ways to check the hostname on a linux system :

[sven_sim]

The system hostname is maintained by the kernel.
Suppose you have changed the hostname of your system and you want to confirm that the change has taken place , you can check the hostname through the following commands :-

E.x.
[root@server ~]# hostname
test.example.net


[root@server ~]# uname -n
test.example.net

[root@server ~]# cat /proc/sys/kernel/hostname
test.example.net

[root@server ~]# sysctl kernel.hostname
kernel.hostname = test.example.net

It may vary based on the different linux distributions.
If there are any more ways please post them as well ...

[Kristian0911]

You can also check Hostname by executing the following command as :

cat /etc/hosts

You will get the IP address assigned to the Hostname.

cat /etc/sysconfig/network

You will get Hostname entry as :

HOSTNAME="yourserver.com"

Thanks.