This guide is only for connecting osu! to Kawata, not setting up the game itself. You can follow this guide to set the client up.
For this, you will need to modify your hosts file. To do so, run
nano /etc/hosts as root/with sudo.
When you’ve got it open, paste the following at the bottom:
220.127.116.11 osu.ppy.sh 18.104.22.168 c.ppy.sh 22.214.171.124 c1.ppy.sh 126.96.36.199 c2.ppy.sh 188.8.131.52 c3.ppy.sh 184.108.40.206 c4.ppy.sh 220.127.116.11 c5.ppy.sh 18.104.22.168 ce.ppy.sh 22.214.171.124 a.ppy.sh 126.96.36.199 i.ppy.sh
To save the file, press CTRL+X and then Enter.
Download the certificate by clicking here Open the Internet Explorer configuration by running “wine control.”
Double-click the “Internet Settings” icon, navigate to the “Content” tab, then click the “Certificates…” button.
Click on Import, then Next.
Click “Browse” and then select the Kawata certificate.
Select Place all certificates in the following store, and click Browse.
Select Trusted Root Certification Authorities, and click Ok.
Click “Next” and “Finish.”
You should get a message saying The import was successful.
After that is done, you can start the client up and log in with your Kawata credentials.