今天使用github时遇到了一个小错误：

[root@foundation38 demo]# git remote add origin git@github.com:xuefeilong/linux.git
fatal: remote origin already exists.

fatal: remote origin already exists._git

[root@foundation38 demo]# git remote add origin git@github.com:xuefeilong/linux.git
fatal: remote origin already exists.
[root@foundation38 demo]# git remote rm origin
[root@foundation38 demo]# git remote add origin git@github.com:xuefeilong/linux.git

fatal: remote origin already exists._github_02