• Replace crlf

git config core.autocrlf true

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• Remote branch delete

git push origin --delete <branchName>

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• Apply new gitignore

To untrack a single file that has already been added/initialized to your repository, i.e., stop tracking the file but not delete it from your system use: git rm --cached filename
To untrack every file that is now in your .gitignore:
First commit any outstanding code changes, and then, run this command:
git rm -r --cached .
This removes any changed files from the index(staging area), then just run:
git add .
Commit it:
git commit -m ".gitignore is now working"

To undo git rm –cached filename, use git add filename

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• Undo all uncommitted changes

git checkout .

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• file log

Git log -1 -- file.name

• fix error Cant't ref..

$ git gc --prune=now

$ git remote prune origin

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• 恢复误删除文件, notepad++ 把换行\r\n换成;一次执行多个文件

1. Use git log –diff-filter=D –summary to get all the commits which have deleted files and the files deleted;
2. Use git checkout $commit~1 filename to restore the deleted file.

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• Prevent gc

git config --global gc.auto 0

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• View file log

Gitk <filename>

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• Getting existing git branches to track remote branches

git branch --track origin/branch_name

[source](http://stackoverflow.com/questions/1184518/getting-existing-git-branches-to-track-remote-branches>

• rollback git repo to specific commit

git reset --hard <tag/branch/commit id>
git checkout HEAD -- my-file.txt
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• Log search

git log --grep="Build 0051"

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• reverting specific commits from git
  $ git revert --no-commit b49eb8e 1d8b062
  Files that were modified in those 2 commits will be changed in your working directory
  If any of those 2 commits had changed ‘a’ then you could discard the revert for it:
  $ git checkout a
$ git commit -a -m "Revert commits b49eb8e and 1d8b062"

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