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rated 0 times [ 13] [ 0] / answers: 1 / hits: 2119 / 3 Years ago, sat, june 26, 2021, 2:43:17

I need to run repeatedly (every 3600 seconds) the following commands from the terminal:

if whois abcxyz.com | grep -q 'string'; then

    echo 'Message line 1'

    echo 'Message line 2'

fi

I tried using watch, as follows:

watch -n 3600 if whois abcxyz.com | grep -q 'string'; then

    echo 'Message line 1'

    echo 'Message line 2'

fi

but I get error messages.

Could you please help me make it work?

Thanks

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Total Points: 259

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Total Answers: 121

Location: New Caledonia

Member since Wed, Sep 15, 2021

3 Years ago

answered 3 Years ago trousransla · Accepted Answer

Since watch [options] command executes command using sh -c by default, you can use it run snippets of shell code directly provided that:

and

So for example

$ watch -n 36 'if whois abcxyz.com | grep -q "string"; then

  echo "Message line 1" | ts

  echo "Message line 2" | ts

fi'