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# 查看尚未暂存的文件更新了哪些部分
git diff
# 查看尚未暂存的某个文件更新了哪些
git diff filename
# 查看已经暂存起来的文件和上次提交的版本之间的差异
git diff –cached
# 查看已经暂存起来的某个文件和上次提交的版本之间的差异
git diff –cached filename
# 查看某两个版本之间的差异
git diff ffd98b291e0caa6c33575c1ef465eae661ce40c9 b8e7b00c02b95b320f14b625663fdecf2d63e74c
# 查看某两个版本的某个文件之间的差异
git diff ffd98b291e0caa6c33575c1ef465eae661ce40c9:filename b8e7b00c02b95b320f14b625663fdecf2d63e74c:filename