This section is from the "Version Control with Subversion" book, by Ben Collins-Sussman, Brian W. Fitzpatrick and C. Michael Pilato. Also available from Amazon: Version Control with Subversion.
svnlook youngest — Print the youngest revision number.
svnlook youngest REPOS_PATH
Print the youngest revision number of a repository.
This shows the youngest revision of our sample repository:
$ svnlook youngest /var/svn/repos/ 42