svn logs and what was committed

To see all the comments of commits, use:

svn log

To see all the files modified for revision 123 use:

svn log -r 123 -v


To see all files modified for revisions 123 to 456 use:


svn log -r 123:456 -v


More info here:
http://svnbook.red-bean.com/en/1.5/svn.tour.history.html