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Editorial Team
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Asked: 2026-05-20T11:08:51+00:00

I use Ubuntu and am trying to write a script that makes the following:

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I use Ubuntu and am trying to write a script that makes the following:
-test if an audio stream works
-if not, send an email.

I have tried the following code (running as a cron job every 10 minutes), which ‘works’ if I supply the wrong pw e.g.(it sends an email then), but does nothing if the actual server is down (tested by killing the server). any ideas on how to fix the script?
Thanks in advance!

#!/bin/bash
#servertest.sh


username=user1
password=xyz


url="http://wwww.streamingaudioserver.com -passwd $password -user $username"

mplayer $url &
sleep 5

test=$(pgrep -c mplayer)

if [ $test = 0 ]; then
    #server is down!
    mailfile="downmail.txt"
    /usr/sbin/ssmtp test@maildomain.com < "/home/test/$mailfile"  
fi

killall mplayer
sleep 5

exit
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1 Answer

  1. Editorial Team

    Your problem is in this line:

    $mailfile="downmail.txt"

    remove the dollar sign and that should do it.

    You should be getting error messages in your cron log or emails to the crontab owner complaining about a command not found or no such file.

    Edit:

    Does your script work if run from the command line (with the stream down) rather than cron?

    Try using set -x (or #!/bin/bash -x) in the script to turn on tracing or use echo "PID: $$, value of \$test: $test" > /tmp/script.out after the assignment to see if you’re getting the zero you’re expecting.

    Also, try an ssmtp command outside the if to make sure it’s working (but I think you already said it is under some circumstances).

    Try your script without ever starting mplayer.

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