clone git repo from github
$ git clone https://github.com/teinei/nju.git
dir can not push to github
$ git add *
$ git commit -m "first comment"
set global user name and email, or it will prompt you a lot
$ git config --global user.name "teinei"
$ git config --global user.email "teinei@laposter.net"
some prompt
warning: push.default is unset; its implicit value has changed in Git 2.0 from 'matching' to 'simple'. To squelch this message and maintain the traditional behavior, use:
git config --global push.default matching
To squelch this message and adopt the new behavior now, use:
git config --global push.default simple
When push.default is set to 'matching', git will push local branches to the remote branches that already exist with the same name.
Since Git 2.0, Git defaults to the more conservative 'simple' behavior, which only pushes the current branch to the corresponding remote branch that 'git pull' uses to update the current branch.
See 'git help config' and search for 'push.default' for further information. (the 'simple' mode was introduced in Git 1.7.11. Use the similar mode 'current' instead of 'simple' if you sometimes use older versions of Git)
git pull error
$ git pull
There is no tracking information for the current branch. Please specify which branch you want to merge with. See git-pull(1) for details.
git pull <remote> <branch>
If you wish to set tracking information for this branch you can do so with:
git branch --set-upstream-to=origin/<branch> master
or
git branch --set-upstream-to=origin/master master
git revert HEAD
use this command to bring back the last git rm *.md
git rm *.md
recover git deleted files
git revert HEAD