In this article you learn that how ignore any file in git and how to ignore complete folder using git.

Ignore files that already committed in got repo.

To ignore files that have already been committed to a Git repository, you need to first remove the files from Git's version tracking, and then add them to the repository's ".gitignore" file. Here's how:

• Remove the files from version tracking: "git rm --cached <file>"
• Open the ".gitignore" file in a text editor: "nano .gitignore"
• Add a line to the ".gitignore" file specifying the file(s) you want to ignore: "<file>"
• Commit the changes to the ".gitignore" file: "git add .gitignore && git commit -m 'ignore <file>'"

From this point on, Git will ignore the specified file(s) and will not track changes to them. If the file(s) already exist in the repository, they will not be deleted, but Git will stop tracking changes to them.

Ignore complete folder except one file with example

To ignore all files in a directory except for one file in Git, you can use a negated pattern in the ".gitignore" file. Here's an example:

1. Open the ".gitignore" file in a text editor: "nano .gitignore"
2. Add the following line to the ".gitignore" file, replacing "directory" with the name of the directory you want to ignore: "directory/*"
3. Add an exception for the file you want to keep track of by adding the following line below the previous line: "!directory/<file>"
4. Save and close the ".gitignore" file.

From this point on, Git will ignore all files in the specified directory except for the specified file. The changes to the specified file will be tracked and committed to the repository.

Git ignore all possible examples 

Git uses a ".gitignore" file to specify files and directories that Git should ignore. Here are some examples of ignore patterns:

• Ignore all files with a specific extension: ".<extension>" Example: ".log"
• Ignore all files in a specific directory: "/<directory>/" Example: "/temp/"
• Ignore all files in a specific directory and its subdirectories: "/<directory>/" Example: "/bin/"
• Ignore all files with a specific name, regardless of the directory: "<file>" Example: "/.DS_Store"
• Ignore all files except for one specific file in a directory:

/<directory>/*
!/<directory>/<file>

/temp/*
!/temp/important.txt

• Ignore all files in a directory, except for files with a specific extension:

/<directory>/*
!/<directory>/*.<extension>

/temp/*
!/temp/*.csv

Note that the ".gitignore" file should be placed in the root of your repository, and the ignore patterns are relative to the root of the repository. The ".gitignore" file should be committed to the repository so that the ignore rules are applied to all collaborators.