A really short instruction for haw to test your CPU, File IO and MySQL on CentOS 6.5 1. Install sysbench It’s easy and there is a RPM package in repositories yum install sysbench 2. CPU benchmark sysbench –test=cpu –cpu-max-prime=10000 run Continue reading How to benchmark your system with sysbench
Download the antivirus components: yum install clamav-daemon clamav-freshclam clamsmtp Add the following to the end of your “/etc/postfix/main.cf” file: content_filter = scan:[127.0.0.1]:10025 Make your “/etc/clamsmtpd.conf” file look like this: OutAddress: localhost:10026 ClamAddress: /var/run/clamav/clamd.ctl User: clamav Make your “/etc/clamav/clamd.conf” file look Continue reading Postfix Email antivirus scanning with ClamAV on Linux
Templates Templates are a key feature of rsyslog. They allow to specify any format a user might want. They are also used for dynamic file name generation. Every output in rsyslog uses templates – this holds true for files, user Continue reading Custom templates for rsyslog
Using Spamassassin with Postfix Install Spamassasin using the following: yum install spamassassin spamc Configuring Postfix to use Spamassasin. In “/etc/postfix/master.cf”, change this: smtp inet n – – – – smtpd To be this: smtp inet n – – – – Continue reading Postfix Email Spam check with Spamassasin on Linux
This tutorial demonstrates how to find and deal with programs opening network ports on your Linux system. In our example below, the TCP port 6667 is open. This port is usually used for IRC servers. If you see this port Continue reading Find programs listening on network ports and removing them
In addition, VMware Tools automatically updates the guest’s time to match the host operating system’s time in a few other cases where the guest can be expected to have lost a large amount of time (even if periodic time synchronization Continue reading VMware time update problem
In the following article I have summarized some steps and hints to set-up a MySQL active/passive fail-over Cluster also sometimes called MySQL HA. With such a set-up you can achieve a 99.99% (4×9) HA set-up for MySQL (52 minutes downtime Continue reading MySQL HA Cluster – DRBD and Heartbeat
This HowTo will demonstrate how you can run a program on one computer but have it display on another. For this example we’ll assume you have a server with an IP address of “192.168.0.1″ and a desktop computer with an Continue reading Running Remote X Applications
Linux allows administrators to bind multiple network interfaces together into a single channel using the bonding kernel module and a special network interface called a channel bonding interface. Channel bonding enables two or more network interfaces to act as one, simultaneously increasing the Continue reading Bounding network cards
So, we had an old server with mail boxes on it, and we decide to migrate to a newer version and set up an virtual mail server for all our domains (we will see how in another post). Main difference Continue reading Converting old Emails from mail box to mail dir format