XenServer is a wonderful tool. One of the better parts of it is its powerful scripting language, powered by the ‘xe’ command. In order to capture a mass of snapshots, you can either do it manually from the GUI, or scripted. The script supplied below will include shell functions to capture Quiesce snapshots, and it…
Most documentation on the net is about how to run a cluster-in-a-box under Vmware. Very few seem to care about protecting Vmware guests under real RedHat cluster with a shared storage. This article is just about it. While I would not recommend using Vmware in such a setup, it has been the case, and that…
Many of us use tar (many times with gzip or bzip2) for archiving purposes. When performing such an action, a large file, usually, too large, remains. To extract from it, or to split it becomes an effort. This post will show an example of a small script to split an archive and later on, to…
Kickstart is a great method of hands-free installation of RHEL/Centos (and other derived systems). Its power is in its easy interface and rather powerful %post scripting directives. Its weakness is in its lack of flexibility where it comes to package selection and various custom actions. On some cases, companies use web interface (usually home-made) which…
For some reason (probably a typo) I’ve missed an important character in an example I gave here, but I have just recently fixed it. Anyhow, to clarify this, here is the extended description of the correction. The $IFS Bash system variable defines what is the default separator between strings. Changing it can help when dealing…
First and unrelated – this is my birthday. It reminds me that another year passed, and generally speaking, I do not take this too well… Due to massive SPAM attacks, my commenting system is turned off for a while now, and I need to see how I can re-enable it safely. Bash – here we…
