When creating either a self signed certificate or a certificate request, Kerio MailServer uses 1024 bit encryption. You may however prefer stronger encryption, especially if you are using a signing authority such as GoDaddy, which requires 2048 bit encryption. In this case, you may use the free OpenSSL utility that is available with most Unix [...]

I am pleased to announce that ZZ Servers now has CentOS 5.1 available as an option for VPS installation.  CentOS or Community Enterprise Operating System is a Linux distribution Enterprise-class Linux Distribution derived from Red Hat Enterprise Linux (RHEL).  CentOS conforms fully with the upstream vendors redistribution policy and aims to be 100% binary compatible. [...]

A weakness has been discovered in the random number generator used by OpenSSL on Debian and Ubuntu systems. As a result of this weakness, certain encryption keys are much more common than they should be, such that an attacker could guess the key through a brute-force attack given minimal knowledge of the system. This particularly [...]

The easiest way to learn Linux permissions is from an example. The ls -l command generates a list of contents, such as files along with their permissions. Let’s take a look at the default values for a file called Filename. We are adding spaces to make the output more legible.

This short guide shows some important commands for your daily work on the Linux command line.

Simple linux command to search all files in a given path and display the line in the file which matches defined content. find <PATH> -print | xargs grep "<CONTENT>" or find <PATH> -type f -exec grep -H "<CONTENT>" \;