I was following these steps to install ros indigo on a chroot environment on my Ubuntu 15.10 http://wiki.ros.org/ROS/Tutorials/InstallingIndigoInChroot
But I screwed some things up and I want to remove the chroot environment and restart the steps all over again on a clean slate. I googled it and found many posts saying I should just remove the /srv/chroot/indigo_trusty folder but when I tried some of the subdirectories couldn't be removed because they were 'busy'.
I tried to ignore it and use debootstrap to create another folder with the name 'indigo' as another chroot environment. But after it was done when I use schroot -l it only shows the old one 'indigo_trusty'.
What should I do to get rid of all chroot and start all over again?