hostname - Unix, Linux Command


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NAME

hostname - show or set the system's host name.

SYNOPSIS

hostname [-v] [-a] [--alias] [-d] [--domain] [-f] [--fqdn] [-A] [--all-fqdns] [-i] [--ip-address] [-I] [--all-ip-addresses] [--long] [-s] [--short] [-y] [--yp] [--nis]

hostname [-v] [-F filename] [--file filename] [hostname]

hostname [-v] [-h] [--help] [-V] [--version]

DESCRIPTION

Hostname is the program that is used to either set or display the current host, domain or node name of the system. These names are used by many of the networking programs to identify the machine.

OPTIONS

TAG DESCRIPTION
-a, --alias Display the alias name of the host (if used).
-d, --domain Display the name of the DNS domain. Don't use the command domainname to get the DNS domain name because it will show the NIS domain name and not the DNS domain name. Use dnsdomainname instead.

-F, --file filename Read the host name from the specified file. Comments (lines starting with a '#') are ignored.
-f, --fqdn, --long Display the FQDN (Fully Qualified Domain Name). A FQDN consists of a short host name and the DNS domain name. Unless you are using bind or NIS for host lookups you can change the FQDN and the DNS domain name (which is part of the FQDN) in the /etc/hosts file. See the warnings in section THE FQDN above, and avoid using this option; use hostname --all-fqdns instead.
-A, --all-fqdns Displays all FQDNs of the machine. This option enumerates all configured network addresses on all configured network interfaces, and translates them to DNS domain names. Addresses that cannot be translated (i.e. because they do not have an appropriate reverse DNS entry) are skipped. Note that different addresses may resolve to the same name, therefore the output may contain duplicate entries. Do not make any assumptions about the order of the output..
-h, --help Print a usage message and exit.
-i, --ip-address Display the IP address(es) of the host. Note that this works only if the host name can be resolved. Avoid using this option; use hostname --all-ip-addresses instead.

Files cannot be extracted from a thin hostnamechive.
-I, --all-ip-addresses Display all network addresses of the host. This option enumerates all configured addresses on all network interfaces. The loopback interface and IPv6 link-local addresses are omitted. Contrary to option -i, this option does not depend on name resolution. Do not make any assumptions about the order of the output.
-s, --short Display the short host name. This is the host name cut at the first dot.
-V, --version Print version information on standard output and exit successfully.
-v, --verbose Be verbose and tell what's going on.
-y, --yp, --nis Display the NIS domain name. If a parameter is given (or --file name ) then root can also set a new NIS domain.

EXAMPLES

Example-1:

To print the hostname of the system :

$ hostname

output:

# hostname
testserver.tutorialspoint.com

Example-2:

To print IP address of the computer :

$ hostname -i

output:

192.168.134.128

Example-3:

To print the domain name :

$ hostname -d

output:

tutorialspoint.com

Example-4:

To print short hostname :

$ hostname -s

output:

testserver



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