Objective
The objective is to change system's hostname on Ubuntu 18.04 Bionic Beaver Linux ( server or desktop )Operating System and Software Versions
- Operating System: - Ubuntu 18.04 Bionic Beaver
- Software: - systemd 235 or higher
Requirements
Privileged access to your Ubuntu System as root or viasudo
command is required. Difficulty
EASYConventions
- # - requires given linux commands to be executed with root privileges either directly as a root user or by use of
sudo
command - $ - requires given linux commands to be executed as a regular non-privileged user
Instructions
Obtain current hostname
Usehostnamectl
command to retrieve a current system hostname: $ hostnamectl Static hostname: ubuntu Icon name: computer-vm Chassis: vm Machine ID: ceb8b579410b472899a95049f8a61e05 Boot ID: 3f73eea15fb34a38937488149143d9d3 Virtualization: oracle Operating System: Ubuntu Bionic Beaver Kernel: Linux 4.13.0-32-generic Architecture: x86-64
Change Hostname
hostnamectl
command can also be used to set new or update the current hostname on Ubuntu 18.04 Bionic Beaver. The following linux command will change system's static hostname to linuxconfig
: $ sudo hostnamectl set-hostname linuxconfigFuthermore, check for the existence of
/etc/cloud/cloud.cfg
configuration. If the file exists edit the file and change the settings within: FROM: preserve_hostname: false TO: preserve_hostname: trueThe above will preserve your new hostname after reboot.
Next, confirm the new hostname:
$ hostnamectl Static hostname: linuxconfig Icon name: computer-vm Chassis: vm Machine ID: ceb8b579410b472899a95049f8a61e05 Boot ID: 3f73eea15fb34a38937488149143d9d3 Virtualization: oracle Operating System: Ubuntu Bionic Beaver Kernel: Linux 4.13.0-32-generic Architecture: x86-64Your command line prompt will update to reflect the new hostname settings the next time you login.
Appendix
You may also want to update your/etc/hosts
file so the system can resolve itself via new host name. Open /etc/hosts
file: $ sudo nano /etc/hostsand append your new hostnane right after the old hostname:
$ cat /etc/hosts 127.0.0.1 localhost 127.0.1.1 ubuntu linuxconfig # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback ff02::1 ip6-allnodes ff02::2 ip6-allrouters