CentOS is a free (as in beer and speech) GNU/Linux distribution that is community driven and based on source code released from RedHat.

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Installing Centos onto server for first time [on hold]

HP ProLiant Ok, so not my first time at all, i have done it a hundred or so times but this time is causing an issue. As i get to selecting the destination of the install in the installation options ...
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1answer
10 views

CentOS 7 firewall-cmd not found

I have just installed CentOS 7: [root@new ~]# cat /etc/redhat-release CentOS Linux release 7.1.1503 (Core) I am trying to configure the firewall, and I'm told that in CentOS 7 iptables is no ...
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1answer
37 views

Where is the /var folder? [on hold]

I have new centos 6.6 install. When I do a df-h I get the following. My worry now should I resinstall to create a separate /var or leave it where it will be enough? Where will the /var be in the / or ...
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10 views

xrdp changing PATH environment variable

All, I'm using xrdp to connect to a Centos 7 box. I notice that my PATH environment variable is different depending on whether I RDP in or SSH and I can't for the life of me figure out where that's ...
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13 views

Cannot get current device settings: Operation not supported ethtool CentOS 7

Received an error "Cannot get current device settings: Operation not supported ethtool" while changing network speed using ethtool command on centos, # ethtool -s eth0 autoneg off speed 100 duplex ...
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33 views

Performance Issue on Centos Server

I hava VPS from OVH (has 2 GB of RAM, dual core 2.8 Ghz wth 2MB cache, 25 GB RAID 10) with Zpanel 10.1.1 and currently there are 6 websites running on it (2 phpbb3, 3 wordpress and one other script). ...
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1answer
20 views

Bind 9: Two public IPs x One Server (CentOS 6)

My current network has the following logic. Each router has a public IP. Router 1 192.168.0.1 255.255.255.0 Router 2 192.168.0.2 255.255.255.0 Server 1 192.168.0.7 255.255.255.0 I want to ...
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2answers
34 views

how to ssh from a vm to another vm that is on a different host

I have 2 CentOS computer in the same local area network. Both computers have their own virtual machines running CentOS. I would like to ssh from the virtual machine of 1 host to the virtual machine of ...
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1answer
24 views

date and hwclock not in sync - why

I am in GMT+8 Singapore [root@SJOAM ~]# hwclock -r Thu 30 Jul 2015 02:10:14 AM SGT -0.469446 seconds [root@SJOAM ~]# date Thu Jul 30 10:11:28 SGT 2015 [root@SJOAM ~]# cat /etc/sysconfig/clock # ...
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3answers
37 views

Migrate VPS to Same Machine Without Losing Emails

I have a centos 6 VPS running ispconfig that isn't in good shape at the moment. Yum is broken beyond repair and it looks like my best option for fixing is a reinstall. I'm planning to backup, install ...
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1answer
36 views

Install a newer version of Git on CentOS 7

I like to enable Git "Push to Deploy" on my CentOS 7 server. Currently I only can get Git 1.8.3.1 via yum. I need a newer version. Do I have to build it from source or is there any repo I can use? I ...
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21 views

Centos. infiniband multicast join failed for status -22

I have a cluster with Linux Centos 6.5 as OS. All the machines are connected by infiniband, the network is working fine but in the /var/log/messages of all the machines I can see the following message ...
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21 views

Growing docker's volume on an LVM

I followed the instructions here to set up docker on CentOS using the LVM. I fed it a 16G disk. It consumed 6.37GB. Now, one of my containers ran out of disk space. What do I have to do for docker to ...
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1answer
15 views

Is “QUEUE=” in /etc/sysconfig/sendmail the same as the “-q” switch in sendmail?

