You will most probably need to exit the current shell in order to see the change in your shell prompt. This is active right away and will remain like that until the system will be rebooted (because at system boot it will set this from some particular file configurations – see bellow how to set this permanently). Will set the hostname of the system to NEW_NAME. It will output the fully qualified domain name (or FQDN) of the system. Without any parameter it will output the current hostname of the system. On any Linux system you can change its hostname with the command ‘hostname‘. Normally we will set the hostname of a system during the installation process.Ĭhange the hostname on a running Linux system If the above commands return correctly with no errors then all may be well however, you may want to read on to verify that all settings are correct. Sysctl kernel.hostname=NEW_HOSTNAMEto change it.First, see if your host name is set correclty using the following commands: This is set using the init script /etc/rc.d/rc.sysinitįORWARD_IPV4=”yes”So in order to preserve your change on system reboot edit this file and enter the appropriate name using the HOSTNAME variable. RedHat based system use the file /etc/sysconfig/network to read the saved hostname at system boot. The hostname saved in this file (/etc/hostname) will be preserved on system reboot (and will be set using the same script we used hostname.sh). etc/init.d/hostname.sh startto make the change active. hostname= NEW_HOSTNAMEto change it.ĭebian based systems use the file /etc/hostname to read the hostname of the system at boot time and set it up using the init script /etc/init.d/hostname.sh Sysctl kernel.hostnameto read the current hostname, and Why would someone need a different method of doing the same thing as above? No idea, but here is anyway: use sysctl to change the variable kernel.hostname: d/rc.sysinitįORWARD_ IPV4=”yes” So in order to preserve your change on system reboot edit this file and enter the appropriate name using the HOSTNAME variable. This is set using the init script /etc/rc. RedHat based system use the file /etc/sysconfig/ network to read the saved hostname at system boot. Permanent hostname change on RedHat based systems ServerSo on a Debian based system we can edit the file /etc/hostname and change the name of the system and then run: Permanent hostname change on Debian based systemsĭebian based systems use the file /etc/hostname to read the hostname of the system at boot time and set it up using the init script /etc/init. This is active right away and will remain like that until the system will be rebooted (because at system boot it will set this from some particular file configurations - see bellow how to set this permanently). Will output the fully qualified domain name (or FQDN) of the system. On any Linux system you can change its hostname with the command ‘hostname‘ (surprised?)… Here are some quick usages of the command line hostname: For me, it is important to see on each one of the ssh screens I will have open at any time a different hostname that is relevant and will give me quickly the information on what system I am logged in. Many peoples don’t care about this, and don’t change the hostname even if for example this was set to something really stupid by the datacenter that installed the system (most likely they will set this to “debian” on any debian installation, etc). Normally we will set the hostname of a system during the installation process. How to change the hostname of a Linux system
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