Git Commit History Viewing: Master the log Command to Trace Project Changes

Git log is a core tool for viewing commit history, enabling tracking of code changes, issue location, or version rollbacks. The basic command `git log` by default displays full commit records, including hash values, authors, dates, and commit messages. Common parameters enhance efficiency: `--oneline` concisely shows key information in one line; `--graph` visualizes branch merge relationships; `-p` displays code differences (diff); `--since/--before` filters by time (e.g., `--since="3 days ago"`); `--author` filters commits by a specific author; `--stat` counts modified lines. Combining parameters is more practical, such as `git log --graph --oneline --all` to view merge relationships across all branches, `-n 5` to limit to the last 5 entries, and `--grep="login"` to filter commits containing the keyword. Mastering these techniques allows efficient project change management and clear understanding of code evolution.