Backticks for a subshell are 'depricated' though the convention is still in wide use. I use the $() method because `su - user 'command --opt="foo"'` and such can get a bit confusing, and the alternative is much easier to pick out of a mass of text.
On Oct 17, 2011 1:45 PM, "Mike Wright" <mike.wright@xxxxxxxxxxxxxx> wrote:
On 10/17/2011 12:39 PM, Mike Wright wrote:
> Hi all,
>
> I'm trying to write a bash script and having problems.
>
> If I execute this:
>
> ps x | grep mongod | wc -l
>
> it returns a value.
>
> OTOH, if I execute this:
>
> LINES = ps x | grep mongod | wc -l
>
> it returns "command not found".
>
> How does one assign the output of a command to an environment variable?
Aaargh! Doesn't like the spaces around the = sign.
LINES=`ps x | grep mongod | wc -l` is a way to write it.
Sorry for the noise :/
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