diff

• 用法

  Usage: docker diff [OPTIONS] CONTAINER

  Inspect changes on a container's filesystem

  --help=false Print usage

• 例子

  $ sudo docker diff b448f729a0b0 C /run A /run/secrets

• 总结

diff会列出3种容器内文件状态变化（A - Add, D - Delete, C - Change ）的列表清单。构建Image的过程中需要的调试指令。