How to Change the Hostname on Linux (hostnamectl, /etc/hostname & /etc/hosts)

• 23 June 2026
• by: Sofia Rossi
• in: Linux/Server Admin
• Tags: change hostname linux, fqdn, hostnamectl, linux server administration, systemd
• note: no comments

Learn how to change the hostname on Linux the modern way with hostnamectl, update /etc/hostname and /etc/hosts, set an FQDN, and avoid the ‘unable to resolve host’ error.

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