Ans: 'cd' command is basically used for change directory.

The various use of ‘cd’ command are:

Cd (also chdir in some shells) --> change directory

Cd/ -->changes directory to the system's root

Cd... -->goes up one directory level

Cd. /. -->goes up two directory levels

Cd /full/path/name/from/root --> changes directory to absolute path named (note the leading slash)

Cd path/from/current/location --> changes directory to path relative to current location (no leading slash)

Cd ~username/directory --> changes directory to the named username's indicated directory