how to put gitignore file code example

Example 1: git add gitignore

$ touch .gitignore

Example 2: how to generate gitignore file

echo "
bin/**
lib/**
pyvenv.cfg
**.pyc
"  > .gitignore
cat .gitignore

Example 3: how to put files into gitignore

$ echo debug.log >> .gitignore
$ git rm --cached debug.log
rm 'debug.log'
$ git commit -m "Start ignoring debug.log"

Example 4: what is add.gitignore

The purpose of gitignore files is to ensure that certain files not tracked by git remain untracked.