Subversion
Subversion (SVN) is a version control system. It replaces CVS and, like its forebear, keeps track of changes made to books. The Subversion project is hosted by Tigris.org and a command reference can be downloaded in PostScript format from the site. (NB: Evince, the PDF and PostScript file viewer included with Fedora can display PostScript files.)
Configuring an SVN Editor
Add the following line to your ~/.bashrc file to see a list of files that will be committed during an SVN commit:
export SVN_EDITOR=/bin/vi
After configuring the SVN_EDITOR variable, running the svn ci command displays list of files that have been modified. This is useful if you accidentally modified a file that you do not want to commit back into SVN. Running the svn ci -m "this is a log file" command does display which files have changed, that is, the files that are being committed back into SVN.