查看docker镜像的修改历史记录
docker history [docker-image]
eg.
$ docker history test/b
IMAGE CREATED CREATED BY SIZE
c0daf4be2ed4 3 hours ago /bin/sh -c touch /opt/b.txt 8 B
9977b78fbad7 3 hours ago /bin/sh -c apt-get install -y apache2 54.17 MB
e83b3bf07b42 3 hours ago /bin/sh -c apt-get update 20.67 MB
9cd978db300e 3 months ago /bin/sh -c #(nop) ADD precise.tar.xz in / 204.4 MB
6170bb7b0ad1 3 months ago /bin/sh -c #(nop) MAINTAINER Tianon Gravi <ad 0 B
511136ea3c5a 10 months ago
