Installation:

As user root copy the contents of the subdirectory Mod/User to
/usr/lib/freecad/Mod/User:

svn co http://repos.borg.ch/projects/freecad/trunk/Mod/User /usr/lib/freecad/Mod/User


Install the usercmds as normal user, for example into ~/freecad:

mkdir ~/freecad
svn co http://repos.borg.ch/projects/freecad/trunk/usercmds ~/freecad/usercmds


Enable the user commands:

cd ~/freecad/usercmds
./enable.sh