Five questions about modifying hostname under Linux (v)

Well, finally, the last of the series, let's explore the final question today.
Question 5: How to view the value of hostname, whichever is it?

1 [[email protected] ~]
2 # hostname
3 db-server
4 [[email protected] ~]
5 # more/proc/sys/kernel/hostname
6 db-server
7 [[email protected] ~]
8 # More/etc/sysconfig/network
Networking=yes
Networking_ipv6=yes
Hostname=localhost.localdomain
Whichever is the case, if you understand the previous 4 questions, then it is easy to understand the problem.
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Five questions about modifying hostname under Linux (v)