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show hidden file

Tho show hidden file (file with x):
Mojave:
In finder CMD + Shift + . to toggle it
Before Mojave:
Show
defaults write com.apple.finder AppleShowAllFiles YES; killall Finder /System/Library/CoreServices/Finder.app
Hide
defaults write com.apple.finder AppleShowAllFiles NO; killall Finder /System/Library/CoreServices/Finder.app