1. 修改主機名字hostname

[[email protected]]$ sudo vi /etc/sysconfig/network

We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:

    #1) Respect the privacy of others.
    #2) Think before you type.
    #3) With great power comes great responsibility.

[sudo] password for note1:#在這裡輸入密碼
#Created by anaconda
HOSTNAME=note（新增這一行）
#新增上面的這行文字然後按ctrl+c,輸入":wq"按enter建退出
~
~
~
"/etc/hosts" 5L, 221C written
[
 
[email protected]]$su - root (獲取root許可權)
Password: (輸入root的密碼)
Last login: Wed Sep 26 07:14:35 ADT 2018 on pts/0
[[email protected]~]# hostname note（執行）
[[email protected]~]# su - note1
Last login: Wed Sep 26 07:15:37 ADT 2018 on pts/0
[[email protected]~]$

2. 修改ip地址與主機名對映

[[email protected]
 
 ~]$ sudo vi /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.16.100 note1(新增這一行，當然你也可以新增多臺主機名的對映)
~
~

"/etc/hosts" 3L, 179C written
[[email protected] ~]$ ping note1（最後ping就能ping到了）
PING note1 (192.168.16.100) 56(84) bytes of data.
64 bytes from note1 (192.168.16.100): icmp_seq=1 ttl=64 time=0.090 ms
64 bytes from note1 (192.168.16.100): icmp_seq=2 ttl=64 time=0.035 ms
64 bytes from note1 (192.168.16.100): icmp_seq=3 ttl=64 time=0.035 ms
64 bytes from note1 (192.168.16.100): icmp_seq=4 ttl=64 time=0.035 ms
64 bytes from note1 (192.168.16.100): icmp_seq=5 ttl=64 time=0.069 ms
64 bytes from note1 (192.168.16.100): icmp_seq=6 ttl=64 time=0.036 ms
64 bytes from note1 (192.168.16.100): icmp_seq=7 ttl=64 time=0.058 ms