1.在gitee、github、coding创建相同名字项目

1	比如：账号名: hihahoo 仓库名: hihahoo.github.io

2.关联远程仓库

git init
git remote add gitee https://gitee.com/hihahoo/hihahoo.github.io
git remote add github https://github.com/hihahoo/hihahoo.github.io
git remote add coding https://coding.com/hihahoo/hihahoo.github.io

3.拉取github仓库代码至本地。同步代码至其他仓库

git pull github master
From https://github.com/d551599736/d551599736.github.io
 * branch            master     -> FETCH_HEAD
fatal: refusing to merge unrelated histories  #报错
git pull github master --allow-unrelated-histories #添加 不用关联历史参数
git push gitee master #上传 gitee仓库
git push coding master #上传coding仓库	
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details. #报错
git push -f coding master
## 远程仓库的文件跟本地不一致，需要强制上传