bash script assign output to a variable fail

Question

OS:Yocto

I want to assign the shell output to a variable,

but get the error "test.sh: line 3: out: command not found".

How to do that ...?

this is my code:

#!/bin/bash

out = "$(ls /dev/ | grep "tty" | wc -l)"
echo"$out"

@Amandan is correct. In fact, Bash even allows you to do `out="something" some-command arg1 arg2`, which will execute `some-command arg1 arg2`, with `${out}` set to `something`. — jpaugh, Aug 24 '15 at 03:54

score 4 · Accepted Answer · answered Aug 24 '15 at 03:48

4

Whitespace matters.

#!/bin/bash

out="$(ls /dev/ | grep "tty" | wc -l)"
echo "$out"

answered Aug 24 '15 at 03:48

score 1 · Answer 2 · answered Aug 24 '15 at 05:28

1

when you assign value to variable don't keep Whitespace before and after "=" that makes error in bash

#!/bin/bash

out="$(ls /dev/ | grep "tty" | wc -l)"
echo"$out"

answered Aug 24 '15 at 05:28

DD Dev

score 0 · Answer 3 · answered Aug 24 '15 at 03:48

0

Try strip spaces around =, i.e. out="$(ls /dev/ | grep "tty" | wc -l)"

answered Aug 24 '15 at 03:48

Jokester

3 Answers3