$HOSTNAME mismatch

Question

There are two different version of hostname on my system. This is a problem when trying to use wget against $HOSTNAME, which differs from what is expected.

[user@box ~]# wget https://$HOSTNAME/login.php
--2021-08-22 23:25:07--  https://superserver/login.php
Resolving superserver (superserver)... 11.22.33.44
Connecting to superserver (superserver)|11.22.33.44|:443... connected.
The certificate's owner does not match hostname ‘superserver’
[user@box ~]# echo $HOSTNAME
superserver
[user@box ~]# cat /proc/sys/kernel/hostname 
superserver.some.domain.com
[user@box ~]# 
[user@box ~]# hostname 
superserver.some.domain.com
[user@box ~]#

How do I update my system such that $HOSTNAME reflects what is in /proc/sys/kernel/hostname, and what appears when I issue hostname?

Or do I simply add a line in /etc/hosts?

Did you change the hostname *after* you started the shell session where you executed these commands? — muru, Aug 23 '21 at 03:58
Related: [unix.stackexchange.com/questions/239920](https://unix.stackexchange.com/questions/239920) — Freddy, Aug 23 '21 at 05:14

score 1 · Accepted Answer · edited Aug 23 '21 at 05:29

1

hostnamectl set-hostname superserver.some.domain.com
systemctl reboot now

edited Aug 23 '21 at 05:29

muru

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answered Aug 23 '21 at 05:07

Grace Thompson

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$HOSTNAME mismatch

1 Answers1