Can please someone explain, why this is not working??
#!/bin/bash
cmd="ps aux | grep -v grep"
cnt=$($cmd)
I get an error from ps.
error: garbage option
Usage:
ps [options]
.....
"ps aux" only will be ok - but not with any additional piped commands.
Thanks!
It is better and safer to use function to store a pipeline command as:
unset cmd cnt
cmd() {
ps aux | grep -v grep
}
and use it in command substitution as:
cnt="$(cmd)"
Please use this command:-
cmd= ps aux | grep -v grep
when we want to use o/p from other command we need to use actute (`) instead of double quotes (")
Thanks
cmd, just the command itself. There's the command substitution actually running it on the following line.