Linux hostname - Revision history

Pio2pio: /* RPM based */

2019-04-03T20:06:39Z

RPM based

@@ Line 13: / Line 13: @@
 HOSTNAME=newHostName
 # requires a reboot for eg. Amazon Linux
 </source>

Pio2pio: /* Debian based */

2019-04-03T19:58:33Z

Debian based

← Older revision		Revision as of 21:58, 3 April 2019
Line 2:		Line 2:
	In CentOS/Ubuntu and other distros you can control <tt>hostname</tt> using:		In CentOS/Ubuntu and other distros you can control <tt>hostname</tt> using:
	<source lang=bash>		<source lang=bash>
	sudo hostnamectl set-hostname <new hostname> ~~#in CentOS 7 it updates also /etc/hostname file that stores centrally the system's hostname~~		sudo hostnamectl set-hostname <new hostname>
	</source>		</source>
			In CentOS 7 it updates also /etc/hostname file that stores centrally the system's hostname

	= RPM based =		= RPM based =

Pio2pio at 19:58, 3 April 2019

2019-04-03T19:58:11Z

← Older revision		Revision as of 21:58, 3 April 2019
Line 2:		Line 2:
	In CentOS/Ubuntu and other distros you can control <tt>hostname</tt> using:		In CentOS/Ubuntu and other distros you can control <tt>hostname</tt> using:
	<source lang=bash>		<source lang=bash>
	sudo hostnamectl set-hostname <new hostname>		sudo hostnamectl set-hostname <new hostname> #in CentOS 7 it updates also /etc/hostname file that stores centrally the system's hostname
			</source>

			= RPM based =
			In Redhat (RPM) based distros change the hostname permanently by editing:
			<source lang=bash>
			$ vi /etc/sysconfig/network
			NETWORKING=yes
			HOSTNAME=newHostName
			# requires a reboot for eg. Amazon Linux
	</source>		</source>
	~~In CentOS 7 it updates also /etc/hostname file that stores centrally the system's hostname~~

	= Amazon Linux AMI =		= Amazon Linux AMI =

Pio2pio: /* Debian based */

2019-04-03T19:54:38Z

Debian based

← Older revision		Revision as of 21:54, 3 April 2019
Line 2:		Line 2:
	In CentOS/Ubuntu and other distros you can control <tt>hostname</tt> using:		In CentOS/Ubuntu and other distros you can control <tt>hostname</tt> using:
	<source lang=bash>		<source lang=bash>
	sudo hostnamectl set-hostname <new hostname> ~~#in CentOS 7 it updates also /etc/hostname file that stores centrally the system's hostname~~		sudo hostnamectl set-hostname <new hostname>
	</source>		</source>
			In CentOS 7 it updates also /etc/hostname file that stores centrally the system's hostname

	= Amazon Linux AMI =		= Amazon Linux AMI =

Pio2pio: /* Debian based */

2019-04-03T19:54:14Z

Debian based

← Older revision		Revision as of 21:54, 3 April 2019
Line 3:		Line 3:
	<source lang=bash>		<source lang=bash>
	sudo hostnamectl set-hostname <new hostname> #in CentOS 7 it updates also /etc/hostname file that stores centrally the system's hostname		sudo hostnamectl set-hostname <new hostname> #in CentOS 7 it updates also /etc/hostname file that stores centrally the system's hostname
	~~<source lang=bash>~~

	~~= RPM based =~~
	~~In Redhat (RPM) based distros change the hostname permanently by editing:~~
	~~<source lang=bash>~~
	~~$ vi /etc/sysconfig/network~~
	~~NETWORKING=yes~~
	~~HOSTNAME=newHostName~~
	~~# requires a reboot for eg. Amazon Linux~~
	</source>		</source>

Pio2pio: /* Debian based */

2019-04-03T19:53:58Z

Debian based

← Older revision		Revision as of 21:53, 3 April 2019
Line 1:		Line 1:
	= Debian based =		= Debian based =
	In CentOS/Ubuntu and other distros you can control <tt>hostname</tt> using:		In CentOS/Ubuntu and other distros you can control <tt>hostname</tt> using:
	~~$ '''~~hostnamectl set-hostname~~''' ''~~<new hostname>'' #in CentOS 7 ~~changes <tt>'''~~/etc/hostname~~'''</tt>~~ file that stores centrally the system's hostname		<source lang=bash>
			sudo hostnamectl set-hostname <new hostname> #in CentOS 7 it updates also /etc/hostname file that stores centrally the system's hostname
			<source lang=bash>

	= RPM based =		= RPM based =

Pio2pio: /* Amazon Linux AMI */

2019-04-03T19:37:06Z

Amazon Linux AMI

← Older revision		Revision as of 21:37, 3 April 2019
Line 14:		Line 14:
	= Amazon Linux AMI =		= Amazon Linux AMI =
	<source lang=bash>		<source lang=bash>
			# change to public DNS name
	sudo vi /etc/sysconfig/network		sudo vi /etc/sysconfig/network
	HOSTNAME=webserver.mydomain.com		HOSTNAME=webserver.mydomain.com
			# or without public dns name
			HOSTNAME=webserver.localdomain
	# reboot		# reboot
	</source>		</source>

