CentOS is a Linux distribution standing for "Community ENTerprise Operating System" and is a rebuild of "Red Hat Enterprise Linux" (RHEL). The "CentOS6" tag refers to versions 6.x of CentOS.

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MAGMI fails while importing big chunks of records. Ideal Mysql configuration for Magmi

Configuration: Linux Centos 6, NGINX, Mysql We are trying to use MAGMI a common tool for mass importing of data in Mysql based on webbrowser. I run in an issue. As a try to import more than a small ...
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1answer
149 views

Linux :SSH sessions connections getting closed on pkill

I inadvertently executed the following command : pkill -9 tar -xvf I see that all my SSH sessions onto system gets disconnected and ssh deamon also stops. How is the above command affecting SSH ...
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1answer
126 views

Replacing SSL Cert Apache

I am replacing our SSL cert on our Apache web server. This is the first time I have done this, with my 2 colleagues being on holiday, and an urgent need to replace our SSL cert(due to the openssl ...
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2answers
69 views

Iptables save expected behaviour [closed]

I was updating my iptables in CentOS 6.4 I added port 8080 to iptables and ran iptables save. However now when I view my iptables all it is showing me is: # Generated by iptables-save v1.4.7 on Wed ...
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2answers
2k views

CentOS yum *.rpm package changelog (not installation changelog)

I just logged into my new rented server and updated openssl because of the heartbleed-bug (http://heartbleed.com). I updated using yum list openssl ... Installed Packages openssl.x86_64 ...
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1answer
71 views

Samba configuaration not working

I am trying to set up a Samba share with a Windows computer from CentOS6. This is my current samba config: [global] restrict anonymous = no domain master = no preferred master = no workgroup = ...
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1answer
1k views

Where do I specify the Bind DN and password for sss+ldap?

I'm trying sssd for LDAP authentication, and while it can show user IDs with the id command, getent group and getent passwd do not show LDAP names, and while I can chown files to ldap users, they ls ...
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0answers
370 views

Confirm IPTables firewall settings for NFS v4 server?

This question has been asked here before but has conflicting and possibly outdated answers. It seems to depend on OS, version of OS, and version of NFS. On a CentOS 6.5 server, the default rules are ...
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2answers
2k views

Check RAID rebuild status of R710?

How can I check the rebuild status of a RAID volume without booting into the PERC utility in CentOS via the command-line?
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0answers
390 views

pysqlite for python 3.3.5 on Centos 6.5

I have compiled python 3.3.5 from source in the /opt folder as follows: yum install sqlite-devel ./configure --prefix=/opt/python3 make make install ln -s /opt/python3/bin/python3 /usr/bin/python3 ...
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1answer
4k views

Uninstall nagios that has been manually installed through source

I installed nagios through this guide which works fine, but now i'd like to uninstall it altogether. Could you guide me what i need to delete as i cannot see an uninstallation routine.
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1answer
537 views

Abnormal CPU usage during Disk Write Operations

I have a decent CentOS 6.5 dedicated host (CentOS 6.5/E3-1230 3.2Ghz Quad Core + HT/16GB/Software Raid 1 SATA II/WD2503ABYX/ext4) with the default CentOS kernel and "elevator=deadline" in grub. I/O ...
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3answers
1k views

phpmyadmin can't login on nginx Centos 6 Server

I've installed phpmyadmin on my ded server with Nginx and MariaDB under Centos 6.i can login into mariaDB cli with root user falwlessly but i can't login through phpmyadmin. it shows me first login ...
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1answer
1k views

installing php-mysql on centos 6

I've installed MariaDB for my database and Nginx on my computer that running Centos 6 . when i want to install php-mysql driver i get this problem : # yum install php-mysql Loaded plugins: ...
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1answer
300 views

Chillispot and DHCP setup on single server [closed]

Background I have a simple network topology consisting of 3 pieces of hardware, a CentOS server, an access point and a 4g modem. The server has 2 LAN ports and the 4g modem and the access point are ...
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1answer
287 views

bash script to check zabbix java gateway

I wrote simple script to check status of a service and when service is down search live processes for the service and kill them, then remove pid file and restart service. The problem is that the ...
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1answer
402 views

Centos 6.5, Active directory and ldapsearch

I need to query the ldap part of an Active Directory DC from CentOS 6.5. ldapsearch allows me to do that, but I have found two bumps in the "ldapsearch" road: ldapsearch wraps long text to several ...
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1answer
2k views

Postfix Spamassassin deferred queue massive error

I have been witnessing some massive problems with my Postfix email server, equipped with Dovecot, and spamassassin. The log files show errors like below, and there are thousands of such lines in the ...
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1answer
160 views

How to read CPU usage statistics shown in “top” screen?

