Difference between revisions of "Linux hostname"
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= 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 = | |||
<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 = | |||
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 | ||
Revision as of 21:32, 3 April 2019
Debian based
In CentOS/Ubuntu and other distros you can control hostname using:
$ hostnamectl set-hostname <new hostname> #in CentOS 7 changes /etc/hostname file that stores centrally the system's hostname
RPM based
In Redhat (RPM) based distros change the hostname permanently by editing:
$ vi /etc/sysconfig/network NETWORKING=yes HOSTNAME=newHostName # requires a reboot for eg. Amazon Linux
Amazon Linux AMI
sudo vi /etc/sysconfig/network HOSTNAME=webserver.mydomain.com # reboot
Amazon Linux 2
Change the system hostname to a public DNS name
sudo hostnamectl set-hostname webserver.mydomain.com # reboot
Other
In other distros it should be enough to change:
$ vi /etc/hosts 127.0.0.1 ''newHostName'' 127.0.0.1 localhost localhost.localdomain ::1 localhost localhost.localdomain
Ubuntu >14.04
$ vi /etc/hosts 127.0.0.1 localhost 127.0.1.1 ''newHostName'' ''newHostName''.home
Temp hostname
Temporarily changing hostname can be achieved by the command below then logout and login again to see the effect in bash.
$ hostname newHostName
Restart networking
If you changed /etc/hosts or /etc/sysconfig/network file you want to restart networking to ensure that changes will be persistent on reboot:
$ /etc/init.d/network restart # Redhat based $ sudo service networking restart # Debian/Ubuntu distros