i can't uninstall ubuntu software

Posted by cunix on Ask Ubuntu See other posts from Ask Ubuntu or by cunix
Published on 2012-11-13T06:21:37Z Indexed on 2012/12/02 5:22 UTC
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root@cunix:/home/cunix# sudo apt-get remove fern-wifi-cracker
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libqt4-test libqt4-sql-mysql mysql-common libqt4-xmlpatterns libqt4-help
  python-qt4 python-sip libqt4-sql-sqlite libqt4-sql macchanger
  libqt4-designer libmysqlclient16 python-scapy libqt4-scripttools
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
  fern-wifi-cracker
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 3,514kB disk space will be freed.
Do you want to continue [Y/n]? y
(Reading database ... 167661 files and directories currently installed.)
Removing fern-wifi-cracker ...
dpkg (subprocess): unable to execute installed pre-removal script (/var/lib/dpkg/info/fern-wifi-cracker.prerm): Exec format error
dpkg: error processing fern-wifi-cracker (--remove):
 subprocess installed pre-removal script returned error exit status 2
Errors were encountered while processing:
 fern-wifi-cracker
E: Sub-process /usr/bin/dpkg returned an error code (1)

how to uninstall?

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