【flutter 入门】Waiting for another flutter command to release the startup lock...

执行 Flutter 包管理相关命令时有可能遇到 Waiting for another flutter command to release the startup lock... 这样的错误，可尝试杀死所有的 dart 进程解决：

// Linux
killall -9 dart

// Windows
taskkill /F /IM dart.exe

2020/07/26更新：

经 

@Bo Guo

 测试，亦可通过删除 flutter 安装目录下的 bin/cache/lockfile 文件解决。

参考：

• Waiting for another flutter command to release the startup lock