-: **rw-** (//chmod 600//)
-Grants read and write permission of a file to the owner and nobody else.
-
-: **rwx** (//chmod 700//)
-Grants read, write and execute permission of a file to the owner and nobody
-else.
-
-: **r--** (//chmod 644//)
-Grants read and write permission of a file to the owner and read-only to
-anybody else.
-
-: **r-x** (//chmod 755//)
-Grants read, write and execute permission of a file to the owner and
-read-only plus execute permission to anybody else.
-