Change default Screenshot Save Location MacOS X

I take a lot of screenshots for different reasons. I keep some, post others on social media or I use them to illustrate my posts. The default save lcation is current users desktop, and you might find the desktop to be cluttered with the screenshot files rather quickly.

Keyboard Shortcuts to Capture a Screen Shot with Mac OS X

Save to location
⌘ Cmd + Shift + 3 - Entire screen
⌘ Cmd + Shift + 4 - Portion of the screen
⌘ Cmd + Shift + 4 then Space - Specific application window

Copy to clipbard
⌘ Cmd + Ctrl + Shift + 3 - whole screen capture
⌘ Cmd + Ctrl + Shift + 4 - selective capture
⌘ Cmd + Ctrl + Shift + 4 Space - window screen capture

How to change default Screenshot Save Location

Press ⌘ Cmd + Space to open Spotlight and type terminal or, as I prefer, iTerm 2

$ mkdir $HOME/Documents/Screenshots
$ defaults write com.apple.screencapture location $HOME/Documents/Screenshots/
$ killall SystemUIServer

You also might want to move all your existing screenshots from the desktop to your new folder.

$ mv $HOME/Desktop/Screen\ Shot\ *.png $HOME/Documents/Screenshots/.

Change the default screenshot file name

The default screenshot name is "Screen Shot 2017-01-18 at 10.56.49.png"
[Name] [date] at [time].[type] You can only change the [Name] and [type]

$ defaults write com.apple.screencapture name "Prefix Name"

Change the screenshot image type

By default, OS X saves screenshots as .png (or Portable Network Graphics) files. Valid formats: .bmp, .pdf, .jpg, .jp2, .tif, .pict, .tga and .png

$ defaults write com.apple.screencapture type jpg

Mac OSX keeps prompting for SSH key passphrase

So, since I upgraded my MAC to OSX 10.12.2 I always get promted for my SSH key passphrase witch is rather annoying.

$ ssh example.com
Enter passphrase for key '/Users/<username>/.ssh/id_rsa':

This passphrase was stored in Keychain and was unlocked when I unlock my MAC
By adding UseKeychain yes to your ~/.ssh/config it solves this problem.

$ cat ~/.ssh/config
Host *
  UseKeychain yes

In courtesy of  @aral on Twitter.
You can also read more about Keychain changes in Technical Note TN2449

Keychain changes
Prior to macOS Sierra, ssh would present a dialog asking for your passphrase and would offer the option to store it into the keychain. This UI was deprecated some time ago and has been removed.
Instead, a new UseKeychain option was introduced in macOS Sierra allowing users to specify whether they would like for the passphrase to be stored in the keychain. This option was enabled by default on macOS Sierra, which caused all passphrases to be stored in the keychain

--Cheers