git错误解决

lulei1@lulei1-Lenovo-Product:~/githubtest$ git push -u origin master 
To [e-mail]:leilu2008/testgit
 ! [rejected]        master -> master (non-fast-forward)
error: failed to push some refs to '[e-mail]:leilu2008/testgit'
To prevent you from losing history, non-fast-forward updates were rejected
Merge the remote changes (e.g. 'git pull') before pushing again.  See the

'Note about fast-forwards' section of 'git push --help' for details.

lulei1@lulei1-Lenovo-Product:~/githubtest$ git push  origin +master 
Counting objects: 6, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (6/6), 469 bytes, done.
Total 6 (delta 0), reused 0 (delta 0)
To [e-mail]:leilu2008/testgit
 + 1c8ed32...e052e85 master -> master (forced update)