Worth installing everywhere. On OSX, simply:

$ brew install fzf

# To install useful key bindings and fuzzy completion:
$(brew --prefix)/opt/fzf/install

Secondary Screen Lagging on Mac

What worked for me was updating the “Refresh Rate” from 30HZ to 60HZ:

Useful Commands for Cleaning up Storage

To sort folders by their size, recursively:

$ du -h | sort -h

Then, to delete any folder of the name to_delete:

$ rm -rf `find . -type d -name to_delete`

In terminal:

$ lsof -t -i tcp:80 | xargs kill

If your Wacom tablet stopped working after you installed Parallels.

If some hotkey doesn’t work for you, it’s likely that it got blocked by some other app in the background.

Setting up React Native Environment following create-react-native-app.

That was a very vague error message when installing certain gems. What we need to do is:

For error:

Error: listen EADDRINUSE :::3042

We just need to kill whatever that’s on the port. Probably the last exit wasn’t clean. Do:

$ lsof -i :3042 // to find out the PID number
$ kill -9 PID   // kill the process with its PID

Just reclaim ownership of the untamed parent directory, instead of sudo-ing every single time.