How do I send personalized notify-send about custom events?

Question

watch netstat -n -A inet             + notify-send "Attention new  connection"

or

watch  cat /proc/net/ip_conntrack    + notify-send "Attention new  connection"

or

watch ss -n                          + notify-send "Attention new  connection"

Do you have any idea how to connect this halves and thank you.

Answer 1

What you need is a short bash script, like:

#!/bin/sh
while [ 1 ]
do
  if [ "PARAMETER" = "SOMETHING" ]; then
     notify-send "Attention" "There is a new connection."
  else
     echo "Nothing Found"
  fi
  sleep 5
done

Basically, this would listen for a PARAMETER (How, I don't know...), and when it equals SOMETHING, then it will send a notification. If the PARAMETER is not equal to SOMETHING, it will print Nothing Found (This is not necessary, it just shows that it is working), wait for 5 seconds, and start again.

The problem is getting it find when it has connected... None of these...

• netstat -n -A inet
• cat /proc/net/ip_conntrack - apparently deprecated anyway, see here
• ss -n

...seem to produce the parameters required...

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_{Any corrections welcome, especially with the bash script}