I just successfully updated my Dell PowerEdge 1850 from CentOS 4.8 to CentOS 5.4, luckily the issues I faced were not so rare. The steps I used are listed below, may it helpful for you as well! Although this post…

Recently I’m playing with Xen virtualization, and I came across one protential problem. As I need to share my guest machines to clients,  I must give them root privileges… that’s whats VPS-es all about… having root access to OS without…

As indicated in title, this request is probably very common for sysadmins. For example, when a Java environment is ready, we need to make sure that JAVA_HOME is globally available for some system accounts, so that they can restart java…

CentOS community annouced the availability of CentOS-5.4 for i386 and x86_64 Architectures this week. It’s based on the upstream release Redhat Enterprise Linux 5.4.0 and includes packages from all variants including Server and Client. This is just an announcement email,…

In a former post, we know how to use OpenVZ to create virtual system in CentOS, this article will show you how to install Windows under Xen on CentOS 5.3. We fixed one of the problems of Windows XP under…

This article will describe how to create OpenVZ container in CentOS 5.4. With OpenVZ you can create multiple Virtual Private Servers (VPS) on same hardware machine and running them simultaneously and efficiently. OpenVZ is the open-source branch of Virtuozzo, a…

How can I disable YUM automatic update completely? In some old versioned system, YUM auto-update feature comes as an extension named “yum-autoupdate”, and it contains runlevel scripts and scheduled crontab scripts. 

I made a mistake and added additional repo under CentOS / RHEL 5.x server. Now when I try to upgrade packages it gives me out broken ependencies / missing dependency error. How do I skip broken packages and apply updates…

Recently I was working on a Dell PE1950 at work and decided to get Xen installed, so that I can create some virtual servers for our developers. Finding out that Xen in Redhat Enterprise Linux is not so easy to…