About: https://banochkin.com/blog/rkn-check/

Clone this repository:

git clone https://github.com/Banochkin/rkn-checker

Edit settings.conf by putting your Telegram bot token on the first line and your (or your desired) user id on the second.

./rkn-checker.sh

The sites.txt file in the script directory is checked by default. You can specify a third-party txt file, for example:

./rkn-checker.sh file.txt