dsh : a distributed shell
Saturday, March 22nd, 2008
A common problem when you deal with a pool of servers (clusters or server farms, you name it) is to execute the same command line on each server. It is usual to solve this with a “for” construct such as :
for i in server1 server2 ; do ssh $i "uname -a"; done
But this is basically re-inventing the wheel everytime. Here comes Distributed Shell (DSH).
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CFEngine – Installing on Debian GNU/Linux
Monday, April 30th, 2007In this post we’ll install CFEngine on a Debian system. Debian make is really simple to install any packages, so let’s follow the “standard” package installation procedure (I’ll assume that apt is correctly setup on your system ! If you have troubles with it, let me know, I’ll write a post on this topic).
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CFEngine – What is it ?
Monday, April 30th, 2007Keeping track of changes with cfengine and SubVersioN
Friday, October 13th, 2006Cfengine is a tool which purpose is to describe what is a healthy system and how to bring it back to normal when something fails.
I won’t go into an explanation about how cfengine works, because the project webpage already has a neat tutorial and complete reference. Instead of that, I’ll explain how I used cfengine to build a fool proof Linux firewall.




