How to list all network connections (including which app they belong to)

lsof -i -nP

from http://ananthchellathurai.blogspot.de/2013/05/collection-of-very-interesting-unix.html

Multiple Skype instances on OS X

sudo /Applications/Skype.app/Contents/MacOS/Skype /secondary

from http://superuser.com/questions/271646/multiple-skype-clients-on-mac-os-x

Home / End OSX Terminal

In order to get page up and page down to work properly under Mac OSX Terminal, as well as the home and end of line, you need to go to Terminal Preferences and then Keyboard and configure the right escape key sequences: Key Escape Sequence Home \033OH End \033OF The O's are captital 'O's as in Omaha not 0/zero.

Gute Formelsammlung für Informatik

http://www.jkrieger.de/download/informatik.pdf

Why does OSGI look like it does...

http://njbartlett.name/blog/2010/03/17/osgi-and-how-it-got-that-way/

Alle .svn rekursiv löschen

find . -name .svn -print0 | xargs -0 rm -rf

von: http://lifedraft.de/blog/2008/01/alle-svn-ordner-rekursiv-loeschen/

Postfix, Dovecot, Mysql, Spamassassin, Postgrey,.....

Siehe

http://workaround.org/articles/ispmail-etch/