How to ignore new changes to a tracked file with git? [duplicate]

Answer 1

If I understand well you want filename to be in the git repository. However you don't want to be notified of new changes to filename. You can do this using this command:

git update-index --assume-unchanged <filename>

If you wanna start tracking changes again run the following command:

git update-index --no-assume-unchanged <filename>

additional info: editing .gitignore will only ignore files so they will not be added to the git repository. However files that are tracked already will not be ignored.

Answer 2

Files are already tracked and now you want to ignore those files.

git rm --cached filename 
echo "filename" >> .gitignore
git add .gitignore
git commit -m 'Removes filename file and adds it to gitignore.'