在Linux中修改主机名其实是一件非常容易的事情，但网上有些帖子在这一块都说得很复杂，诸如修改什么配置文件之类的等等，用hostname这个命令我们就可以很轻易地修改了。
我们直接运行hostname可以查看目前的主机名称，要查看hostname的其它命令参数，运行hostname -h如下：
Usage: hostname [-v] {hostname|-F file} set hostname (from file)
domainname [-v] {nisdomain|-F file} set NIS domainname (from file)
hostname [-v] [-d|-f|-s|-a|-i|-y|-n] display formatted name
hostname [-v] display hostname/p>
p>hostname -V|–version|-h|–help print info and exit/p>
p>dnsdomainname=hostname -d, {yp,nis,}domainname=hostname -y/p>
p>-s, –short short host name
-a, –alias alias names
-i, –ip-address addresses for the hostname
-f, –fqdn, –long long host name (FQDN)
-d, –domain DNS domain name
-y, –yp, –nis NIS/YP domainname
-F, –file read hostname or NIS domainname from given file/p>
p>This command can read or set the hostname or the NIS domainname. You can
also read the DNS domain or the FQDN (fully qualified domain name).
Unless you are using bind or NIS for host lookups you can change the
FQDN (Fully Qualified Domain Name) and the DNS domain name (which is
part of the FQDN) in the /etc/hosts file.
看到-v的用法了吗？修改主机名命令如下：
hostname -v 新的主机名
这样就可以了，是不是非常地简单？
