Tag: security

List every user and group on Linux with /etc/passwd, /etc/group, and getent, see who is logged in, and separate system accounts from normal users by UID.

Disaster recovery for your Linux home lab, tiered backups, a restic script that actually runs, restore drills, and the gotchas that bite at 2 AM.

Run a WireGuard VPN server in Docker with the linuxserver image, Compose setup, peer config generation, and road warrior access to your home network.

RSA SSH keys are aging out. Ed25519 is the modern default: generate one in seconds, secure it with ssh-agent, add FIDO2 hardware keys, and audit legacy keys safely.

Use su with a specific shell to switch users without the default login shell, useful when /etc/passwd points to something unexpected.

Generate SSH keys, set up passwordless auth, configure SSH, and transfer files securely with SCP, the foundation of headless Linux work.