Centos更換yum源，安裝ssh server

先連上網,然后更換yum源

1. 新建的用戶沒有sudo權限，所以首先切換到root用戶
su -
輸入密碼

2. 備份之前的yum源
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

3. 下載yum源centos6
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

4. 清理並生成緩存
yum clean all
yum makecache

 

安裝ssh server

$ yum search ssh
$ yum install openssh-server
$ chkconfig --list sshd
sshd      0:off    1:off    2:on    3:on    4:on    5:on    6:off