-a -- all
-b -- escape
-c -- status change time
-d -- directory
-f -- no sort, all
-h -- human readable
-i -- inode
-k -- kilobytes
-l -- long
-m -- comma separated
-n -- numeric uid, gid
-o -- no group, long
-q -- hide control chars
-r -- reverse
-s -- size
-t -- sort by time
-u -- access time