dpkg: error: parsing file '/var/lib/dpkg/available' near line 0

Solution 1:

The problem is that your /var/lib/dpkg/available file is damaged.

This is not necessarily related to the git or git-core packages. Try to install any other package and they will fail too.

To fix this you have to delete/clear the file using the command:

sudo dpkg --clear-avail

then rebuild the file using the command:

sudo apt-get update

Now you should be able to install git and git-core.

Solution 2:

From the below error,it was clearly shown that your /var/lib/dpkg/available file was corrupted.

dpkg: error: parsing file '/var/lib/dpkg/available' near line 0:
newline in field name `../../../../../share/pyshared/UpdateManager/Core/__init__.py'

Solution for the above problem is to replace the current /var/lib/dpkg/available file with another /var/lib/dpkg/available-old backup file.

sudo rm /var/lib/dpkg/available
sudo cp /var/lib/dpkg/available-old /var/lib/dpkg/available

Now try,

sudo apt-get update
sudo apt-get install -f