Sticky bit

The sticky bit is a very interesting functionality. Let's say, in the administration department, there are 10 users. If one folder has been set with sticky bit, then all other users can copy files to that folder. All users can read the files, but only the owner of the respective file can edit or delete the file. Other users can only read, but not edit or modify, the files if the sticky bit is set:

    $ chmod +t filename

Alternatively, you can use the following command:

    $ chmod 1777

File permissions after any of the preceding two commands will be drwxrwxrwt.