How do I change the hostname of a Debian Linux system permanently using the command line tools?
You can use the hostname command to display or set the Debian Linyx system's host name as follows:
To change hostname to server2, enter:
$ hostname server2
How Do I Change Hostname Permanently?
Edit /etc/hostname, enter:
# vi /etc/hostname
Delete the existing name and replace it with a new name:
Save and close the file. You may also need to edit the /etc/hosts file, enter:
# vi /etc/hosts
Find all references to server1 and replace with server2:
127.0.0.1 localhost 127.0.1.1 server2 # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters
Save and close the file. Please note that the host name is usually set once at system startup in /etc/init.d/hostname.sh (normally by reading the contents of a file which contains the host name, e.g. /etc/hostname). Just type the following command to apply new changes without rebooting the server:
# /etc/init.d/hostname.sh start