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ssh自动化出现的莫名报错

代码如:

ssh -q user@host <<EOF  ping -c 3 localhostEOF

会出现提示如:

Pseudo-terminal will not be allocated because stdin is not a terminal.

google了下,有人提出加上-T(ssh -T -q user@host)参数可避免此情况。如这篇文章介绍的:

http://buralin.iteye.com/blog/2035691

参数解释:

     -T      Disable pseudo-tty allocation.     -t      Force pseudo-tty allocation.  This can be used to execute arbitrary 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.

基于上述可以看出,当调用一个使用ssh自动化的脚本时,ssh登录到远程后会当前角色分配一个tty,但由于当前登录模式并非本地模式所以就会报错。

所以使用-T禁用该行为即可。

ssh自动化出现的莫名报错