I have instaledl too many packages

[fg007]

hi,all
  I am a debian newbie.I have installed too may packages.
  I  want to use 'dselect' to delete some,but show many errors
  I want to use 'apt-get remove filename' but not know exactly the
  filename,and there are so many package to remove.
  How can I  reinstall but keep the smallest base system  so that I
  not need to reboot and can use apt-get,deselect,netconfig etc.
  
  
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Best regards,
 fg                            mailto:[EMAIL PROTECTED]