Script to grab a screenshot, put it in a Dropbox directory and copy its public link into the clipboard. Modified from https://gist.github.com/Saicheg/4231551

screenshare

#!/bin/bash
# Usage:          screenshare [-m <window|area|desktop>] [-d <integer>] [-p]
#                   -m window     Grab active window
#                   -m area       Grab an area selected with the mouse
#                   -m desktop    Grab whole desktop
#                   -d <integer>  Grab after the specified delay in seconds
#                   -p            Include mouse pointer in the screenshot
# Description:    Take a screenshot, store it in Dropbox and copy public link
#                 into the clipboard
# Author:         Gabriel Rodríguez Alberich
# License:        MIT
# Requirements:   Dropbox, gnome-screenshot, xclip
# Notes:          Please ensure that ~/Dropbox/Public/screenshots/ exists
#                 You might want to reassign your desktop keybindings to call
#                 this script. For example:
#                   'Print'        -> screenshare
#                   '<Shift>Print' -> screenshare -m area
#                   '<Alt>Print'   -> screenshare -m window

usage() { echo "Usage: $0 [-m <window|area|desktop>] [-d <integer>] [-p]" 1>&2; exit 1; }

mode=  delay=  opts=

while getopts m:d:p opt; do
  case ${opt} in
  m)
      mode=${OPTARG}
      case ${mode} in
          window)
              opts="$opts --window"
              ;;
          area)
              opts="$opts --area"
              ;;
          desktop)
              ;;
          *)
              usage
              ;;
          esac
      ;;
  d)
      delay=${OPTARG}
      if [[ $delay =~ ^[0-9]+$ ]]; then
          opts="$opts --delay=$delay"
      else
          usage
      fi
      ;;
  p)
      opts="$opts --include-pointer"
      ;;
  *)
      usage
      ;;
  esac
done
shift $((OPTIND - 1))

TSTAMP=`date -u +"%Y-%m-%dT%H:%M:%SZ"`
IMAGEPATH=~/Dropbox/Public/screenshots/Screenshot-$TSTAMP.png
gnome-screenshot -f $IMAGEPATH $opts
dropbox puburl $IMAGEPATH | xclip -selection c
notify-send "Screenshare" "Screenshot saved to $IMAGEPATH"