Committing is the act of finalising your changes for a revision of the repository and pushing those changes to the central server. Although not required, it is highly recommended to tie a general message about your changes to the revision log. This will make it easier for other users (or yourself) to track changes across revisions instead of manually handling diffs between files.
Perform a commit by executing the commit command as follows
svn commit REPOSITORY -m "MESSAGE"
REPOSITORY is your repository folder, e.g., ~/Documents/d445b.
MESSAGE is the message written to the log, e.g., "Finished abstract.".
Once the commit is finished executing others may update their repository to view the changes.
Omitting -m "MESSAGE" should make Subversion open a default text editor for a longer message, if necessary.