Category Archives: Arch Linux

Activate Synapse on Super (Win) key only

Arch Linux

It cannot be done directly from Synapse settings, but you can do it manually by editing Synapse configuration.

  1. Close Synapse
  2. Edit ~/.config/synapse/config.json
  3. Set activate to Super_L 
{
  "ui" : {
    "shortcuts" : {
      "activate" : "Super_L",
      ...
    }
  }
}

There is a disadvantage of this solution. You basically can’t use any other global key combinations with Win key, because it will always trigger Synapse.

If that is a problem you can use xcape to assign an additional one-click function to a modifier key.

xcape -e 'Super_L=Super_L|space'

Migrate subfolder to separate git repository

Arch Linux, Git

Let’s say you have a repository structure like below (eg. because previously it was SVN repository where everything was on one place).

  • .\Web
    • .\example.com
    • .\example.net
    • …

Now you would like to move example.com to separate git repository.

First of all, you need to install git-filter-repo.

# Clone old repository to new directory
git clone OLD_REPOSITORY example.com
cd example.com/

# Remove everything else except example.com directory
git filter-repo --path example.com/

# Make example.com new root directory
git filter-repo --subdirectory-filter example.com

# Push to a new repository
git remote add origin NEW_REPOSITORY
git push -u origin master

Installing Arch Linux ARM on Raspberry PI 3

Arch Linux

Insert SD card to your system.

sudo fdisk -l
sudo fdisk /dev/sdX

Create partitions.

  • Clear partitions (o)
  • Create boot partition (n, p, 1, enter, +500M, t, c)
  • Create system partition (n, p, 2, enter, enter)
  • Write partitions (w)
sudo mkfs.vfat /dev/sdX1
sudo mkfs.ext4 /dev/sdX2

Mount new partitions.

sudo mkdir /mnt/boot/
sudo mkdir /mnt/root/

sudo mount /dev/sdx1 /mnt/boot/
sudo mount /dev/sdx2 /mnt/root/

Download and install Arch Linux ARM.

wget http://os.archlinuxarm.org/os/ArchLinuxARM-rpi-aarch64-latest.tar.gz
sudo su
tar zxvf ArchLinuxARM-rpi-aarch64-latest.tar.gz -C /mnt/root
mv /mnt/root/boot/* /mnt/boot
sync
umount /mnt/boot/
umount /mnt/root/

Remove SD card, insert it into Raspberry PI and boot it to complete the installation.

pacman-key --init
pacman-key --populate archlinuxarm
pacman -Syu

Automatic external monitor switch on Arch Linux

Arch Linux

Install autorandr.

sudo pacman -S autorandr

Save current configuration. If you are on notebook you can eg. call it mobile.

autorandr --save mobile

Now connect you external monitor. Change the monitor settings as you wish and save it.

autorandr --save docked

From now on, when you connect external monitor it will automatically switch to it. If you disconnect it it will revert back internal monitor only.