Install dependencies:

sudo apt install git curl

If using Ubuntu/Debian, install the packages build-essential and libgconf2-dev as well.

Set up nixos:

curl https://nixos.org/nix/install | sh
. ~/.nix-profile/etc/profile.d/nix.sh
sudo mkdir -p /etc/nix
sudo nano /etc/nix/nix.conf

Add the following two lines for binary-caches from the official repository to /etc/nix/nix.conf:

binary-caches = https://cache.nixos.org https://hydra.iohk.io
binary-cache-public-keys = hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ=

Set up Cardano SL:

cd ~
git clone https://github.com/input-output-hk/cardano-sl.git
cd cardano-sl
git checkout master
nix-build -A connectScripts.mainnetWallet -o connect-to-mainnet

Set up Daedalus:

cd ~
git clone https://github.com/input-output-hk/daedalus
cd daedalus
nano package.json
# Delete the line starting with "electron-inspector"!
npm install

If you are getting the AssertionError for a wrong node version, edit the file node_modules/fbjs-scripts/node/check-dev-engines.js and comment out line 39 to 42 and line 57 to 60, which both start with assert( semver.satisties(npmVersion.
Then run npm install again.

npm run build
NODE_TLS_REJECT_UNAUTHORIZED=0 npm run start

Deadalus should now be running in the terminal. To start Cardano SL, open up a new one.

cd ~/cardano-sl
./connect-to-mainnet

Now you can use the Daedalus application.

When getting a Daedalus Sync Error while setting up reload the view by pressing Ctrl+R.