CentOS 5.x, SendMail 8.14.4 My Sendmail server is currently configured to retry deferred messages every hour. In /etc/sysconfig/sendmail I have the following: DAEMON=yes QUEUE=1h I don't see ...
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1answer
30 views

How to configure dhclient on CentOS to get IP from a specific DHCP server

I have a situation where I am able to launch CentOS 6.6 images on a subnet such that the VM instances get their IP addresses from the virtual gateway of the subnet. Now this gateway has gone wonky and ...
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2answers
51 views

Configure IPv6 - CentOS OVH - Can't ping

I can't ping my IPv6 from outside and inside of the server, i can't ping any IPv6. My IPv6 : 2001:41d0:2:XXXX::/64 I use CentOS 6.6 with a Xen Kernel that supports IPv6. My provider is OVH and i ...
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0answers
19 views

Force Linux to reload passwords [on hold]

I have a small cluster of Linux computers. To make administering them easier, they share via NFS the /home directory of the master computer, as well as the files that describe the usernames and ...
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1answer
17 views

How to configure a zone transfer from a windows 2008 primary dns server to a CentOS secondary dns server

So my primary dns server is a windows machine and I would like to configure a zone transfer to a secondary dns server that runs CentOS. Both indivdual dns servers were tested and work on their own. ...
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18 views

Redmine can't see git repo from local gitlab server

I'm setting up a VM with centos 7, gitlab-ce and redmine. Everything is installed and running, but I'm unable to setup integration: When I try to access http://redmine/projects/myproject/repository, ...
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16 views

How to get output 'xentop' or 'xm top' command in centOS

I would like to develop shell script by 'xmtop' or 'xm top' command get output in same format or just show on command line like, top -c, w .
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19 views

nginx server installation on centos6 redirecting to /cgi-sys/defaultwebpage.cgi

i'm installing wordpress to my VPS, so far i belive i have everything configurated correctly but it doesnt starts the wp-admin/install.php, it redirects to /cgi-sys/defaultwebpage.cgi everytime i go ...
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1answer
30 views

Different network speeds from servers on same subnet

I have a pretty strange issue, I'm looking for advice on how I can debug it. I have two servers (A) and (B) on the same subnet and switch. Server A->B transfers at a full 12MB/s and vice-versa. ...
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20 views

R packages - Should I mount /usr/share/R/library

We have a small cluster of linux machines (~15) with up to 20 users. Over the last few years we have written a few basic R scripts for doing basic statistical analysis. The problem I have had as a ...
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16 views

Policy based routing on centos [duplicate]

I am trying trying to implement policy based routing on a centos 7 server using these directions - . The routing works fine until I reboot then the policy routing rules disappear. If I enter them ...
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1answer
20 views

What might be using my smtp port on a new CentOS machine?

I'm trying to setup a simple email server using node smtp-server. I'm the only one that's ever accessed the machine (a CentOS 6.5 box on Digital Ocean), and I've only set up 2 http servers. I'm ...
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17 views

Routing issues with bonded VLAN trunk bridged to Xen dom0 on CentOS

I am setting up a new dom0 which has a LACP bond. Connectivity is fine between the network, dom0 and domU's without the trunk enabled. Once I start tagging traffic on the switch and add the ...
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11 views

Low disk space on a centos server [duplicate]

I have a Problem on a centos server and i am unable to drag files via ftp the server has a hard disk with 2 terabytes and i checked all files on how much disk space is consuming and it is 2.9gb and ...
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38 views

I can only access my wordpress site using IP address but not with domain

I uploaded a fresh copy of the latest wordpress 4.2.3 and uploaded it to a domain folder in /home/abc.com/public_html/ using Kloxo-MR file manager. After setting up the wp-config file and setting up ...
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13 views

BIND server doesn't respond after restarting Linux server [closed]

This is a strange problem. I finally got my BIND nameserver to work, and set up a secondary nameserver with buddyNS. It works fine, until I restart my server, using init 6, or even a full reboot. ...
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1answer
28 views

How can I install php53u-xml package (CentOS)?

How can I install php53u-xml package (CentOS)? Is there still a repository where this package is available? I cannot find this package nowhere. Info about one of installed packages: [root@us03659 ...
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2answers
36 views

Rkhunter reports openssl warning

I have installed and configured rkhunter on Centos and I have no warning except Checking version of OpenSSL [ Warning ] when I check log file I see that I need to update ...
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1answer
15 views

How to stop Apache HTTPS ReverseProxy passing basic auth to TomCat

Apache currently interogates the user for their basic auth credentials, once the correct details are entered it passes basic auth credentials to the tomcat server it's proxying. This confuses the app ...
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2answers
58 views

Dovecot is not working

I'm having a server. The server information I've given below. Linux host.com 2.6.32-531.29.2.lve1.3.11.1.el6.x86_64 #1 SMP Thu Dec 18 06:49:17 EST 2014 x86_64 x86_64 x86_64 GNU/Linux When I was ...
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23 views

