Connect to an Ubuntu server via SSH. Stores the connection under an alias for subsequent commands.

Disconnect from a server.

List all active SSH connections.

Run any shell command on a connected server (as the SSH user).

Run a command with sudo on a connected server. Requires the user to have sudo rights.

Get a comprehensive system overview: OS, CPU, RAM, disk, uptime, load.

List top processes by CPU or memory usage.

Show disk usage for a specific directory or all mounts.

Run apt update and show available upgrades.

Upgrade all packages (apt upgrade). Use apt_update first.

Install one or more packages.

Remove one or more packages.

Check the status of a systemd service.

Start, stop, restart, reload, enable, or disable a systemd service.

List all systemd services and their states.

View systemd journal logs for a service or the whole system.

Read the last N lines of any log file.

Read the contents of a remote file.

Write content to a remote file (overwrites). Use with caution.

List files in a remote directory.

Run a comprehensive security audit: open ports, users, SSH config, sudo rights, SUID files, failed logins.

List security-only updates available via apt.

Show UFW firewall status and rules.

Add or delete a UFW firewall rule.

Enable or disable the UFW firewall.

Apply SSH hardening best practices via a drop-in file: disable root login, disable password auth, set MaxAuthTries. IMPORTANT: ensure you have key-based auth working before running this.

List system users.

Create a new system user.

Delete a system user.

Add an SSH public key to a user's authorized_keys.

Show fail2ban jail status and banned IPs.

Unban an IP address from a fail2ban jail.

List cron jobs for a user or all users.

Show network interfaces, routing table, and active connections.

Ping a host from the remote server.