Linux server tutorials
Step-by-step tutorials for a Linux server: VPNs, web servers, databases, containers, security and backups. Each one names the distributions it was tested on.
1 of 45 tutorials in Security tested on Debian 12 Oldstable
How to get a Let's Encrypt wildcard certificate with the DNS challenge
Get a free *.example.com certificate from Let's Encrypt with certbot or acme.sh and your DNS provider's API, renew it automatically and reload your web server.