System update
softwareupdate -i -a
Pipe output to clipboard
cat ~/Desktop/myfile.txt | pbcopy
Prevent Mac from sleeping
caffeinate -u -t 3600
Clear DNS cache
sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
Compare files in (GUI) FileMerge
opendiff ~/Desktop/text1.txt ~/Desktop/text2.txt
QuickLook from terminal
qlmanage -p ~/Desktop/text.txt
Source:
https://www.techrepublic.com/article/macos-terminal-commands-every-mac-user-should-know/