centOS7修改主机名

阿里云ecs上centOS的名字太长了，然后看上去比较乱，于是，改一下名字：

[Abble@izuf60gbaaaq66y42r6y2fz root]$ hostnamectl set-hostname  centOS7
==== AUTHENTICATING FOR org.freedesktop.hostname1.set-static-hostname ===
Authentication is required to set the statically configured local host name, as well as the pretty host name.
Authenticating as: root
Password: 
==== AUTHENTICATION COMPLETE ===
[Abble@izuf60gbaaaq66y42r6y2fz root]$ 

改完后，重新ssh登陆：

➜  htdocs ssh Abble@139.196.98.111
Abble@139.196.98.111's password: 
Last login: Sun May  6 00:32:58 2018

Welcome to Alibaba Cloud Elastic Compute Service !

[Abble@centos7 ~]$ 
[Abble@centos7 ~]$ 
[Abble@centos7 ~]$ 

还是新名字看着舒服。

附加：以前总认为linux上密码不出现*号是反人类设计，和thinkPHP3上的单字母函数平起平坐（虽然主流观点上有一大堆各种言之凿凿的理由）。但是，现在看上面的复制，总有一种莫名其妙的美感。