UNIX for Advanced & Expert Users

only wc -l greater than 0 then send email to owner, otherwise do nothing.

ie.

result=powermt display dev=all|awk '{print $7}'|grep -i dead|wc -l

if [ $result -gt 0 ]
then
echo $result
else
:
fi
mailx -s "there is dead path (s)" "mymail@mydomain.com"

-----------

it is not working at all beacusse it send email no matter what condition . I just want wc -l greater than zeo only

It's a bit late here for me to dig to be sure of my answer, but my first guess is that $result is being treated as a string, not a number. If I'm right, and I'm too tired to be sure, then in this case, you can just treat it like a string with

Code:

if [$result -ne "0" ]

Advanced Bash-Scripting Guide

Two observations:
-use of backtick operator missing in assingning result variable
- misplaced mailx command outsife if

it should be like this :