腾讯云更改yum源

mv /etc/yum.repos.d/base.repo /etc/yum.repos.d/base.backup

[2] 进入yum源配置文件所在文件夹

[root@localhost yum.repos.d]# cd /etc/yum.repos.d/

[3] 下载阿里云的yum源配置文件，放入/etc/yum.repos.d/(操作前请做好相应备份)

[root@localhost yum.repos.d]# wget http://www.fzzsh.com/downloads/CentOS-Base.repo

[4] 运行yum makecache生成缓存

[root@localhost yum.repos.d]# yum makecache

[5] 更新系统

[root@localhost yum.repos.d]# yum -y update

[6] 安装lrzsl

[root@localhost ~]# yum -y install lrzsz