If the new directory name specified in the mv command already exists, the mv command will move the contents of the source directory into the existing directory rather than renaming it.
For example, if you run:
mv old_directory new_directoryAnd new_directory already exists, the contents of old_directory will be moved into new_directory, and old_directory will be effectively emptied. The old_directory itself will not be renamed or retained.
If you want to avoid this and ensure that the directory is renamed instead, make sure that the new directory name does not already exist.
