How to put value of echo pipe netcat commands into variable

Question

I have this command succession:

echo -ne "/dev/shm/test.sh" | netcat 89.196.167.2 4567

and let's say it return a string like, for example "Hello...bla". On the 89.196.167.2 system, I have made a server that takes ssh commands, executes them, and returns the result to the client. That ssh program is running OK; it returns what I need, so that is not the problem.

I want to put this returned value, "Hello...bla", into a variable and use it. If I try this:

var=echo -ne "/dev/shm/test.sh" | netcat 89.196.167.2 4567;echo "$var"

it doesn't work. Bash returns this:

-bash: -ne: command not found

Can you please help me with a solution?

score 3 · Accepted Answer · answered Mar 28 '13 at 09:20

3

Use backticks. i.e.:

var=`echo -ne "/dev/shm/test.sh" | netcat 89.196.167.2 4567`

answered Mar 28 '13 at 09:20

Didi Kohen

1,841

7

Don't use backticks. They don't nest and are not always easy to distinguish from single quotes. It's better to use $(...) instead: var=$(echo -ne "/dev/shm/test.sh" | netcat 89.196.167.2 4567) – Dennis Kaarsemaker Mar 28 '13 at 09:28
@DennisKaarsemaker Ok! I'll do that! Thank you! – Andreea Mar 28 '13 at 09:33
3

@DennisKaarsemaker, though backticks are obsolete and have all sort of issues, they do nest. – Stéphane Chazelas Mar 28 '13 at 10:12
1

@StephaneChazelas But they only nest in aspirin bottles. – Gilles 'SO- stop being evil' Mar 28 '13 at 23:29

How to put value of echo pipe netcat commands into variable

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