Access to the CVS repository of LON-CAPA is available by
export CVSROOT=:pserver:USERNAME@zaphod.lite.msu.edu:/home/cvs cvs login cvs co loncapa
For more information on using CVS, please visit http://www.cvshome.org/ or read loncom/build/readme.html after downloading the current version of LON-CAPA as described above.
Additionally, the IRC channel #loncapa on freenode.net often contains a few lon-capa developers willing to help out.