Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).

root@ubuntux86:/work/img_repo# git remote add origin https://github.com/magnate3/img_repo.git
fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
root@ubuntux86:/work/img_repo# ls
先git init
root@ubuntux86:/work/img_repo# git init
Initialized empty Git repository in /work/img_repo/.git/
root@ubuntux86:/work/img_repo# git remote add origin https://github.com/magnate3/img_repo.git
root@ubuntux86:/work/img_repo#