Show hidden files in OSX Finder utility

You can use a Terminal command to reveal the hidden files in OS X by making a change to the default behavior of Finder.

defaults write com.apple.Finder AppleShowAllFiles TRUE
killall Finder

reference:

http://computers.tutsplus.com/tutorials/quick-tip-revealing-hidden-files-in-os-x--mac-48663

Manually setting date time on Linux (Raspberry Pi, Beagle Bone, ...)

sudo date -s "17 Aug 2014 13:14:30"