I'm pretty confused about understanding of CPU usage in a linux server... Please see the screenshot below: WHAT does Cpu(s): 9.1%us mean ACTUALLY? and WHAT does 74.7 at the ruby/deployer row ...
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1answer
880 views

x2Go dependency requires unavailable nx packages on CentOS 6.5

I thought I'm at my wits ends trying to figure out how to resolve these dependencies... [root@mrwizard yum.repos.d]# yum install x2goclient x2goserver [...] Error: Package: ...
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1answer
791 views

Bounced mail reaches postfix but being removed by the queue manager

I have setup postfix and dovecot. Postfix is set to accept connections from my webserver to send out system generated mail. These are being sent out successfully. Sent out emails to some non-existent ...
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0answers
631 views

Failing to mount root from ramdisk while PXE boot

I have a working TFTP/DHCP PXE boot environment where I've already booted some images successful. Now I built an CentOS 6.5 diskless image and this one is failing booting with the following error: No ...
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0answers
204 views

collectd: ping plugin fail randomly on medium/high number of hosts

I am trying to use collectd to monitor ping time and interface traffic of upwards of a 150 hosts, using the snmp and ping plugins (nodes are mostly routers). The servers reads stats (ping/snmp) and ...
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697 views

Routing on CentOS with multiple subnets

I have a server with 2 VLANs on a NIC, configured as follows: eth0 Link encap:Ethernet inet addr:192.168.10.20 Bcast:192.168.10.255 Mask:255.255.255.0 eth0.10 Link encap:Ethernet inet ...
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48 views

Script for creating a session with multiple tabs

I am new to screen utility in CentOS, I've seen this utility being used by OpenStack for logging different services. I am trying to imitate same with my custom script, but I'm unable to :( I've to ...
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2answers
209 views

“Server too busy” after moving to fcgid

I was previously using mod_fastcgi and had issues as described here with configurations getting ignored. After moving to mod_fcgid, I've seen a whole new issue which is causing issues for all sites ...
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1answer
583 views

Server gets hang and shows error: waiting for required block device discovery

Yesterday My server gets hang and it was showing following errors at bottom of console: waiting for required block device discovery waiting for 4 sda-like device(s)... Then I had hard-booted it. ...
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2answers
302 views

Bounced mails not reaching postfix

I have postfix and dovecot installed on a Centos 6.4 production (www.bw.co.uk) machine. The intent is to send all system and transactional messages and collect bounces. The email id's that resulted in ...
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1answer
58 views

Character encoding bugged after migration

I'm facing a nightmarish situation trying to fix my website's character encoding. Latin characters like á, é, ô, ã all turn to � This is my website's structure: I have 3 systems running my website, ...
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1answer
1k views

Adding more space to VirtualBox HD (Centos Host) does not add space in the folder [closed]

I am running Centos 6.5 guest on Windows 7 Pro host (VirtualBox v4.3.6) - all 64 bit. I am trying to increase the size of Centos virtual disk (which is currently about 15G) to 90G. I did run the ...
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1answer
539 views

Automatically acquire IPV6 address in CentOS 6

The network has fixed IPv4 address, and automatic acquired IPv6 address. Does anyone have an idea how to setup? Thanks a lot! I didn't use NetworkManager. The following is my setting, but it does not ...
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3answers
2k views

