When you find that the Linux system is not online, you can ...

Three parsing methods for DNS parsing of Llinux:

1, the local DNS domain name resolution: vim/etc/hosts

Add rule: (for example) 10.10.10.131 www.fangwenchen.com

2. Network card Configuration file DNS service address:

Vim/etc/sysconfig/network-scripts/ifcfg-eth0

Add rule: dns=114.114.114.114

3. System default DNS configuration:

Vim/etc/resolv.conf
Added: NameServer 114.114.114.114

Priority of System resolution: 1>2>3

4: If Yum downloads software mirror error, view Yum.repo:
Vim/etc/yum.repo/local.repo
Change the BaseURL to NetEase's open source mirror station.

When you find that the Linux system is not online, you can ...