git submodule update时Permission

在Github上找了一个有意思的项目 flowkey/UIKit-cross-platform，运行git submodule update --init --recursive,结果报了如下错误，

git submodule update --init --recursive

Cloning into '/Users/keke/Documents/GitHub/UIKit-cross-platform/SDL'...

Cloning into '/Users/keke/Documents/GitHub/UIKit-cross-platform/swift-android-toolchain'...

Cloning into '/Users/keke/Documents/GitHub/UIKit-cross-platform/swift-jni'...

Submodule path 'SDL': checked out '9cdeedb713f959ed6192cf5209b609d5cfa88be1'

Submodule 'external/SDL_ttf' (git@github.com:flowkey/SDL_ttf-mirror.git) registered for path 'SDL/external/SDL_ttf'

Submodule 'sdl-gpu' (git@github.com:flowkey/sdl-gpu.git) registered for path 'SDL/external/sdl-gpu'

Cloning into '/Users/keke/Documents/GitHub/UIKit-cross-platform/SDL/external/SDL_ttf'...

git@github.com: Permission denied (publickey).

fatal: Could not read from remote repository.

发现公司电脑上的ssh公钥没有上传到Github，上传后解决问题。

附：ssh key 上传流程