Screenshot shortcuts on a new Linux Mint OS

Linux Mint 17.3 did not have the keyboard shortcuts for screenshots of selected areas working.
I want the behavior to be:

• Shift-PrintScr = save selected area screenshot (to /home/<username>/Pictures/)
• Ctrl-Shift-PrintScr = copy selected area screenshot to clipboard

The following steps proved sufficient:

• Copy scripts from https://gist.github.com/dineshj1/d2c671a3ad82f89879c2
  
• Navigate to keyboard>shortcuts>custom shortcuts
• Add shortcut commands: 
• bash /home/dineshj/screenshot_area.sh, with keyboard bindings: Shift+Print 
• bash /home/dineshj/screenshot_area_to_clipboard.sh, with keyboard bindings: Ctrl+Shift+Print