svn lock — Lock working copy paths or URLs in the repository so that no other user can commit changes to them.
Lock each TARGET. If any
TARGET is already locked by another user, print a
warning and continue locking the rest of the
TARGETs. Use --force to steal a
lock from another user or working copy.
--encoding ENC --file (-F) FILENAME --force --force-log --message (-m) MESSAGE --targets FILENAME
在工作副本锁定两个文件：
$ svn lock tree.jpg house.jpg 'tree.jpg' locked by user 'harry'. 'house.jpg' locked by user 'harry'.
锁定工作副本的一个被其它用户锁定的文件：
$ svn lock tree.jpg
svn: warning: Path '/tree.jpg is already locked by user 'sally in \
filesystem '/var/svn/repos/db'
$ svn lock --force tree.jpg
'tree.jpg' locked by user 'harry'.
没有工作副本的情况下锁定文件：
$ svn lock http://svn.red-bean.com/repos/test/tree.jpg 'tree.jpg' locked by user 'harry'.
更多细节见第 8 节 “锁定”。