centos7初始安裝後配置dns與更新源與關閉防火牆

CentOS7 更新源

1、備份

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

2、下載新的CentOS-Base.repo 到/etc/yum.repos.d/

CentOS 6

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
或者

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
CentOS 7

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
或者

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

3、之後運行yum makecache生成緩存

Centos7 添加dns

nmcli connection show 查看當前啓動的連接eth0，根據自己實際情況

nmcli con mod eth0 ipv4.dns 114.114.114.114 更改dns

nmcli con up eth0 配置生效

Centos7關閉防火牆

查看防火牆狀態

firewall-cmd --state

關閉防火牆

systemctl stop firewalld.service

禁止防火牆開機自啓

systemctl disable firewalld.service