bash sample code this project contains sample bash scripting:
site for bash command and scripting: http://www.gnu.org/software/bash/manual/bashref.html#What-is-Bash_003f
bash_code online check: https://www.shellcheck.net/
https://urbanautomaton.com/blog/2014/09/09/redirecting-bash-script-output-to-syslog/
https://sap1ens.com/blog/2017/07/01/bash-scripting-best-practices/