intrin@decoded:/var/www$ ls -la
total 20
drwxrwsr-x  4 www-data www-data 4096 Nov 26 14:33 .
drwxr-xr-x 14 root     root     4096 Nov 25 15:20 ..
drwxrwxr-x  5 www-data www-data 4096 Nov 26 14:21 drawing
-rwxrwxr-x  1 www-data www-data  177 Nov 13 09:47 index.html
drwxrwxr-x  7 www-data www-data 4096 Nov 26 15:02 smarty
intrin@decoded:/var/www$ sudo useradd -G www-data intrin
useradd: user 'intrin' already exists