配置网卡

编辑网卡配置文件 vi /etc/sysconfig/network-scripts/ifcfg-xxxx
xxx为编辑的网卡名，通常已eth或者ens开头

  1. # Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)
  2. DEVICE=eth0
  3. BOOTPROTO=none
  4. ONBOOT=yes
  5. HWADDR=00:50:56:99:ff:e8
  6. NETMASK=255.255.255.0
  7. IPADDR=172.16.0.181
  8. GATEWAY=172.16.0.1
  9. TYPE=Ethernet
  10. USERCTL=no
  11. IPV6INIT=no
  12. PEERDNS=yes

重点关注下 GATEWAY和ONBOOT，修改完成后:wq保存
重新启动网络，systemctl restart network.service

查看网关

  1. netstat -r
  2. cat /etc/network/interfaces — Debian/Ubuntu Linux
  3. cat /etc/sysconfig/network-scripts/ifcfg-eth0 — Red Hat/CentOS