Assigning CPU Core for your music application

To add those three commands to run at system startup, you can create a systemd service file and add those commands to its ExecStart line. Here are the steps:

1. Create a new systemd service file. You can use the command sudo nano /etc/systemd/system/<servicename>.service to create a new service file. Replace <servicename> with a name of your choice for the service file.

2. In the editor, add the following lines to the service file:

[Unit]
Description=Startup commands for RoonServer and set then to CPU CORE 0 and 1 only
After=multi-user.target
Wants=multi-user.target

[Service]
Type=simple
ExecStart=/bin/bash -c "sudo taskset -p -c 0,1 $(pgrep RoonServer); sudo taskset -p -c 0,1 $(pgrep RoonAppliance); sudo taskset -p -c 0,1 $(pgrep RAATServer); sudo taskset -p -c 2,3 $(pidof systemd)"

[Install]
WantedBy=multi-user.target

3. Save the changes to the service file and exit the editor.

4. Reload the systemd daemon to apply the changes to the service file. You can use the command sudo systemctl daemon-reload to do this.

5. Enable the service to start at system boot. You can use the command sudo systemctl enable <servicename>.service to enable the service. Replace <servicename> with the name of the service file you created.

6. Reboot the system to start using the new service. The three commands you added to the ExecStart line will be executed at system startup.

Note that the sudo command may require you to enter your password, so the service may not start automatically if it requires user input.