1. Network card configuration file
/etc/sysconfig/network-scripts/ifcfg-ethxx
[yc@yc ~]$ cat /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE=Ethernet # device type
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=dhcp # Address allocation mode
DEFROUTE = yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE = yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33 # NIC name
UUID=87d7c3d6-fc84-4531-ac96-0f7e8c3b378e
DEVICE=ens33
ONBOOT=yes # Whether to start
IPADDR=192.168.0.101 # IP address
NETMASK=255.255.255.0 # subnet mask
GATEWAY=192.168.0.1 # Gateway address
DNS1=114.114.114.114 # DNS address
DNS2=114.114.115.115 # DNS address
2. DNS configuration file
/etc/resolv.conf
Note: After ifcfg-xxx is changed, the DNS configuration in it will overwrite resolv.conf. If there is no DNS in ifcfg, the nameserver in resolv.conf will be cleared.
[yc@yc ~]$ cat /etc/resolv.conf
# Generated by NetworkManager
search rhce
nameserver 114.114.114.114
nameserver 114.114.115.115
3. Hostname file
/etc/sysconfig/network
Mainly for the NETWORKING=yes # here must not be no whether the network works
appendix
1.Linux-network configuration (IP gateway dns configuration) network management
https://blog.csdn.net/wang740209668/article/details/53373425