Linux File System 02 - bin directory

/bin - In contrast to /sbin, the bin directory contains several useful
commands that are used by both the system administrator as well as
non-privileged users. This directory usually contains the shells like
bash, csh etc. as well as much used commands like cp, mv, rm, cat, ls.
There also is /usr/bin, which contains other user binaries. These binaries
on the other hand are not essential for the user. The binaries in /bin
however, a user cannot do without.