[CentOS7] OS 설치 후 yum 을 실행했으나, 네트워크이슈로 실패했다.

CentOS 7 을 설치하고, yum update 를 실행해 보았으나, Could not resolve host 에러가 발생하며 실패했다.

[me@localhost ~]$ sudo yum update
[sudo] password for me: 
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"

• https://www.youtube.com/watch?v=y5H0AaI9OyM

[me@localhost ~]$ nmcli d
DEVICE      TYPE      STATE         CONNECTION 
virbr0      bridge    connected     virbr0     
enp0s3      ethernet  disconnected  --         
lo          loopback  unmanaged     --         
virbr0-nic  tun       unmanaged     --   

enp0s3 가 disconnected 상태.

# nmtui

nmtui 를 이용해 enp0s3를 자동연결로 세팅한다.

• seel also : https://onedaystudy.tistory.com/109 : name server 세팅이 안 되어있을 때.