Exim on Centos - Configuring gmail smtp

I want to set up Exim to send the mails through my gmail (actually my domains google apps). I have added the router, transport and authenticator. Specifically: gmail_route: driver = manualroute ...
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1answer
1k views

centos 6.5 postfix postgresql support

i m trying to use postfix with postgres to create a virtual users mail boxes. I get the following errors : fatal: unsupported dictionary type: pgsql warning: process /usr/libexec/postfix/smtpd pid ...
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1answer
7k views

telnet unable to connect to remote host

I have installed postfix and devcot on one of my live servers to send bulk mail (system messages on sign-up, wrong passwords etc). I use the php_imap function to check bounces and flag those email ...
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2answers
780 views

rbash to limit user to its home directory closes sftp connection

Server: Red Hat Enterprise Linux Server release 6.5 (Santiago) Using openssh-server to allow sftp connexions. I'm trying to limit users to their own personal home directory. So i modified ...
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1answer
738 views

Teamcity, Error collecting changes

Created a brand new TeamCity build project and configuration along w/ a new VCS root and receive the following errors on the first check for revisions TeamCity 8.0.6 (build 27767) running on CentOS ...
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2answers
683 views

rsnapshot: WARNING: Some files and/or directories in / vanished during rsync operation

I once in a while get this message in my rsnapshot log, and an identical message in /var/log/messages. Unfortunately, there is no other deviation from normal output, despite loglevel 5 in ...
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0answers
239 views

Need help getting two commands to run on startup (Seafile)

Trying to get the Dropbox alternative Seafile to run automatically on startup on my VPS running on CentOS 6.4. I want to get these two commands on startup. Noob here, any help will be really ...
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2answers
774 views

Apache has a long lag before responding

I have an Apache server on CentOS that occasionally takes 1-5 seconds to serve a file, including a text file that is 2 characters. I have a JMeter test that gets a few different types of files, and ...
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2answers
63 views

Network Buffer Usage

I am facing some issues with my Application, and am curious to know the network buffer usage at any given moment. I am using a CentOS 6 linux Machine. I know the Default values are present in ...
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1answer
190 views

Shrinking Linux Partition and VM's

I have a Centos 6.2 x86_64 Virtual machine running on an EXSi 5.1 Server. It currently use 320GB of space which is way too much space and need to be shrunk to about 80GB. What I need to do is reduce ...
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2answers
895 views

Unable to access PageSpeed console installed alongside WordPress; getting 503 error and 'LimitInternalRecursion' error

On a CentOS 6 web server with Wordpress installed in /var/www/html/wordpress, and using PageSpeed for caching, I cannot access the /pagespeed_console through the web browser. I only get a 503 error. ...
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2answers
425 views

I can't log into my VPS. Email server up, SSH down, HTTP down

I can't log into my VPS. SSH gives the following error. All the web servers are down. They connect, but do not serve content. However, the email server is still working. The server responds to ping as ...
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4answers
13k views

Trying to understand the correct way to create a static route in CentOS, please assist

I've been trying to understand what's the correct way to add a static route on a CentOS 6.x machine. In some forums they say to create a file named route-dev_name (for example route-eth0) with the ...
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2answers
6k views

Configuring vsftpd to authenticate with Active Directory

We are trying to give vsftpd access to some Active Directory users. Here are some configuration file contents: # egrep -v '^(#.*|)$' vsftpd.conf anonymous_enable=YES local_enable=YES ...
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3answers
1k views

connected to Centos openvpn but no outside internet access

I am using Windows 7 to connect to a VPS server running CentOS 6.4 First off, I have read every single post and just cant find the solution to my problem I configured my VPN server with openvpn, and ...
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1answer
200 views

SSH to local without password

We have some scripts that need to rsync without entering a password. I am trying to SSH to a local machine (itself). I cannot get it to work. It is always asking me for a password. It works fine ...
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1answer
3k views

How do I install HP CentOS repo's

I have been searching for the answer but unable to find any instructions that work for me. I want to install the HP CentOS repo for my new ML310e Gen8 Server to I can setup the insight management ...
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1answer
5k views

How to add /home/user/public_html as virtual host in apache - centos [duplicate]

In Directadmin (I used it before) when we create a reseller, a new user with a home directory was created and user could add domains in a home directory like /home/user/domains/example.com/public_html ...
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1answer
477 views

KVM virtual machine boot messages

Just wondering if anyone knows of a way to stop the following boot messages with a centos 6.5 vm created with qemu-kvm When I start the vm there is a slight delay as the vm posts the following boot ...