Install/Setup Bash Script for Raspbian Jessie Lite (Only Linux)

Hey there,

Cause its quite annoying to install Raspbian Jessie Lite manually on your SD card, I made a script which installs Raspbian Jessie Lite on your SD card.

Copy the code here: https://pastebin.com/5yCfgE0B

Create a new file named install-lite.sh or something like this and paste the copied code in it.
Save it and make it executable with chmod +x <the files name here>

• Execute the script with sudo ./<your files name here> (If you forgot the sudo you won't be able to execute the script)
• Type in your user password to continue (because of the sudo)
• The available devices will be listed (!!! Beware, that /dev/sda is mostly your hard drive)
• Choose you SD-Card from the list above and type in the name of the disk (without the ending of any partition!)
  (e.g.: /dev/mmcblk0 - NOT /dev/mmcblk0p1) and press RETURN
• Type in y and press RETURN to contine. Otherwise you'll exit the script
• Choose a volume label for the SD-Card and press RETURN (If you type in nothing, the name of you SD-Card will be "RJLite" which stands for Raspbian Jessie Lite)
  Remember: This is not the hostname of your Raspberry Pi
• If you will asked if you wanna proceed creating an ext4 partition on SD-Card type in y and press RETURN, otherwise the script won't go further and exit
• Now you can choose between:

1. An existing Image:
   1. Type y and RETURN
   2. All images including raspbian-jessie-lite in their name will be listed to help finding the image
   3. Type in the path to the image (Autocomplete is enabled!) and RETURN
   4. The image is going to be written on the SD-Card now
2. Downloading the latest image
   1. The image will be downloaded, unzipped and written to the SD-Card

• This could take a while!
• All partitions from SD-Card will be shown in terminal
• Type in the path to boot partition (mostly the first partition like /dev/mmcblk0p1) and RETURN
• Type in the path to root partition (mostly the second partition like /dev/mmcblk0p2) and RETURN
• The partitions will be mounted in /media/<USERNAME>/boot and root.
• The ssh file will be created in boot automatically
• Now you have to setup WIFI
• Choose a hostname and press RETURN (If you type in nothing, the name will be "raspberrypi")
• Type in the Name/SSID of your WIFI and press RETURN
• Type in the passphrase/PSK of you WIFI and press RETURN
• If you want to generate ssh-keys for your Raspberry Pi type in y and press RETURN
• Press RETURN 3 times
• If you want to disable PasswordAuthentication press type in y and press RETURN
• Now remove the SD-Card from your device (the card is unmounted automatically)
• Put the Card in your Raspberry Pi SD port and turn the Raspberry Pi on
• After a while you should be able to connect to without typing in a password
• If it's the first time you will be asked for it if the raspberrypi is a trustable device
• ssh pi@<hostname> or ssh pi@<IP Adress of Raspberry Pi here>

If there are any problems with the script please tell me in the comments or write me a message or an E-Mail

Because I'm using Linux I used the bash for coding the script.
I think It'll be a good alternative to install and setup it manual.
So it would be cool if some people could code this for OS-X and Windows, so that this lite tool is available for the most people.

If you need any explanation send me a message or comment below.