du -sh *
这个命令用来查看根目录下，所有文件的大小分布
604K Applications
165M CRClientTools
1.2M Desktop
802M Documents
2.0G Downloads
216M GitBook
du: Library/Python: Permission denied
86G Library

du -sh Library
du: Library/Python: Permission denied
86G Library

cd ~/Library
du -d 1 -h
16K ./com.lc-tech.licman
0B ./Compositions
66G ./Containers

$du -d 1 -h
280K ./com.apple.WeatherKitService
64G ./com.docker.docker

$cd ./com.docker.docker
$du -d 1 -h
64G ./Data
64G .

cd ./Data/

$du -d 1 -h
64G ./com.docker.driver.amd64-linux
$cd ./com.docker.driver.amd64-linux

$ls -al
-rw-r–r–@ 1 didi staff 68667637760 12 17 17:50 Docker.qcow2

docker for mac 有个bug，删除了容器或者镜像后，docker 占用的电脑硬盘空间不会相应的减少（Docker.qcow2文件）。
https://blog.mrtrustor.net/post/clean-docker-for-mac/
https://gist.github.com/MrTrustor/e690ba75cefe844086f5e7da909b35ce#file-clean-docker-for-mac-sh
这位法国老哥写了个脚本自动把docker镜像保存到本地， 删除Docker.qcow2文件，重启docker ，再把保存下来的镜像 load 到docker 中。

#!/bin/bash

Copyright 2017 Théo Chamley

Permission is hereby granted, free of charge, to any person obtaining a copy of

this software and associated documentation files (the “Software”), to deal in the Software

without restriction, including without limitation the rights to use, copy, modify, merge,

publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons

to whom the Software is furnished to do so, subject to the following conditions:

#

The above copyright notice and this permission notice shall be included in all copies or

substantial portions of the Software.

#

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING

BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

IMAGES=$@

echo “This will remove all your current containers and images except for:”
echo ${IMAGES}
read -p “Are you sure? [yes/NO] “ -n 1 -r
echo # (optional) move to a new line
if [[ ! $REPLY =~ ^[Yy]$ ]]
then
exit 1
fi

TMP_DIR=$(mktemp -d)

pushd $TMP_DIR >/dev/null

open -a Docker
echo “=> Saving the specified images”
for image in ${IMAGES}; do
echo “==> Saving ${image}”
tar=$(echo -n ${image} | base64)
docker save -o ${tar}.tar ${image}
echo “==> Done.”
done

echo “=> Cleaning up”
echo -n “==> Quiting Docker”
osascript -e ‘quit app “Docker”’
while docker info >/dev/null 2>&1; do
echo -n “.”
sleep 1
done;
echo “”

echo “==> Removing Docker.qcow2 file”
rm ~/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/Docker.qcow2

echo “==> Launching Docker”
open -a Docker
echo -n “==> Waiting for Docker to start”
until docker info >/dev/null 2>&1; do
echo -n “.”
sleep 1
done;
echo “”

echo “=> Done.”

echo “=> Loading saved images”
for image in ${IMAGES}; do
echo “==> Loading ${image}”
tar=$(echo -n ${image} | base64)
docker load -q -i ${tar}.tar || exit 1
echo “==> Done.”
done

popd >/dev/null
rm -r ${TMP_DIR}

$docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
hub.c.163.com/mrjucn/centos6.5-mysql5.1-php5.7-nginx latest 726cb1dfd4b7 2 years ago 2.78 GB
hub.c.163.com/public/redis 2.8.4 4888527e1254 2 years ago 190 MB
hub.c.163.com/longjuxu/microbox/etcd latest 6aef84b9ec5a 3 years ago 17.9 MB

$sh file-clean-docker-for-mac.sh 726cb1dfd4b7 4888527e1254 6aef84b9ec5a
This will remove all your current containers and images except for:
726cb1dfd4b7 4888527e1254 6aef84b9ec5a
Are you sure? [yes/NO] y
=> Saving the specified images
==> Saving 726cb1dfd4b7