Linux实现免密码登录

本机node1

实现本机的免密码登录:

# ssh-keygen -t dsa -P ' ' -f ~/.ssh/id_dsa

# cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

将node的公钥复制到node4的/opt/中

# scp ./id_dsa.pub root@node4:/opt

node4中也要执行# ssh-keygen -t dsa -P ' ' -f ~/.ssh/id_dsa 目的是为了生成 .ssh文件夹

转到node4，执行cat  /opt/id_dsa.pub >> ~/.ssh/authorized_keys