Category Archives: System Administration
What’s the use of backups if you can’t restore from them? In the previous post on “Backup Xen with LVM and Rsnapshot” we worked on creating backups of Xen (guest/domain) VMs with LVM, and here we’ll cover the process of … Continue reading
This is a draft of my installation process which is mainly based from this blog: Efficient Xen Backups Using LVM and Rsnapshot. Our setup is on Debian 6 server with 2TB disk running 10 vpses. We followed the above guide with notes … Continue reading
I can’t find commands in gitolite to manage repository or project name, so here’s what I got from other sources. Add or create repository Add entry for new project or repository in your gitolite config (conf/gitolite.conf) Commit and push your … Continue reading
Here’s a summary for vsftpd setup with virtual user and directory in Debian. It’s probably the same process on other Debian-based distros as well as Redhat-based distros. No need to define what’s vsftpd and what’s virtual users – let’s just … Continue reading
Yum Error: There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them. With unfinished transactions, yum refers to any incomplete or aborted transactions, such as package installations or updates. Obviously, yum wants you to run yum-complete-transaction … Continue reading
A great way to do a real-world disk test on your linux system is with a program called dd. dd stands for data description and is used for copying data sources. A simple command to do real-world disk write test … Continue reading
The new Apache 2.4 has been released a few weeks ago and I decided to use this version while installing a new server (I compiled it from scratch rather that using an rpm or deb). After using one of my … Continue reading
For those not familiar with the current state of digital television, cable providers send signals to your house in a format called QAM. This comes in two flavors, Encrypted and Unencrypted formats. Encryption is used to protect channel content from … Continue reading
After revolutionizing desktop software and server software, the latest success of open source technology is open source network monitoring software. As networks are getting larger, more complex and more heterogeneous, constant monitoring is imperative to minimize their downtime. Open source … Continue reading
The detection, diagnosis and resolution of performance issues within a network is collectively referred to as network performance monitoring. Increasing size, complexity and diversity of networks make them a challenge to manage. Carefully observing the behavior of a network, monitoring … Continue reading