What git command do you need to use to know who changed certain lines in a specific file?

To determine who changed certain lines in a specific file, you can use the git blame command. The git blame command displays the commit and author information for each line of a file, showing who made the last modification to that line and in which commit.

Here’s the Git command to use git blame:

git blame <file-path>

Replace <file-path> with the path to the specific file you want to analyze. For example:

git blame myfile.txt

Running this command will display an output that looks something like this:

^1a2b3c4d (John Doe 2023-07-20 13:30:00 +0000  1) First line of the file
^5e6f7g8h (Alice Smith 2023-07-21 08:45:00 +0000  2) Second line of the file
^9i0j1k2l (John Doe 2023-07-21 14:10:00 +0000  3) Third line of the file

The output shows the commit hash, author name, date, and the line number for each line of the file. The caret symbol ^ before the commit hash indicates that the line is part of the specified commit.

By using git blame, you can track changes made to specific lines in a file and identify the authors responsible for those changes. This can be helpful for understanding the history of a file, tracing the origin of specific code changes, and collaborating effectively with other developers.

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