修改文件
# vi /etc/hosts
添加地址和別名
192.168.222.126 s1 ##前面是機器ip，后面是別名
測試
[root@bogon /]# ping s1
PING s1 (192.168.222.126) 56(84) bytes of data.
64 bytes from s1 (192.168.222.126): icmp_seq=1 ttl=64 time=0.204 ms
64 bytes from s1 (192.168.222.126): icmp_seq=2 ttl=64 time=0.955 ms
64 bytes from s1 (192.168.222.126): icmp_seq=3 ttl=64 time=0.882 ms
64 bytes from s1 (192.168.222.126): icmp_seq=4 ttl=64 time=0.583 ms