配置文件
主机名
[waterruby@localhost ~]$ cat /etc/hostname
waterruby-server
主机名和 IP 地址的映射
[waterruby@localhost ~]$ cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
域名系统(DNS)解析器
[waterruby@localhost ~]$ cat /etc/resolv.conf
# Generated by NetworkManager
search waternet
nameserver 192.168.100.1