ssh 直接使用 TTY 访问，以确保密码是用户键盘输入的。 sshpass 在专门的 tty 中运行 ssh，以误导 ssh 相信它是从用户接收到的密码，下面为大家详细讲解一下Linux下使用sshpass绕过SSH密码验证具体方法。
1. 安装
? Desktop sudo yum install sshpass
[sudo] password for xuyaowen:
Last metadata expiration check: 0:04:22 ago on Mon 02 Jul 2018 11:25:32 AM CST.
Package sshpass-1.06-5.fc28.x86_64 is already installed, skipping.
Dependencies resolved.
Nothing to do.
Complete!
检查是否安装
[root@yaowenxu Desktop]# rpm -qa sshpass
sshpass-1.06-5.fc28.x86_64
2. 查看 sshpass 命令帮助, 也可以使用 man sshpass
View Code
[root@yaowenxu Desktop]# sshpass
Usage: sshpass [-f|-d|-p|-e] [-hV] command parameters
-f filename Take password to use from file
-d number Use number as file descriptor for getting password
-p password Provide password as argument (security unwise)
-e Password is passed as env-var "SSHPASS"
With no parameters - password will be taken from stdin
-P prompt Which string should sshpass search for to detect a password prompt
-v Be verbose about what you're doing -h Show help (this screen) -V Print version information At most one of -f, -d, -p or -e should be used 3. 使用密码验证登录
? ~ sshpass -p 123 ssh root@10.66.65.15
4. ssh 第一次登录提示问题使用：
ssh -o StrictHostKeyChecking=no
来解决
? Desktop sshpass -p 123 ssh -o StrictHostKeyChecking=no root@10.66.8.142
Warning: Permanently added '10.66.8.142' (ECDSA) to the list of known hosts.
Last login: Mon Jul 2 10:51:29 2018
5. 优缺点
优点： 快速，便捷
缺点： 密码明文暴露，可以使用 history 命令查找到
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