bash 使用“expect”命令将密码传递给 SSH 远程运行脚本
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Using 'expect' command to pass password to SSH running script remotely
提问by Acrid_Soul
I need to create a bash script that will remotely run another script on a batch of machines. To do so I am passing a script through SSH.
我需要创建一个 bash 脚本，该脚本将在一批机器上远程运行另一个脚本。为此，我通过 SSH 传递了一个脚本。
ssh -p$port root@$ip 'bash -s' < /path/to/script/test.sh
I thought it would use my RSA keys but I am getting error:
我以为它会使用我的 RSA 密钥，但出现错误：
"Enter password: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)"
I tried using sshpass to no avail. So my next solution was using expect. I have never used expect before and I'm positive my syntax is way off.
我尝试使用 sshpass 无济于事。所以我的下一个解决方案是使用expect。我以前从未使用过expect，而且我确信我的语法已经过时了。
ssh -p$port root@$ip 'bash -s' < /path/to/script/test.sh
/usr/bin/expect <<EOD
expect "password"
send "$spass\n"
send "\n"
EOD
I have root access to all machines and ANY solution will do as long as the code remains within bash. Just keep in mind that this will be done in a loop with global variables ($spass, $ip, $port, etc) passed from a parent script.
我对所有机器都有 root 访问权限，只要代码保留在 bash 中，任何解决方案都可以。请记住，这将在具有从父脚本传递的全局变量（$spass、$ip、$port 等）的循环中完成。
回答by Jakuje
You are doing it wrong in two means:
你在两个方面做错了：
If you want
expectto interact withssh, you need to startsshfromexpectscript and not before.If you put the script (
/path/to/script/test.sh) tostdinofssh, you can't communicate with thesshprocess any more.
如果要
expect与 交互ssh，则需要ssh从expect脚本开始，而不是从之前开始。如果将脚本 (
/path/to/script/test.sh) 置于stdinofssh，则无法再与该ssh进程通信。
You should rather copy the script to remote host using scp and then run it.
您应该使用 scp 将脚本复制到远程主机，然后运行它。
Expect script might look like this:
Expect 脚本可能如下所示：
/usr/bin/expect <<EOF
spawn ssh -p$port root@$ip
expect "password"
send "$Spass\r"
expect "$ "
send "/path/to/script/on/remote/server/test.sh\r"
expect "$ "
interact
EOF
回答by Shebin Jacob
#!/usr/bin/expect
#Replace with remote username and remote ipaddress
spawn /usr/bin/ssh -o StrictHostKeyChecking=no username@IPAddress
#Replace with remote username and remote ipaddress
expect "username@IPAddress's password: "
#Provide remote system password
send "urpassword\n"
#add commands to be executed. Also possible to execute bash scripts
expect "$ " {send "pwd\n"} # bash command
expect "$ " {send "cd mytest\n"}
expect "$ " {send "./first.sh\n"} # bash scripts
expect "$ " {send "exit\n"}
interact
