533  mkdir HelloWorld
  534  cd ~
  535  mkdri HelloWorld
  536  mkdir HelloWorld
  537  cd HelloWorld/
  538  git init
  539  touch README
  540  vi README 
  541  git add README
  542  git commit -m 'first commit'
  543  git remote add origin [email protected]:jenkinv/HelloWorld.git
  544  git push -u origin master
  545  git push -u origin master -p22
  546  git push -u origin master
  547  vi text.txt
  548  git add text.txt
  549  git commit text.txt -m "test"
  550  git push -u origin master
  551  git push origin master
  552  history
  553  history > README
  554  vi README 
  555  history -n10
  556  history 10
  557  history 30 > README

visit http://gitref.org/index.html for git study~~