Git rollback command

Revoke Operation

• Basic command

  $ git checkout -- [file]

• When file just in work area conduct modify, Not yet(还没有) commit to temporary(暂存) storage.
  You can use this command, To achieve effect(来达到效果)

  $ git reset HEAD

• If you in work area conduct the modify, And commit to temporary. `git checkout – [file]` command
  it’s invalid(就无效了).
  This time should use `git reset HEAD` command to achieve effect.

  $ git checkout HEAD [file]

• This command just will two on the top combine(组合起来), Direct use HEAD cover(覆盖) temporary and
  word area.

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Rollback Version

• Basic command

  $ git reset --hard HEAD~n

• In git `HEAD` express current version. This command just rollback to `~` after appoint version.

  $ git reset --hard commit_id

• This command just rollback to `commit<sub>id</sub>` version.
  In git see commit_id the method: git reflog command.

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Delete Summary

• Basic command

  $ git rm

• This command will delete word area and temporary in content.

• If delete file after, Want to get back(想要找回) just got us(刚刚被我们) delete the file.Use `git checkout HEAD [file]` command to achieve effect. Permise is(前提是) not commit.

• If delete file after and commit, Then you need use `git reset –hard HEAD~1` rollback
  to one on top version, Can achieve effect(可以达到效果).

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