Readline support or ability to edit command and command history in interactive session

[k4ml]

Currently it's not possible for me to edit the command with scroll back, I have to delete the characters with backspace to get to the point I want to edit. For example, pressing the left arrow will give me:-

08:41:28 ~$ sup dev bash
/var/local/^[[D^[[D^[[D^[[D

Command history also not possible. Pressing Up arrow will give:-

ls /var/^[[A^[[A

Is this not supported by sup or it just my computer missing something?