You don't have rootsh installed, so none of those commands will work. You could try downloading the package manually (from here) and seeing whether it will install (open it in File Manager - it should launch App Manager and install it).

If that doesn't work then I think you'll need to reflash - if you don't have rootsh installed, and can't install anything, then I don't think there's any other way to fix things. Make sure you back up everything first though!