- Vrealmatic
- Ubuntu Server
Installing, securing and running Ubuntu Server
Practical guides from our own server operations – secure SSH access, firewall, automatic updates, VPN and time synchronization.
- SSH keysKey-based login and disabling password authentication.
- Two-factor authentication (2FA)Google Authenticator for SSH and sudo.
- Fail2BanBlocking brute-force login attempts.
- Unattended upgradesAutomatic security updates.
- Time synchronizationsystemd-timesyncd vs. Chrony with NTS.
- Mullvad VPNVPN client with split tunneling for NTP.
- Proton VPNWireGuard connection to Proton VPN.
- Node.jsInstallation via NVM, NodeSource or Apt.
- GitGitHub access over SSH.
- WSL2 Ubuntu on WindowsIsolated Linux environment for AI coding agents.
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