chmod permissions table code example

Example 1: octal chmod

0 ---
1 --x
2 -w- 
3 -wx
4 r--
5 r-x
6 rw-
7 rwx

1 - x
2 - w
4 - r

Example 2: chmod values

The three rightmost digits define permissions for the:
file user, the group, and others. 

Example usage: sudo chmod 777 testfile.txt

#	Permission				rwx	Binary
7	read, write and execute	rwx	111
6	read and write			rw-	110
5	read and execute		r-x	101
4	read only				r--	100
3	write and execute		-wx	011
2	write only				-w-	010
1	execute only			--x	001
0	none					---	000