使用公钥

#生成密
ssh-keygen -o -t rsa -f ~/.ssh/my_id_rsa -N '密码'  -C '注释' 

#查看密钥文件，私钥 my_id_rsa，公钥 my_id_rsa.pub
ls ~/.ssh

#修改配置文件使用生成的密钥
echo -e "Host *\n\tStrictHostKeyChecking no\n\nIdentityFile ~/.ssh/my_id_rsa\n" > ~/.ssh/config

#将公钥传到服务器，然后登陆服务器，将公钥加入信任后就可以免密码登陆
scp ~/.ssh/my_id_rsa.pub <USER>@<HOST>:~/my_id_rsa.pub
ssh <USER>@<HOST>
cat ~/my_id_rsa.pub >> ~/.ssh/authorized_keys

#也可以直接用ssh-copy-id指令直接完成以上操作
ssh-copy-id -i ~/.ssh/my_id_rsa.pub <USER>@<HOST>

使用 sshpass 指令

sshpass -p <PASSWORD> ssh <USER>@<HOST>

sshpass 指令需要安装