Balelec 2005
There we go, the first year I participated as staff: Festival Balelec 2005

There we go, the first year I participated as staff: Festival Balelec 2005

Luckily this one took place very year (for more than 30 years now!): Festival Balelec 2006

Yet another great event which no longer exists: ClosedAir 2006

Let's start the last week of this badge advent calendar with another tech conference badge (looks like the conference no longer exists, thus no link to any website): San Francisco LinuxWorld 2007

And there the other student music festival which managed to provide badges: Artiphys 2008

Quick and dirty way to get an alert before your server starts to go crazy because of a full disk.
This script checks if a disk is more than 75% full.
#!/bin/bash df -h | awk '/%/ { limit = 75 percent = sprintf("%d",$5) if ( percent > limit ) { print "Warning: ",$6," (",$1,") is to ",percent,"% full:" print $0 } }'
Save it under /root/check_disk_usage.sh and create the following crontab entry to check the disk usage every day at half past midnight.
30 0 * * * /root/check_disk_usage.sh
Assuming your host has configured an MTA and defined a recipient for root@<yourhost>, you should get an e-mail whenever a disk is more than 75% full.
Now on to the badges of 2008, as every year: Festival Balelec 2008

(via vowe.net)
The only time (for now) when I got to fly in a helicopter for a music festival was at: Caprices 2009

And once more there is a badge from: Festival Balelec 2009
