Linux_post_install/DOC/POS.md

pos CLI Reference

pos is the unified command-line interface installed to /usr/local/bin/. Every tool is a small script in bin/ with a pos-<category>-<command> name. This document explains the dispatcher and every command.

• The dispatcher — bin/pos
• Logging behavior
• Commands
  • network
  • docker
  • media
  • system
  • ssh
  • vbox
  • flags
• Legacy wrappers

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The dispatcher — bin/pos

Purpose: turn pos <category> <command> [args] into a call to the matching pos-* script.

How it works

pos scans its own directory for executable pos-* files and tries variable-length argument matching, longest first. For pos docker compose up jellyfin:

tries pos-docker-compose-up-jellyfin   (not found)
tries pos-docker-compose-up            (not found)
tries pos-docker-compose               (found) → runs with args "up jellyfin"

pos help <command> runs <that command> --help. Running pos with no args prints the built-in usage text (which doubles as the category cheat-sheet).

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Logging behavior

Every non-interactive pos invocation logs to ~/.local/share/linux_post_install/logs/:

• Per-command files: YYYYMMDD_HHMMSS_pos_<args>.log (full stdout + stderr).
• pos.log: one line per invocation — command, log file, exit code.
• Interactive commands (pos system firewall, pos media mp4) only log the invocation, not their output.

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Commands

network

Command	File	Purpose	Configuration
pos network ip	bin/pos-network-ip	Show interfaces, default route, public IP	None. Public IP via https://ifconfig.me (5s timeout)
pos network checkport <ip:port>	bin/pos-network-checkport	Check if a TCP port is open	None. Uses /dev/tcp with a 2s timeout; exit 0/1 via OPEN/CLOSED
pos network scan <cidr> [--full] [--retries N]	bin/pos-network-scan	Two-phase nmap scan	See below
pos network hotspot [cmd]	bin/pos-network-hotspot	Wi-Fi hotspot via create_ap (CLI) or wihotspot-gui (GUI)	Uses the precompiled binaries from x64_bin/; see below

pos network scan in detail:

• Phase 1 — fast host discovery (nmap -sn -T5), prints the live host list.
• Phase 2 (only with --full) — service/version scan (-sV -sC), plus OS detection and NSE scripts if run with privileges; shows ports, OS, SSH host keys, HTTP titles, NetBIOS/SMB info.
• Accepts a bare IP (treated as /32) or a CIDR.
• Auto-raises to sudo nmap when possible (root, passwordless sudo, or an interactive terminal with --full).
• --retries N tunes discovery retries (default 1).

pos network hotspot in detail:

Backed by the precompiled binaries shipped in x64_bin/ (see SCRIPTS.md → x64_bin/). Needs root for the CLI commands (uses sudo):

Command	Behavior
pos network hotspot	Launches the wihotspot-gui (GTK3 GUI)
pos network hotspot start <wifi-iface> [<internet-iface>] <ssid> [<passphrase>]	Asks whether to run in the background; y starts create_ap --daemon (logs to /var/log/linux_post_install_hotspot.log), n runs in the foreground (blocks until Ctrl+C)
pos network hotspot start --foreground <wifi-iface> [<internet-iface>] <ssid> [<passphrase>]	Skips the prompt, runs in the foreground
pos network hotspot stop [<id>]	Stops the running access point via create_ap --stop; <id> is an interface name or PID, auto-detected if omitted
pos network hotspot status	Runs create_ap --list-running

docker

Command	File	Purpose	Configuration
pos docker ps	bin/pos-docker-ps	Enhanced container list: name, image, health, uptime, IPs, ports, ID, plus a healthy/unhealthy summary	None. Requires Docker + Python 3
pos docker health	bin/pos-docker-health	One-glance health dashboard; exits 1 if any container is unhealthy	None. Checks all containers including stopped ones
pos docker compose …	bin/pos-docker-compose	ScaleTail service manager	See Docker Compose / ScaleTail below

Docker Compose / ScaleTail

pos docker compose ls — list available ScaleTail service templates.

pos docker compose installed — list deployed services under $SERVICES_BASE.

pos docker compose up <service> — deploy a service:

