如何处理 git使用中push报错

[root@361way shell]# git push
warning: push.default is unset; its implicit value is changing in
Git 2.0 from 'matching' to 'simple'. To squelch this message
and maintain the current behavior after the default changes, use:
git config --global push.default matching
To squelch this message and adopt the new behavior now, use:
git config --global push.default simple
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)

[root@361way shell]# git config --global push.default matching

[root@361way shell]# git push -u origin master
To https://361way:mypassword@github.com/361way/shell.git
! [rejected] master -> master (fetch first)
error: failed to push some refs to 'https://361way:mypassword@github.com/361way/shell.git'
hint: Updates were rejected because the remote contains work that you do
hint: not have locally. This is usually caused by another repository pushing
hint: to the same ref. You may want to first merge the remote changes (e.g.,
hint: 'git pull') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.

[root@361way shell]# git push -u origin master --force