HOW TO: Remove old kernels in CentOS & RHEL
Removing older kernels in CentOS, RedHat Linux (RHEL), or Scientific Linux is really easy, if you know how! Yum provides a package called “yum-utils” that […]
CentOS
How To: Enable Bacula TLS Encryption, Protect Your Data
Note that this is an updated version of an earlier post on enabling Bacula TLS encryption (TLS is a subset of SSL). We would love […]
Bacula & Postfix as a relay
If you have Bacula installed on a machine that has Postfix configured to relay mail to another host, the Bacula bsmtp command will fail with […]
Postfix with Gmail relay and IPv6
If you notice a message in maillog similar to the following, an easy fix (for now at least!) is to set Postfix to use IPv4: […]
Bacula: Set up backup source (client computer or server)
In order to back up a computer with Bacula, you simply need to install the Bacula File Daemon. Installation commands: CentOS / RHEL / Scientific […]
Add CentOS or RHEL Agents for Unitrends Backup
Client Computer Tasks First, download the agent for your OS from the Unitrends agent update pages: http://www.unitrends.com/support/latest-agent-releases Next, install the downloaded agent with the following […]
Fixing locale and setlocale LC issues in CentOS and RHEL
Locale and setlocale LC error messages You may receive the following errors when logging in to your CentOS or Red Hat Enterprise Linux (RHEL) system […]
Change the default runlevel in CentOS and RHEL
Most servers are run without a GUI, although some administrators will install the GNOME desktop on a server in order to perform some tasks. By […]
Configuring Bacula to Use TLS to Encrypt Connections
UPDATE: There is a new version of this post located here. ARCHIVED VERSION Bacula is a powerful, open-source backup system that can be installed in […]
Postfix relay using Gmail on CentOS
Many ISPs block sending email over port 25. This means that you won’t be able to send mail from your Linux server through simple commands […]