How to Use XOR Gate in Bash Script
https://bashscript.net/how-to-use-xor-gate-in-bash-script/
How to Edit your Hosts File in Linux
https://lxer.com/module/newswire/ext_link.php?rid=350334
https://bashscript.net/how-to-use-xor-gate-in-bash-script/
https://lxer.com/module/newswire/ext_link.php?rid=350334