How To Upgrade To Debian 12 Bookworm From Debian 11 Bullseye

Recenly I wanted to upgrade one of my virtual machines from Debian 11.1 (bullseye) to Debian 12 (bookworm). But how to do that when it is not Ubuntu, which I use quite often?

Well, I have found a very informative tutorial, step by step - with almost guaranteed success ratio ;-)

See more:
https://ostechnix.com/upgrade-to-debian-12-from-debian-11/

Secure Apache with Let's Encrypt on Ubuntu 22.04

TUTORIAL: How To Secure Apache with Let's Encrypt on Ubuntu 22.04

Perfect tutorial with perfect outcome! The crucial thing is indeed to have VirtualHost configured on HTTP port 80 in Apache first. With these instructions getting auto-renewable SSL certificate for a website is really easy. Big THANK YOU to the authors :)

• https://www.digitalocean.com/community/tutorials/how-to-secure-apache-with-let-s-encrypt-on-ubuntu-22-04

How to find files modified last month

Very interesting use of Linux date program, especially parameters to calculate start of last month. It's clever and it works!

find . -type f -name '*.php' -newermt "$(date -d "$(date +%y-%m-1) - 1 month" +%y-%m-%d)"

• https://unix.stackexchange.com/a/597331/556875