1. Install Ubuntu Studio
2. Open Hydrogen. If it is not installed, open up the program by using Ctrl+Alt+T and enter the following command `sudo apt-get install hydrogen`.
3. To create a new pattern and add drum samples, right-click on "Default Pattern" and select "New Pattern".
4. To start adding drum samples, click the "Add Track" button on your transport panel.
5. To load different samples onto the drum pad, right click on the pad you wish to change the sample for and click "Load Sample"
6. You can edit the sample after it is placed on the pad by double clicking the pad and selecting "Edit"
Option 2 - LMMS
1. Install LMMS. If it is not installed, open up the program by using Ctrl+Alt+T and enter the following command `sudo apt-get install lmms`
2. Once installed, open LMMS.
3. To create a dubstep beat, you will need to use the Beat+Bassline Editor. You can open this by clicking on the "Instruments" menu and selecting "Beat+Bassline Editor".
4. Once the Beat+Bassline Editor is open, you can start creating your beat by clicking on the squares to add notes.
5. You can also change the sound of the beat by selecting different samples from the "Sample Selector" on the left side of the window.
6. To change the tempo of the beat, click on the "Tempo" knob in the top right corner of the window.
7. When you are finished creating your beat, you can save it by clicking on the "Save" button in the top left corner of the window.
Additional Tips
Make sure to quantize your notes so that they are evenly spaced. You can do this by selecting "Quantize Notes" from the "Edit" menu.
Don't be afraid to experiment with different sounds and patterns until you find something you like. If you do not like a sample, you can choose a new one on the "Sample Picker".
Use automation to control the volume, panning, and other effects of your sounds. You can do this by clicking on the "Automation" button on the transport panel.