load of tv's connected to it, and on those, there are many web pages showing ...
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1answer
14 views

CentOS 5.2, set up IP network

Good afternoon, I'm trying to get GCC installed on a CentOS 5.2 system, and I've been sent from UNIX/Linux forum to network engineering forum ...
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14 views

Can't see any website hosted in a node while same issue is not present in other nodes in LAN

Recently we setup a Hadoop cluster with 10 nodes in our Office premises. All of these nodes are installed with CentOS 6. However the issue I'm facing may not be related to Hadoop and accordingly I'm ...
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17 views

PostFix Issue When Sending Emails through Outlook

I also have the Relay access denied issue and it's really disturbing me. I can send and receive normally from the web mail. However, when I configure the email on [B]Outlook [/B]without using ...
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0answers
24 views

Apache proxy returning 403 forbidden

I'm trying to set up a home page where I can redirect my requests to others servers with a proxy so I have a single point of entry. I used to have this setup working properly on a windows machine ...
3
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1answer
26 views

RedHat - default gateway static route

I am trying to set static routes and I did not succeed. My situation: 2 Nics 4 ports. Eth0 + Eth1 = bond0 (Class c) Eth2 - Active (Class b) Eth3 - Not Active All traffic goes through bond0 (default ...
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20 views

ESX 6 and Linux 3.x arp fail in back 2 back link

we are having a strange problem with back 2 back connection between an ESX 6 and CentOS 7 machine. Hoping to find a solution on stackoverflow The story is below: - we are using a CentOS 7 directly ...
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1answer
44 views

How do I create rDNS (Reverse DNS)

How to create rDNS (Reverse DNS), I am using Centos 7.0 and I need to create rDNS for 50 IP's and domain. Can you please guide me how can I create. Example. Example.com - xxx.xxx.xxx.xx0 ...
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32 views

Bootable CentOS disk image won't boot in VMWare

I have custom bootable disk image built from a full CentOS 7.1 iso. I can burn this raw image to a USB stick and then use it to boot a server and install CentOS on that server. Alternative, I can ...
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44 views

installing mariadb 5 on centos 7 Unit mariadb.service failed to load: No such file or directory

I try to install mariadb on centos 7 using official documentation https://mariadb.com/kb/en/mariadb/yum/ I have installed these packages: Installed Packages MariaDB-server.x86_64 ...
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1answer
50 views

Apache httpd.conf - Virtual hosts port

I have an Apache Webserver running, which is reachable over the ip/port-combination 123.456.789:9000 from my browser. Also I have a GitLab instance running on the ip/port-combination 123.456.789:8888 ...
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2answers
17 views

How to boot centos for recovery without monitor or DVD?

I modified the fstab to include the newly created partition, then rebooted. But the system won't boot, and I suspect it is due to incorrect information in fstab. My machine has no monitor, no working ...
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49 views

Port Forwarding on CentOS 7 using FirewallD

I have a network where I have a Netgear cable modem bridged to a VyOS Router, then a DMZ network to my external firewall / internal gateway then into my local network. (I have the Netgear modem ...
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31 views

CentOS 7 and LDAP Authentication

I want to connect my CentOS 7 to our AD server for authentication, but I am confused about the configuration. Here is the configuration that is working on an SVN server: SVNParentPath /var/svn ...
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1answer
36 views

Need to backup restore Linux system remotely

I am trying to build a setup like WDS (Windows Deployment Service) in a Linux environment. What I have: A Dell server with good amount of RAM and lots of space. OS is CentOS 6.5. Few 3rd party ...