install docker

sfti

build image to a image name - imgname

docker build -t imgname .

run docker to a container name - ctname

docker run -d -p port:22 -v local:/root/dir --name ctname imgname /usr/sbin/sshd -D

in which portnum: like 10888 whatever local: a dir in local like /home/test

setting ssh host -- add to ~/.ssh/config

Host ctname HostName localhost User root Port portnum

connection

ssh ctname password: root

run whatever