Personal Arch Wiki

This is a collection of useful references, snippets, and information that I found useful when tinkering with Arch Linux.

Network

Wi-Fi Connection

Using iwd

1. Make sure that iwd is running:

   > sudo systemctl status iwd
   

   If not, start the service by running:

   > sudo systemctl enable iwd
   > sudo systemctl start iwd
   

2. Start the interactive prompt:

   > sudo iwctl
   

3. Find the name of the wireless device by listing all devices:

   [iwd]# device list
   

   If the device is turned off, turn it on:

   [iwd]# device [DEVICE_NAME] set-property Powered on
   

4. Initiate a scan for networks:

   [iwd]# station [DEVICE_NAME] scan
   

   then list all available networks:

   [iwd]# station [DEVICE_NAME] get-networks
   

5. Connect to the desired network:

   [iwd]# station [DEVICE_NAME] connect [SSID]
   

   Enter the passphrase (if prompted) to the network.

Using nmcli

1. Install networkmanager package if NetworkManager is not installed.

   > sudo pacman -S networkmanager
   

2. Start / enable NetworkManager.service.

   > sudo systemctl start NetworkManager.service
   > sudo systemctl enable NetworkManager.service
   

3. List nearby Wi-Fi networks:

   > nmcli device wifi list
   

   Connect to a Wi-Fi network:

   > nmcli device wifi connect [SSID] password [PASSWORD]
   

   Disconnect an interface:

   > nmcli device disconnect ifname [INTERFACE]
   

   Get a list of connections with their names, UUIDs, types and backing devices:

   > nmcli connection show
   

   Turn of Wi-Fi:

   > nmcli radio wifi off
   

Battery

Check Battery Status

1. Install tlp.

   > sudo pacman -S tlp
   

2. Run the following command.

   > sudo tlp-stat -b
   

Input Devices

Keyboard Input Remapping

Dual Function Keys

1. Run the following command and find out the name of the keyboard.

   > libinput list-devices | grep "^Device"
   

2. Create a new configuration: /etc/interception/udevmon.d/[KEYBOARD_NAME].yaml.

   - JOB: "intercept -g $DEVNODE | dual-function-keys -c </path/to/dual-function-keys.yaml> | uinput -d $DEVNODE"
     DEVICE:
       NAME: <keyboard name>

   When using a wireless keyboard however, setting the name sometimes does not work. In this case, set the name to .*, which processes every input.
3. Create a yaml file (conventionally resides in /etc/interception/dual-function-keys) that contains the configuration for Dual Function Keys itself. I use the following configuration:

   TIMING:
     TAP_MILLISEC: 1000
     DOUBLE_TAP_MILLISEC: 0
     SYNTHETIC_KEYS_PAUSE_MILLISEC: 0
   MAPPINGS:
     # Esc and LCtrl with CapsLock
     - KEY: KEY_CAPSLOCK
       TAP: KEY_ESC
       HOLD: KEY_LEFTCTRL

   However, pressing the key will still send the original key on press, and this may interfere with programs such as (neo)vim. To prevent this, add HOLD_START: BEFORE_CONSUME_OR_RELEASE.

Using evremap

1. Install evremap from AUR:

   > paru -S evremap-git
   

2. Enable / start the system service:

   > sudo systemctl enable evremap.service
   > sudo systemctl start evremap.service
   

3. Edit the service file to point to your config. First check the path of the service:

   > systemctl status evremap.service
   

   Then edit the file to point to your config:

   # /usr/lib/systemd/system/evremap.service
   ...
   ExecStart=bash -c "/usr/bin/evremap remap /etc/evremap.toml -d 0"
   ...

