How to create qrcodes in command-line

Install qrencode

sudo dnf install qrencode

Run the following command.

qrencode -o "test.png" "Hello World!"
# xdg-open test.png

qrencode -o "test2.png" "This is \
        a\
        multiline\
        qr-code\
      with a lot of text arsithraishtraihtsirts\
    rastarstnorastirahtensrahtierahts\
  arsnthierashtiersnhtearhtsierhsat\
ariesthresnth"
# xdg-open test2.png