How to change FTP home directory in Centos 6 [closed]

I have created one Linux centOS 6 instance in Amazon EC2 and installed cPanel on it and started running my websites there . The issue i face was when i try to FTP to the instance with following config ...
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1answer
27 views

Samba not allowing access to /var/www folder

I have a local webserver that I want to have samba access to. In my smb.conf everything seems to be working except I cannot access the www folder. I have full permissions on it and have tried ...
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1answer
42 views

Apache not proxying HTTPS requests to tomcat

Centos 7, Apache 2.4, TomCat 7.0.52, Java 1.7 I am trying to configure Apache to proxy a tomcat server (running Jira / Confluence) using HTTPS: (HTTPS:443) -> ApacheServer -> (HTTP:8090 or ...
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5 views

Anacron - multiple sets of variables

Our environment has an existing set of anacron jobs with the following variables: RANDOM_DELAY=45 START_HOURS_RANGE=3-22 I want to add a new job, preferably in /etc/cron.daily, with a different ...
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19 views

How to keep CentOS from losing its internet connection in a VMWare Fusion 7 VM? [closed]

I've been testing an install script on multiple OS's. So far: Yosemite, Mavericks, Ubuntu, and now CentOS 7. I'm using a trial version of VMWare Fusion 7 Pro. I didn't have any issues with the ...
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34 views

how to update a package in ubuntu 10.04

So I don't have much server experience so please bear with me... I working on a system with ubuntu 10.04 and have installed a program called pdftk. When I ran apt-get install pdftk, it successfully ...
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1answer
33 views

In centos mouse and keyboard does not work after deleting /var/cache [closed]

After deleting accidentely /var/cache in centos 6.5, restart my PC, the mouse and keyboard does not work anymore
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1answer
43 views

Changing I/O scheduler for SSD

I have many CentOS systems, some of them have traditional hard disks, some SSD, and some mix of them. I would like to change scheduler for SSD to deadline. So at runtime I can simply scan check ...
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2answers
31 views

Mail Server for a subdomain on a different Server?

I'm currently assigned the administration of a server that is accessed through a subdomain of another (not administrating example.com but y.example.com), and assigned to implement a web application on ...
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1answer
32 views

Rebooting a production CentOS 6 server that's been up for 365 days

I noticed today when running uptime that my server has been up for exactly 365 days. Which led me to google "should I periodically reboot my server". Which led me to the knowledge that YES, I should ...
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2answers
31 views

Send all linux logs to remote rsyslog and store in original file name

I know there are alot of topics like this one but i have a particular need: I need to send all the logs from linux servers to a central loggin server. Problem 1: On the central server i need to store ...
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36 views

Website (Linux) and Windows (RDP) on Decidicated Server

I just ordered a dedicated server to move my photo gallery website currently in VPS. Dedicated configuration is E3-1230 32GB 2x2 (Raid10) HDD 1Gps port. My website is not a resource hungry because ...
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28 views

Simple secure firewalld allowing only ssh?

I am upgrading to CentOS 7 and learning firewalld. When I set up a new server my default iptable config for best security was (I believe this is a pretty standard config): # IPv4 iptables -F ...
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72 views

task nginx:4164 blocked for more than 120 seconds

My server was working fine for 173 days then it started to happen. Upgrading CentOS 6.6 kernel to latest one didn't helped. Rebooting helps for about 10 minutes then it starts all over again. I'm ...
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10 views

How to install and configure Nagios-MNTOS?

I just tried to configure MNTOS for my 2 Nagios server. I'm very new to this tool. I do not get a clarity on the installation. Should i install MNTOS on a separate server or any of my 2 Nagios ...
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37 views

Recommended config for pagespeed reverse proxy server with apache

I'd like to setup server to use pagespeed reverse proxy server with apache for several sites which cannot run pagespeed on their origin. It seems I should be able to create a VirtualHost for each site ...
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1answer
33 views

Open VPN and Virtual machines

This is my environment: centos 7 running Gnome with KVM two virtual machines running centos 7 Gnome desktop This is what I would like: Users to log into the any virtual machine from either the ...