I’ll introduce the qrencode command for generating QR codes.

Background: Want to Generate QR Codes Safely

While there are several web services that can create QR codes for free, I had some resistance to entering various information on such sites.

So I decided to set up an environment where I could generate QR codes from the CLI to create QR codes safely.

Installing qrencode

Installing qrencode [CentOS Edition]

yum install -y qrencode

Installing qrencode [macOS Edition]

brew install qrencode

? qrencode — Homebrew Formulae

Installing qrencode [Ubuntu Edition]

apt install -y qrencode

How to Use qrencode

Output QR Code to CLI

qrencode -t ansi "https://example.com/"

Output QR Code to PNG Image File

qrencode -o qrcode.png "https://example.com/"

Output QR Code from .txt File Contents to PNG Image File

qrencode -r input.txt -o qrcode.png

That’s all from the Gemba, where I want to safely generate QR codes with the qrencode command.

Reference Information

• libqrencode