feat: add Arch Linux Bluetooth connectivity guide

Author: UmmItKin

src/content/blog/Linux/distribution/Archlinux/bluetooth-connect/index.md

@@ -0,0 +1,58 @@
+---
+title: "Arch Linux Bluetooth Connectivity Guide"
+description: "Quick-reference cheatsheet for installing, configuring, and troubleshooting Bluetooth on Arch Linux."
+date: 2026-06-01T16:00:00+0800
+tag: "Arch Linux, Bluetooth, Linux"
+lang: en-US
+---
+
+## Installation
+
+```bash
+sudo pacman -S bluez bluez-utils
+```
+
+## Systemd Service Management
+
+```bash
+sudo systemctl start bluetooth.service
+sudo systemctl enable bluetooth.service
+sudo systemctl stop bluetooth.service
+sudo systemctl restart bluetooth.service
+sudo systemctl status bluetooth.service
+```
+
+## Bluetoothctl CLI Commands
+
+Type `bluetoothctl` in your terminal to enter the interactive shell, then use these commands:
+
+| Command | Description |
+|---|---|
+| `power on` / `off` | Turn the Bluetooth radio on or off |
+| `scan on` / `off` | Start or stop searching for nearby devices |
+| `devices` | List all discovered and known devices |
+| `paired-devices` | List all successfully paired devices |
+| `pair <MAC>` | Pair with a specific device |
+| `trust <MAC>` | Trust the device (allows automatic reconnects) |
+| `connect <MAC>` | Establish a connection to the device |
+| `disconnect <MAC>` | Disconnect from the device |
+| `remove <MAC>` | Unpair and delete the device from system memory |
+| `exit` | Quit the bluetoothctl shell |
+
+## Real Example: Connect a Bluetooth Headset
+
+Walk through pairing and connecting a headset from scratch:
+
+```bash
+sudo systemctl start bluetooth.service
+
+bluetoothctl
+
+power on
+scan on
+scan off
+pair AA:BB:CC:DD:EE:FF
+trust AA:BB:CC:DD:EE:FF
+connect AA:BB:CC:DD:EE:FF
+exit
+```