how to use chmod in ubuntu cmd? code example

Example 1: chmode ubuntu

sudo chmod -R 777 /var/www

Example 2: ubuntu chmod codes

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