dpkg was interrupted, you must manually run 'dpkg --configure -a'
I tried manually tried but it does not work

Can you give us more detail? Errors? Output?

sudo apt-get update
After this I got the result as
Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/lib/apt/lists/
How to solve this?

probably synaptic (or other package management tool) already started. You are not allowed to run them parallel.

What is the exact result of this command?
"Doesn't work" doesn't tell us anything.
Bullet 1

Thank you.

Before removing any files, make backups.

Don't forget to remove the lock files.

/var/lib/dpkg/lock

If problems persist, there may be others you need to remove. Try the above first, and only move on if it doesn't help.

/var/lib/apt/lists/lock
/var/cache/apt/archives/lock

Now run the following after deleting each of the above files:
After you have done this, you may want to retry running the process you were running at the time dpkg had been interrupted (upgrade, dist-upgrade, etc.) to make sure there aren't more packages that need to be installed.