一條命令配置好ssh免密登陸

無跳板機

ssh $user@$target -p 1220 'mkdir -p .ssh && cat > .ssh/authorized_keys' < ~/.ssh/id_rsa.pub

user是登陸名,target是目標機器.第一次輸好密碼,後面就不用輸了.

經過跳板機

• 在~/.ssh/config中配置好別名

Host gateway
    HostName gateway url
    Port 1220
    IdentityFile ~/.ssh/id_rsa
    User xxx

Host target
    HostName target url
    User xxx
    IdentityFile ~/.ssh/id_rsa
    ProxyCommand ssh gateway nc %h %p 2> /dev/null

• 執行命令

ssh target 'mkdir -p .ssh && cat > .ssh/authorized_keys' < ~/.ssh/id_rsa.pub

和上面同樣,也只須要第一次輸入密碼