To grant permissions to a user you can follow those steps:

1- Changing File Permissions (chmod):

       - You can grant permissions to a user by changing the file permissions using the chmod command.

        - The chmod command uses a three-digit octal number to represent the permissions for Owner, Group, and Others. To grant specific permissions to a user, you can use commands like:

                * chmod u+r file.txt - Grants read permission to the owner of the file

                * chmod u+w file.txt - Grants write permission to the owner of the file

                * chmod u+x file.txt - Grants execute permission to the owner of the                         file

                  'u' here represent the username or the owner of the file.txt

                    Example: chmod s5derick rwx

                     this command will give the read write and execute permission to the                       s5derick user in file.txt

2- Changing File Ownership (chown):

       You can change the owner of a file using the chown command. Only the root user or a user with appropriate permissions can change the ownership of a file.

Example: sudo chown new_owner: new_group file.txt

                  sudo chown derick:devops file.txt

   Changes the owner of the file to new_owner and the group to new_group.

3- Changing File Group Ownership (chgrp)

You can change the group ownership of a file using the chgrp command.

Example: sudo chgrp new_group file.txt

                sudo chgrp devops file.txt

 Changes the group of the file to new_group.

Remember that managing permissions on Linux is based on the princip