1. Check out Aliroot source into a folder (usually specified by the environment variable ALICE)
cd $ALICE
- svn co http://alisoft.cern.ch/AliRoot/trunk AliRoot
+ svn co https://alisoft.cern.ch/AliRoot/trunk AliRoot
+
+Note: Please use https:// if you want to be able to commit changes to the SVN repository.
2. Set the environment variable ALICE_ROOT to point to the source you have checked out