To rename a folder in Unix, you can use the mv command in the same way that you would use it to rename a file.
For example, to rename the folder oldname to newname, you can use the following command:
mv oldname newname
This will rename the folder oldname to newname in the current directory.
You can also use the mv command to move a folder to a different directory at the same time as renaming it. For example, to rename the folder oldname to newname and move it to the /tmp directory, you can use the following command:
mv oldname /tmp/newname
This will move the folder oldname to the /tmp directory and rename it to newname.
Note that the mv command will only rename the folder itself, not the files and subfolders inside it. If you want to rename the contents of the folder as well, you will need to use a separate command or a script to do so.
Overall, the mv command is a simple and powerful tool for renaming and moving folders in Unix.