hostname [option] [nameofhost]

Set or display name of current host system. A privileged user can set the hostname with the nameofhost argument.

Linux Commad Options:
-a, --alias
Display the alias name of the host (if used).
-d, --domain
Display DNS domain name.
-f, --fqdn, --long
Display fully qualified domain name.
-F file, --file file
Consult file for hostname.
-h, --help
Display a help message and then exit.
-i, --ip-address
Display the IP address(es) of the host.
-s, --short
Trim domain information from the display output.
-v, --verbose
Verbose mode.
-V, --version
Display version information and then exit.
-y, --yp, --nis
Display the NIS domain name. A privileged user can set a new NIS domain name with nameofhost.

Examples:

 hostname -i     Lookup local ip address (equivalent to host `hostname`)