docker OCI runtime exec failed: exec failed: container_linux.go:349: starting container process caused "exec: \"bash\": executable file not found in $PATH": unknown

docker进入容器：docker exec -it 4fdcb8d5185e bash  
报错：OCI runtime exec failed: exec failed: container_linux.go:349: starting container process caused "exec: \"bash\": executable file not found in $PATH": unknown

解决方法：docker exec -it 4fdcb8d5185e sh