计算机在一个窗口中给了我这个输出：
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_natty_main_binary-i386_Packages
E: The package lists or status file could not be parsed or opened.
我怎样才能解决这个问题？
当我尝试安装任何软件时，都会遇到此错误，因此无法更新。
Preconfiguring packages ...
dpkg: error: parsing file '/var/lib/dpkg/status' near line 51245 package 'oracle-xe':
mixed non-coinstallable and coinstallable package instances present
N: Ignoring file 'gcl' in directory '/etc/apt/sources.list.d/' as it has no filename extension
N: Ignoring file 'gcl' in directory '/etc/apt/sources.list.d/' as it has no filename extension
E: Sub-process /usr/bin/dpkg returned an error code (2)