October 1, 2025

Use curl -k --resolve bjorn.now:443:127.0.0.1 https://bjorn.now when testing an HTTPS site locally using Caddy, instead of curl -k -H "Host: bjorn.now" https://localhost, because Caddy relies on SNI and refuses the connection if it doesn’t know which host you’re trying to connect to.

Use usermod -l newuser -d /home/newuser -m olduser when renaming a user account, because it’ll update all relevant system files and move the home folder in one go.

Then groupmod -n newgroup oldgroup if you need to rename the group.