Hello!

Today I'm gonna teach you how to install the Unity hub on repl.it!
First: Create a repl and open the shell (using CTRL + SHIFT + S for Windows, or COMMAND + SHIFT + S for Mac), and type in this:

wget https://public-cdn.cloud.unity3d.com/hub/prod/UnityHub.AppImage
# A file called UnityHub.AppImage will appear
chmod +x ./UnityHub.AppImage
# Now you can execute the file
./UnityHub.AppImage --appimage-extract
# A folder called squashfs-root will appear

Now, when you are ready to start Unity, run this:

./squashfs-root/unityhub --no-sandbox

Now, you can use the Unity hub in repl.it!