设置主机名称
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hostnamectl set-hostname yourhostname
bash
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查看版本
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| cat /etc/redhat-release
uname -a
uname -r
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配置固定 ip
编辑：vi /etc/sysconfig/network-scripts/ifcfg-ens0s8
(注意：ens0s8 这个名字要和 ip addr中的名字保持一致，如果不一样修改文件名即可，否则会重启失败)
默认
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| TYPE=Ethernet
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=enp0s8
UUID=ed6c068c-149c-4678-8a13-d6e34a5d50c9
DEVICE=enp0s8
ONBOOT=yes
DNS1=10.0.2.2
DNS2=8.8.8.8
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自定义
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| TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=enp0s8
UUID=ed6c068c-149c-4678-8a13-d6e34a5d50c9
DEVICE=enp0s8
ONBOOT=yes
IPADDR=172.20.130.84
GATEWAY=172.20.130.1
DNS1=10.0.2.2
DNS2=8.8.8.8
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重启： systemctl restart network
关闭防火墙
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| systemctl status firewalld
systemctl stop firewalld
systemctl disable firewalld
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免密登录
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| ssh-copy-id -i ~/.ssh/id_rsa.pub root@172.20.130.84
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