如何检查主机是否在您的known_host ssh中 [英] how to check if a host is in your known_host ssh

问题描述

我在脚本中执行以下命令，该命令将主机添加到ssh中的已知主机.

I have the following command works in my script that adds the host to the known hosts in ssh.

VAR2=$(expect -c '
 spawn ssh -o StrictHostKeyChecking=no '"$REMOTE_HOST_USER@$REMOTE_HOST_IP"'
 expect "*?assword:*"
 send "'"$REMOTE_HOST_PASSWD"'\r"
 expect { 
 "Permission denied, please try again." {
 exit '"$WRONG_PASSWORD"' 
 }
 }
 ')

工作正常，但是如果主机已经在known_hosts中，则我需要在命令之前进行控制，如果主机已经在known_hosts中，则不执行命令.如何检查主机是否在known_hosts中?

Works fine, but I need to control before the command if the host is already in known_hosts and not execute command if it is already in known_hosts. How can i check if an host is in known_hosts?

推荐答案

尝试: ssh-keygen -F< hostname>

如果找到主机名指纹并且命令返回 0 ，则将显示 known_hosts 行，否则不显示任何内容，并且命令返回 1 .

Will show the known_hosts line(s) if the hostname fingerprint is found and the command returns 0, otherwise nothing is shown and the command returns 1.

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