revert added files
svn rm --keep-local .
. - path to the folder or file
--keep-local - remove files only from repository and keep it local ()
show file history
svn log -l 5 /path/to/file.txt
-l 5 - number of last versions to show
/path/to/file.txt - your file
compare two file versions
svn -r 1:2 diff /path/to/file.txt
-r 1:2 - version numbers (only numbers without r)
search file through repository with many not checked out projects
svn list -R http://svn.my_host/svn/my_repo_folders | grep my_file_name