"If you ever tried to work with Linux command line, ls command
was surely one of the first commands you have executed. In fact, ls
command is so frequently used, that its name is often considered as
the best choice to name a Trojan Horse. Even though you use ls
command on daily basis, its wast number of options always makes you
to reach for ls's manual page. Doing so you learn something new
every time you open ls's manual page .