> On 12 May 2025, at 1:16 PM, Julian Swagemakers <julian@xxxxxxxxxxxxxxx> wrote: > > On Sat May 10, 2025 at 9:37 AM CEST, Aditya Garg wrote: >> `hostname` is a popular command available on both Linux and macOS. As >> per the man-page[1], `hostname --fqdn` command returns the fully >> qualified domain name (FQDN) of the system. > > There are multiple implementations of the hostname command, and they > don't all support `--fqdn`. For example this will not work on Alpine > Linux as well as macOS. > > macOS: > > $ hostname --fqdn > hostname: illegal option -- - > usage: hostname [-f] [-s | -d] [name-of-host] > > Alpine: > > $ hostname --fqdn > hostname: unrecognized option: fqdn > BusyBox v1.37.0 (2025-01-17 18:12:01 UTC) multi-call binary. > > Usage: hostname [-sidf] [HOSTNAME | -F FILE] > > Show or set hostname or DNS domain name > > -s Short > -i Addresses for the hostname > -d DNS domain name > -f Fully qualified domain name > -F FILE Use FILE's content as hostname > > All seem to support `-f` though, maybe that would be the better option. Sure. I was using -f before, but thought --fqdn would be more intuitive for anyone reading the code. Didn't know its not supported every where.
