Centos7.9虚拟机换源 固定IP 连接Xshell

CentOS 7 更换 清华大学 yum 软件源

进入目录

cd /etc/yum.repos.d/

备份一下CentOS-Base.repo文件

mv CentOS-Base.repo CentOS-Base.repo.bak

重新创建编辑CentOS-Base.repo文件

vim CentOS-Base.repo

将一下内容全部复制进去

[base]

name=CentOS-$releasever - Base

baseurl=https://mirrors.tuna./centos/$releasever/os/$basearch/

#mirrorlist=/?release=$releasever&arch=$basearch&repo=os

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#released updates

[updates]

name=CentOS-$releasever - Updates

baseurl=https://mirrors.tuna./centos/$releasever/updates/$basearch/

#mirrorlist=/?release=$releasever&arch=$basearch&repo=updates

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras

baseurl=https://mirrors.tuna./centos/$releasever/extras/$basearch/

#mirrorlist=/?release=$releasever&arch=$basearch&repo=extras

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus

baseurl=https://mirrors.tuna./centos/$releasever/centosplus/$basearch/

#mirrorlist=/?release=$releasever&arch=$basearch&repo=centosplus

gpgcheck=1

enabled=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

保存并退出，重新缓存

yum makecache

更新软件

yum -y upgrade

等待更新完成

注意：

yum -y update：升级所有包同时也升级软件和系统内核

yum -y upgrade：只升级所有包，不升级软件和系统内核

CentOS 7.9 固定IP连接Xshell

查看网卡和IP地址

ifconfig

如果找不到ifconfig命令，

执行 yum install net-tools 安装net-tools

修改网络配置文件ifcfg-ens33

vim /etc/sysconfig/network-scripts/ifcfg-ens33

下面是原文件内容

下面是修改后内容：

将自动获取IP改为手动，添加IP、网关、DNS解析，保存退出

修改后，一定要 重启网卡

service network restart

测试ping百度能否ping通

主机win+r 输入cmd

ping 192.168.174.130（虚拟机IP）

ping不通可能是网卡原因（重启虚拟机网卡网卡）或者是防火墙（关闭防火墙），一般都能ping通

systemctl stop firewalld.service 关闭防火墙

systemctl restart firewalld.servic 重启防火墙

查看ssh服务，有这两个服务就没问题

ps -ef | grep ssh

运行ssh服务

service sshd start

打开Xshell，新建连接，输入虚拟机IP，点击连接

接受并保存

输入登录用户

输入root密码

连接成功

下次再写Ubuntu20.04的了哦