1. If not yet deployed, creates $SERVICES_BASE/<service>/ with config/ and data/, copies the template's compose.yaml.
2. If no .env exists, copies the template's .env (or writes a default) and fills in your global config values (TS_AUTHKEY, TZ, DNS_SERVER).
3. If TS_AUTHKEY is still empty, prompts for it.
4. Offers to edit .env before starting (default yes on first deploy).
5. Runs docker compose up -d.

pos docker compose down/restart/logs <service> — stop, restart, or tail logs of a deployment.

pos docker compose update — git pull the ScaleTail templates, then refresh the compose.yaml of every deployed service. Per-service .env files are never touched.

pos docker compose config [show] — show the global config file and SERVICES_BASE.

pos docker compose config set KEY=VALUE — set/update a global default in ~/.config/linux_post_install/compose.env.

pos docker compose config edit — open the global config in $EDITOR (creates a default file first).

Configuration (three layers, most specific wins):

Layer	File	Notes
Template defaults	/usr/local/share/linux_post_install/scale-tail/services/<name>/.env	Read-only
Global config	~/.config/linux_post_install/compose.env	Edited via config set / config edit
Per-service	$SERVICES_BASE/<service>/.env	Created on first up, never overwritten

Global config keys:

Key	Required	Default	Purpose
TS_AUTHKEY	yes	—	Tailscale auth key for the sidecar
TZ	no	Europe/Amsterdam	Service timezone
DNS_SERVER	no	9.9.9.9	DNS server
SERVICES_BASE	no	/srv	Deployment root

media

Command	File	Purpose	Configuration
pos media mp3 <url>	bin/pos-media-mp3	Download audio as MP3 via yt-dlp, with thumbnail + metadata	Output to ~/Music/%(title)s.%(ext)s, --audio-quality 0
pos media mp4 <url>	bin/pos-media-mp4	Download video via yt-dlp with interactive format selection	Lists formats (yt-dlp -F), asks for a format ID, saves to ~/Videos/

system

Command	File	Purpose	Configuration
sudo pos system firewall	bin/pos-system-firewall	Interactive UFW ("UFW POWER") menu: add/delete rules, status, enable/disable/reset, default policies	Must run as root. Every command is previewed and confirmed before execution; supports --dry-run; keeps a history of executed commands

ssh

Command	File	Purpose	Configuration
pos ssh load-keys	bin/pos-ssh-load-keys	Load all ~/.ssh/id_* private keys into the ssh-agent	Uses SSH_AUTH_SOCK (default /run/ssh-agent/socket, provided by ssh-agent.service); skips .pub, known_hosts, authorized_keys, config; validates keys before adding

vbox

File: bin/pos-vbox Purpose: manage disposable Docker containers as lightweight "VMs". Each container gets a bind-mounted host directory so files persist after the container is removed. Containers carry the label linux_post_install.vbox=true.

Command	Behavior
pos vbox create <name> [image] [--dir <path>]	Creates a container from ubuntu:22.04 (or the given image), bind-mounting ~/<name> (or --dir, or . for cwd) as the working directory; prompts to enter immediately
pos vbox enter <name>	Shell into the container (auto-starts it if stopped); detects the working dir from the container mounts
pos vbox start/stop/rm <name>	Start, stop, or force-remove the container
pos vbox ls	List vbox containers only (label filter)

flags

Feature-flag management CLIs (see SCRIPTS.md → lib/flags.sh):

Command	Purpose
flag-reader	List all flags + status (set: <name> / unset: <name>)
flag-reader <name>	Check one flag; exit 0 if set, 1 if not
flag-reader --raw <name>	Print only the stored value (script-friendly)
flag-set <name> [value]	Set a flag, optionally with a value (requires sudo)
flag-clear <name>	Unset a flag (requires sudo)

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Legacy wrappers

Thin 2-line scripts that exec pos … "$@". All of them still work:

Wrapper	Forwards to
wr-ip	pos network ip
wr-checkport	pos network checkport
wr-scan-ping	pos network scan
wr-docker	pos docker
wr-compose	pos docker compose
wr-ufw	pos system firewall
mp3	pos media mp3
mp4	pos media mp4
vbox	pos vbox
ssh-load-all	pos ssh load-keys