Pio2pio at 19:32, 3 April 2019

2019-04-03T19:32:33Z

← Older revision		Revision as of 21:32, 3 April 2019
Line 1:		Line 1:
			= Debian based =
	In CentOS/Ubuntu and other distros you can control <tt>hostname</tt> using:		In CentOS/Ubuntu and other distros you can control <tt>hostname</tt> using:
	$ '''hostnamectl set-hostname''' ''<new hostname>'' #in CentOS 7 changes <tt>'''/etc/hostname'''</tt> file that stores centrally the system's hostname		$ '''hostnamectl set-hostname''' ''<new hostname>'' #in CentOS 7 changes <tt>'''/etc/hostname'''</tt> file that stores centrally the system's hostname

			= RPM based =
	In Redhat (RPM) based distros change the hostname permanently by editing:		In Redhat (RPM) based distros change the hostname permanently by editing:
	<source lang=bash>		<source lang=bash>
Line 10:		Line 12:
	</source>		</source>

			= Amazon Linux AMI =
			<source lang=bash>
			sudo vi /etc/sysconfig/network
			HOSTNAME=webserver.mydomain.com
			# reboot
			</source>

			= Amazon Linux 2 =
			Change the system hostname to a public DNS name
			<source lang=bash>
			sudo hostnamectl set-hostname webserver.mydomain.com
			# reboot
			</source>

			= Other =
	In other distros it should be enough to change:		In other distros it should be enough to change:
	<source lang=bash>		<source lang=bash>
Line 19:		Line 35:
	</source>		</source>

			= Ubuntu >14.04 =
	In Ubuntu >14.04
	<source lang=bash>		<source lang=bash>
	$ vi /etc/hosts		$ vi /etc/hosts
Line 27:		Line 42:
	</source>		</source>

			= Temp hostname =
	Temporarily changing <tt>hostname</tt> can be achieved by the command below then logout and login again to see the effect in bash.		Temporarily changing <tt>hostname</tt> can be achieved by the command below then logout and login again to see the effect in bash.
	$ '''hostname''' ''newHostName''		$ '''hostname''' ''newHostName''

	;Restart networking		= Restart networking =
	If you changed <tt>'''/etc/hosts'''</tt> or <tt>'''/etc/sysconfig/network'''</tt> file you want to restart networking to ensure that changes will be persistent on reboot:		If you changed <tt>'''/etc/hosts'''</tt> or <tt>'''/etc/sysconfig/network'''</tt> file you want to restart networking to ensure that changes will be persistent on reboot:
	$ /etc/init.d/network restart # Redhat based		$ /etc/init.d/network restart # Redhat based
	$ sudo service networking restart # Debian/Ubuntu distros		$ sudo service networking restart # Debian/Ubuntu distros

Pio2pio at 10:44, 15 March 2019

2019-03-15T10:44:08Z

← Older revision		Revision as of 12:44, 15 March 2019
Line 3:		Line 3:

	In Redhat (RPM) based distros change the hostname permanently by editing:		In Redhat (RPM) based distros change the hostname permanently by editing:
	$ ~~'''~~vi /etc/sysconfig/network~~'''~~		<source lang=bash>
	NETWORKING=yes		$ vi /etc/sysconfig/network
	HOSTNAME=''newHostName''		NETWORKING=yes
			HOSTNAME=newHostName
			# requires a reboot for eg. Amazon Linux
			</source>


	In other distros it should be enough to change:		In other distros it should be enough to change:
	$ ~~'''~~vi /etc/hosts~~'''~~		<source lang=bash>
	127.0.0.1 ''newHostName''		$ vi /etc/hosts
	127.0.0.1 localhost localhost.localdomain		127.0.0.1 ''newHostName''
	::1 localhost localhost.localdomain		127.0.0.1 localhost localhost.localdomain
			::1 localhost localhost.localdomain
			</source>


	In Ubuntu >14.04		In Ubuntu >14.04
	$ ~~'''~~vi /etc/hosts~~'''~~		<source lang=bash>
	127.0.0.1 localhost		$ vi /etc/hosts
	127.0.1.1 ''newHostName'' ''newHostName''.home		127.0.0.1 localhost
			127.0.1.1 ''newHostName'' ''newHostName''.home
			</source>


	Temporarily changing <tt>hostname</tt> can be achieved by the command below then logout and login again to see the effect in bash.		Temporarily changing <tt>hostname</tt> can be achieved by the command below then logout and login again to see the effect in bash.

Pio2pio at 08:46, 4 March 2016

2016-03-04T08:46:35Z

← Older revision		Revision as of 10:46, 4 March 2016
Line 1:		Line 1:
	In CentOS and ~~some~~ other distros you can control <tt>hostname</tt> using:		In CentOS/Ubuntu and other distros you can control <tt>hostname</tt> using:
	$ '''hostnamectl set-hostname''' ''<new hostname>'' #in CentOS 7 changes <tt>'''/etc/hostname'''</tt> file that stores centrally the system's hostname		$ '''hostnamectl set-hostname''' ''<new hostname>'' #in CentOS 7 changes <tt>'''/etc/hostname'''</tt> file that stores centrally the system's hostname

Line 12:		Line 12:
	127.0.0.1 localhost localhost.localdomain		127.0.0.1 localhost localhost.localdomain
	::1 localhost localhost.localdomain		::1 localhost localhost.localdomain

			In Ubuntu >14.04
			$ '''vi /etc/hosts'''
			127.0.0.1 localhost
			127.0.1.1 ''newHostName'' ''newHostName''.home

	Temporarily changing <tt>hostname</tt> can be achieved by the command below then logout and login again to see the effect in bash.		Temporarily changing <tt>hostname</tt> can be achieved by the command below then logout and login again to see the effect in bash.