How to hold Mac from going into sleep?

Every Mac owner knows how painful it is if their SSH session with a very important process just disconnects because of Mac going into sleep. Hopefully, there's a way to tell macOS that you don't want it to sleep - and here, you'll learn how to do it.

How to set maximum backup size in time machine

To set maximum backup size run this command in shell...

Flush dns in macOS

``` sudo killall -HUP mDNSResponder ```