I am getting error while giving apt-get update. The error is "E: Encountered a section with no Package: header E: Problem with MergeList /var/lib/apt/lists/ E: The package lists or status file not be parsed or opened ".

Manfred Hampl suggests this article as an answer to your question:
FAQ #1591: “'E:Encountered a section with no Package: header, E:Problem with MergeList”.

If the instructions in the FAQ do not help, please follow the procedure steps 1 to 6 as listed in https://help.ubuntu.com/community/PackageManagerTroubleshootingProcedure with the only exception that in step 6 you should not create a new question document, but should continue in this current one.

I have removed the files in var/lib/apt/lists..
But still am getting the same error..

If you remove the files in /var/lib/apt/lists/partial/ and try reloading the repository information, are there new files in /var/lib/apt/lists/partial/ created?

If yes, please provide the contents of one of these files.

If there are no new files, please provide the full output of step 5 of https://help.ubuntu.com/community/PackageManagerTroubleshootingProcedure

I have followed the all the lines in step 5. But still getting the same error!!!

Doing the commands in step 5 of https://help.ubuntu.com/community/PackageManagerTroubleshootingProcedure will usually not solve your problem, but it will provide debug information that helps identifying the cause.

We need all output from the commands in that procedure to be able to help you!

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