How can I get to the following scenario:
At my house I install Ubuntu on a USB flash drive and install Steam and some games on it
At school I can boot of it and play the installed games and use the installed software
I tried to make a bootable USB device and got to the point where I had working Ubuntu in front of me (I chose "Try Ubuntu" when booting in). It was booted of the USB and nothing was installed on the computer as expected. I installed Steam and couple of games. After rebooting Steam and the games were gone. What went wrong?