在paramiko管道命令 [英] Piped commands in paramiko

问题描述

我如何在paramiko中运行管道命令？我这样做： - $ / b>
$ b

  statement ='grep thing file | grep thing2 | tail -1'
 last_msg = conn.execute（statement）
  

grep thing file only。

解决方案

因为 grep 不知道如何处理 | 。准备好一些讨厌的转义：

  statement =sh -c'grep thing file | grep thing2 | tail -1 ''
  

这会在另一面创建一个shell，并要求它解释字符串 grep thing文件| grep thing2 |尾-1 。单引号是必须的，因为 sh -c 只接受一个参数。

这样，shell将创建为你的管道，运行所有的命令。最好确保文件名 file 不包含空格。如果是，请尝试file。

How do i run piped commands in paramiko? i'm doing this :-

statement = 'grep thing file | grep thing2 | tail -1'
last_msg = conn.execute(statement)

i get the output of grep thing file only.

解决方案

Because grep doesn't know how to handle |. Get ready for some nasty escaping:

statement = """sh -c 'grep thing file | grep thing2 | tail -1'"""

This creates a shell on the other side, and asks it to interpret the string grep thing file | grep thing2 | tail -1. The single quotes are necessary since sh -c accepts only a single argument.

That way, a shell will create the pipe for you, running all the commands. And you better be sure that the filename file doesn't contain spaces. If it does, try "file".

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