4. Configure remapping to your taste:

   # The name of the device to remap.
   # Run `sudo evremap list-devices` to see the devices available
   # on your system.
   device_name = "[DEVICE_NAME]"
    
   # If you have multiple devices with the same name, you can optionally
   # specify the `phys` value that is printed by the `list-devices` subcommand
   # phys = "usb-0000:07:00.3-2.1.1/input0"
    
   # Configure CAPSLOCK as a Dual Role key.
   [[dual_role]]
   input = "KEY_CAPSLOCK"
   hold = ["KEY_LEFTCTRL"]
   tap = ["KEY_ESC"]
    
   [[remap]]
   input = ["KEY_LEFTMETA"]
   output = ["KEY_LEFTALT"]
    
   [[remap]]
   input = ["KEY_LEFTALT"]
   output = ["KEY_LEFTMETA"]
    
   [[remap]]
   input = ["KEY_RIGHTMETA", "KEY_K"]
   output = ["KEY_UP"]
    
   [[remap]]
   input = ["KEY_RIGHTMETA", "KEY_L"]
   output = ["KEY_RIGHT"]

Korean (Hangul) Input

This only works for hyprland. Source

1. Install kime from AUR.

   > paru -S kime-bin
   

2. Add these in ~/.config/hypr/hyprland.conf:

   # Execute kime
   exec-once = kime
   
   # Set envvars for kime
   env = XDG_CURRENT_DESKTOP,Hyprland
   env =GTK_IM_MODULE,kime
   env = QT_IM_MODULE,kime
   env = XMODIFIERS,@im=kime
   
   # Set ralt, rctrl to hangul and hanja
   input {
       ...
       kb_options = korean:ralt_hangul,korean:rctrl_hanja
   }
   

Miscellaneous

Run Fetch Script on Terminal Launch

> function fish_greeting
    neofetch
end
> funcsave fish_greeting

Source

OBS Virtual Camera

1. Install the v4l2loopback-dkms package.

   > sudo pacman -S v4l2loopback-dkms
   

2. Load the kernel module.

   > sudo modprobe v4l2loopback
   

3. To reload the module, first unload the module.

   > sudo modprobe -r v4l2loopback
   

4. For Chromium / WebRTC based applications, set option exclusive_caps=1.

   > sudo modprobe v4l2loopback exclusive_caps=1
   

GPG waiting for lock ... Error

1. Locate all files with .lock or .lck extension inside ~/.gnupg.

   > ls -l ~/.gnupg/*/*.l{o,}ck
   

2. Remove any lock files found.

Changing the default browser

1. To get the current default web browser:

   xdg-settings get default-web-browser
   

2. To set the default web browser:

   xdg-settings set default-web-browser [BROWSER]
   

Keyboard Backlight / Brightness

1. Install brightnessctl:

   > sudo pacman -S brightnessctl
   

Keyboard Backlight

2. Get the maximum brightness level (obtain the vendor name using ls in the directory):

   > cat /sys/class/leds/[VENDOR]::kbd_backlight/max_brightness
   

   Or alternatively:

   > brightnessctl --device='[VENDOR]::kbd_backlight' info
   

   Then set the brightness using brightnessctl:

   > brightnessctl --device='[VENDOR]::kbd_backlight' set [BRIGHTNESS]
   

   Make sure to set the brightness level below the max level.

Brightness

2. Same process as keyboard backlight, but use the path

   > cat /sys/class/backlight/[VENDOR]/max_brightness
   

   instead.

Access System Clipboard in (Neo)Vim

I use hyprland, so this only works for Wayland.

1. Install wl-clipboard:

   > sudo pacman -S wl-clipboard
   

2. Add the following line to init.vim:

   set clipboard+=unnamedplus
   

   Or to init.lua for neovim:

   vim.opt.clipboard:append("unnamedplus")

Change Acceleration Profile for ThinkPad Trackpoints

Change libinput acceleration profile for ThinkPad’s trackpoint from adaptive to flat. This only works for hyprland. Source

# Add to hyprland.conf
device {
    name = tpps/2-ibm-trackpoint
    accel_profile = flat
}

Extract data.tar.gz(or .xz) from .deb

Use ar from binutils. binutils is in the base-devel group, so it should be already installed. Source

> ar x <deb-file> data.tar.gz