Subversion: How to revert to a previous revision

Assume that your current revision is 100 and you want to revert the repository to the revision 90. Then you can use the following command,

$ svn merge -rHEAD:90 .

As you have used . at the end, it will revert your local repository. Once commited you will get a new revision such as 101 which is same as revision 90. You can do this directly to a remote repository as well. In that case, replace . with repository url.