Q:

Folder is locked and I can't unlock it

When I'm trying to update or commit code from a project it's telling me that the folder is locked. When I try to "release lock" it says that there's nothing to unlock in this working space. 
What does that mean? Why I can't update, commit or even clean up the project.

A:

Right click on your Subversion working directory folder, and select TortoiseSVN->Clean Up from the Context Menu. This will recurse it's way through your working directory and cleanup any incomplete actions, remove the local locks (which is different from using Subversion locking of a file in the repository which lets everyone know about the lock).
If that doesn't work, see if you can find the names of the files that were changed, but not yet committed, save them, and redo the checkout.

A:

If the file was locked by yourself(same svn account), you can follow these steps:
Right click on the locked file or folder, and select TortoiseSVN->Get lock... , and check on "[] Steal the locks" at the bottom left corner of the dialog, click "OK". If it complete successfully, that's ok. When you right click on the file again, you can see  TortoiseSVN->Release lock..., click to unlock.

A:

Using svn command line to unlock the local folders, just use svn cleanup.
Before:
# svn commit -m "fixing #1234"

# svn st

# svn cleanup
After:
# svn st

# svn commit -m "fixing #1234"

