Changing your hostname is not always trivial. Over time it permeates
to various files in /etc. But the starting point to changing
your hostname, for example from porsche to zafira is:
To ensure the changed hostname will survive a reboot edit
/etc/hostname to make the same change. This is where the name
is obtained at boot time.
Then search through /etc for occurrences of the old name,
just in case:
# grep -r -n porsche /etc
Typically you will find the hostname hardwired in /etc/hosts,
/etc/mailname, /etc/motd, and various apache, ppp,
ssh, and exim
files, depending on your setup. These can
probably be edited by hand to replace the hostname.
While these changes can generally be made without any problem, there
are rare occasions where the next reboot might complain. It's useful
to be careful, but not concerned!
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