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• Emacs, the text editor that comes pre-installed with macOS and that can be run from terminal, has a number of Easter eggs in the form of games. To display them, type Emacs then hit enter, then Fn.
• Ten fun and useful Terminal commands to use in macOS. Check server response. Ping is probably one of the more useful Terminal commands that an everyday Mac user might actually use. This command lets you check the response of a domain or IP address, such as “www.google.com” and see how quickly it takes for the server to respond.
• Did you know that you can play Tetris on your Mac? Of course you did, you can play lots of games. But did you know that there's already a Tetris game built in? In fact, if you know your way around Emacs, you can play a whole bunch of awesome retro games like pong and snake. Read on to see how.
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• Jul 11, 2016.
• Oct 05, 2012  Launch Terminal and get ready for some completely stupid tricks to keep yourself entertained. You’ll be listening to Horse Ebooks blab away, watching Star Wars in ASCII, playing retro games, toasting your CPU cores with a repetitive phrase, and even talking to a virtual psychotherapist.

Welcome back to Coding Corner! Today, we're going to go over some great interface and user tweaks you can execute to customize your Mac. These tricks are often simple and can help you spruce up your Mac far beyond what the System Preferences window allows.

So, without further ado, 15 great tricks you can execute in Terminal.

Tweak the Finder

Want to see hidden files, or copy Quick Look text? There are quite a few 'defaults' commands that let you alter how the Finder looks or acts.

1. Show hidden files and folders

Want to see all the hidden files and folders OS X has to offer — or you simply can't find a file you hid? Just use this command in Terminal:

defaults write com.apple.finder AppleShowAllFiles -bool TRUE
killall Finder

To re-hide all your files, just change the TRUE to FALSE.

2. View any file's contents

If you've had a file get corrupted or you suspect there's something hidden inside its package, you can force Terminal to open it. Just use the following command:

cat ~/enter/file/path

Fair warning: If you try to open a photo or pretty much any non-text document, you'll likely just see text gibberish.

3. Copy the contents of a folder from one place to another

Sure, you can Option-drag any file to a new location to make a copy of it, but if you want to simplify the process and automatically copy the entire contents of one folder to another, check out this simple Terminal trick.

ditto -V ~/original/folder/ ~/new/folder/

4. Download files outside of your browser

Have the URL to a file but don't want to use Safari, Firefox, or Chrome to download it? You can go through Terminal with the following commands:

cd ~/Downloads/
curl -O http://www.thefilename.com/thefile/url.mp3

The first command moves your current Terminal location to your Downloads folder; the second downloads it from the web to that folder.

Modifying screenshots

Want to change how your screenshots look? Here are some commands to help you do just that.

5. Change your screenshot's file format

This Terminal command lets you change the file format of your screenshots. By default, they're saved as PNGs, but you can also save them as PDFs, JPGs, and more.

defaults write com.apple.screencapture type jpg

6. Disable drop shadows on a screenshot

Here's another good one if you tend to take a lot of screenshots: This command will disable drop-shadow on your screenshots, only displaying the window you've snapped.

$ defaults write com.apple.screencapture disable-shadow -bool TRUE
killall SystemUIServer

7. Create a new default name scheme for screenshots

Don't like the phrase Apple uses to save your screenshots? Traditionally, it's 'Screen Shot - [date] - [time]', but you can change 'Screen Shot' to any word you please.

defaults write com.apple.screencapture name 'New Screen Shot Name'
killall SystemUIServer`

Get bored of your new name scheme? Go back to the default by typing as follows:

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defaults write com.apple.screencapture name '
killall SystemUIServer

8. Change the location of your screenshots

Your screenshots, by default, save to the Desktop. But if you'd prefer they save elsewhere, it's an easy Terminal trick to make it so.

defaults write com.apple.screencapture location ~/your/location/here
killall SystemUIServer

You can also drag the folder of your choice on top of the Terminal window after typing 'location' if you don't want to manually type out the file path.

System changes

If you're looking for broader OS X-level changes, these commands might help you get started.

9. Create a custom login message

Whether you want to troll your friends or add useful 'in case of loss' contact information, you can add a personalized message to your login screen with this Terminal command.

sudo defaults write /Library/Preferences/com.apple.loginwindow LoginwindowText 'In case of loss, call 555-555-5555.'

10. How long has my Mac been running?

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Is your Mac acting sluggishly? It might be in need of a good restart. You can check to see just how long your Mac's been active by checking its uptime with this Terminal command:

uptime

11. Keep your Mac awake

If you need to prevent your Mac from going to sleep — say, you're running an extensive task, or recording your screen — there's an all-too-amusing command for that:

caffeinate

Once you enter this command, your Mac's digital eyes will be pried open and prevented from going to sleep until you end it by pressing Control-C.

If you don't want to rely on being the one to end your poor Mac's suffering, you can also create a set a number of seconds before your Mac sleeps:

caffeinate -u -t 5400

The above command will keep your Mac awake for an hour and a half.

12. Make your Mac automatically restart after a crash

We've all had our Mac freeze up or crash at least once in its lifetime. If you want to skip the crying and the yelling at the screen and get back to work, you can enter this Terminal command, which will make OS X reboot as soon as it senses a full system freeze.

sudo systemsetup -setrestartfreeze on

Modify your Dock

Want to make your Dock look different? Check out these Terminal tweaks.

13. Add spacers to your Dock

You can organize your Dock's many icons by adding in blank spaces with this handy terminal command: Gaming on mac.

defaults write com.apple.dock persistent-apps -array-add '{'tile-type'='spacer-tile';}'
killall Dock

Repeat this command for each spacer you'd like for your Dock. To remove a spacer, you can drag it out to the right until you see the poof icon.

14. Dull hidden apps in the Dock

Not sure which apps are visible on your screen? You can make this information extra pertinent by using this Terminal command, which lowers the opacity on icons for hidden apps in the Dock. It's a great way to see what you haven't used lately, as well as what's cluttering up your screen.

defaults write com.apple.Dock showhidden -bool TRUE
killall Dock

15. Hide non-active apps in your Dock

If lowering the opacity of hidden apps appeals to you, you might like this Terminal command even better: It hides any closed app from your Dock at all times.

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defaults write com.apple.dock static-only -bool TRUE
killall Dock

Your favorites?

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Have a Terminal command you love that we didn't mention? Drop it below in the comments.

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Apple is now redirecting (PRODUCT)RED purchases to COVID‑19 relief fund

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Now through September 30, Apple is redirecting 100% of a portion of (PRODUCT)RED purchases to the Global Fund’s COVID‑19 Response.