The owner User of the file or the superuser can execute this command.Ĭhmod has two modes of operations, symbolic mode and numeric mode. To modify file permissions, we use chmod. Similarly for recursive operation, we would use: chgrp -R group_name dir #2: Change file and directory permissions: This is used just to change the group of a file.
chown -R user:group dir #1.2: Modifying Owner Group using chgrp: To recursively apply the new owner information on all subdirectories and files of a directory, we use it with -R parameter. The command would be: chown user_name:user_group file We can also combine owner group with the user_name using a colon (:), in order to change the Owner group in a single shot. The command above should change the owner of the file to user_name. The synopsis is to use the command followed by the username or ID of the new owner followed by the file path. The commands to use are chown and chgrp respectively. The superuser can modify the ownership information of a file, ie, s/he can change the User and Group owner of a file. But one thing, that is yet to explain, is the ways to modify the permissions and ownership information.Īs you have guessed, in this part we are going to look into chown, chgrp and chmod commands to see how exactly we are supposed to perform permission related operations. So last time, we talked about the concepts of File and Directory permissions and means to view them using terminal command ls -l.
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