silwol@lasagne:~$ hubackup 
Traceback (most recent call last):
  File "/usr/bin/hubackup", line 16, in ?
    import HUBackup.backend.BackupEngine
  File "/usr/lib/python2.4/site-packages/HUBackup/backend/BackupEngine.py", line 20, in ?
    from pexpect import *
ImportError: No module named pexpect