How to Monitor Services With Bash Script in Ubuntu Linux

in this video we go over how to monitor services in Ubuntu Linux using bash scripting.
github link: https://raw.githubusercontent.com/zentech/learn-bash-script/main/service_monitor.sh

Ubuntu Server 20.04 Administration
https://www.udemy.com/course/ubuntu-server-administration-step-by-step/?referralCode=D9422D2C112795437238

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topics covered:
positional parameters
locate executable for a program (which)
command substitution
while loops
finding running process
if statements
mail command