This script written in Python allows to synchronize a distant FTP site with a local directory. Only modified files are uploaded.
The following script can be used to update an entry in a DNS server. It must be fed with a mail message containing specific data in the subject:
Subject: set www as 172.24.0.1 in mydomain.net
This subject will update the address www.mydomain.net to 172.24.0.1. This isn't a really robust script but it used to work for me ©.
This Perl script will check every SMTP server registered as MX server for a particular domain. Example:
[seb@meryllon] % ./mxtest.pl caramail.com 6 / 17
This means that for the domaine “caramail.com”, 6 servers are up when 17 are announced.
In the first version, SMTP connection is done sequentially, so it could be made faster. The second version uses a pool of threads to check the SMTP servers; this is not really faster but at least it was a funny thing to write in a boring moment... It requires a threads-enabled Perl version and has been tested on a Debian Sid with Perl 5.8.
Now, we even have a C version using (this time) non blocking sockets. Note that this requires djbdns library and glib. Compile with:
gcc -g -Wall djbmx.c `pkg-config --cflags glib-2.0` \
-o djbmx `pkg-config --libs glib-2.0` -ldjbdns
I wrote a set of libraries and scripts in both Ruby and JavaScript to manipulate data from the VéloStar OpenData initiative. On the ruby side, this was used to generate an animation of the use of the VéloStar over almost a week. It stores data using RRD, generates PNG files with Cairo and animate the whole thing with mencoder. The Javascript functions were used on a side project that I didn't officially publish.