bash 期望通过 ssh 提示脚本更改密码
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expect script change password prompted over ssh
提问by dwu
Currently I have a bash script that uses expect in it while doing some things over ssh. It looks like:
目前我有一个 bash 脚本，它在通过 ssh 做一些事情时使用了 expect 。看起来像：
#!/bin/bash
#some bash stuff here
...
/usr/bin/expect -c '
spawn somescript.sh
expect "password:"
send "$PASSWD"
'
...
somescript.sh does commands to a remote server over ssh, but now my login requires a change of password. I've tried
somescript.sh 通过 ssh 向远程服务器执行命令，但现在我的登录需要更改密码。我试过了
/usr/bin/expect -c '
spawn somescript.sh
expect "password:"
send "$PASSWD"
expect "current password"
send "$PASSWD"
expect "new password"
send "$NEWPASSWD"
'
but I get an error saying:
但我收到一条错误消息：
WARNING: Your password has expired.\n Password change required but
no TTY available.
回答by Aleks-Daniel Jakimenko-A.
So, somescript.shmakes an sshconnection and then you get an error about TTY not being available.
因此，somescript.sh建立ssh连接，然后您会收到有关 TTY 不可用的错误消息。
Try -toption!
尝试-t选项！
From ssh man page:
从ssh 手册页：
-t Force pseudo-tty allocation. This can be used to execute arbi-
trary screen-based programs on a remote machine, which can be
very useful, e.g., when implementing menu services. Multiple -t
options force tty allocation, even if ssh has no local tty.
回答by Brad Parks
This can be resolved by directly connecting to the box using ssh(ie not in a script).
这可以通过使用ssh（即不在脚本中）直接连接到框来解决。
Do that, and it'll prompt you to change your password. Do so, and the error will go away.
这样做，它会提示您更改密码。这样做，错误就会消失。
回答by syncerror
It looks like you are trying run ssh user@server passwdbut because your password expired you have to change it first. Probably when you run expect as spawn user@serverit will ask you for password change and it will works.
看起来您正在尝试运行，ssh user@server passwd但因为您的密码已过期，您必须先更改它。可能当您运行 expect 时，spawn user@server它会要求您更改密码并且它会起作用。
