#hostname 理解

https://www.cnblogs.com/kerrycode/p/3595724.html#undefined

[root@dev ~]# hostname 
 
dev
 
[root@dev ~]# more /proc/sys/kernel/hostname 
 
dev 
 
[root@dev ~]# more /etc/sysconfig/network 
 
NETWORKING=yes 
 
NETWORKING_IPV6=yes 
 
HOSTNAME=localhost.localdomain

如果有/etc/hostname 时候,会先用这个