Usage:
# masuk ke container yg sedang aktif
docker exec -it [containerid] /bin/bash
# setting ssh
apt install ssh
# allow root login to ssh
echo "PermitRootLogin yes" >> /etc/ssh/sshd_config
# change password root
passwd
# start the SSH service on the container.
/etc/init.d/ssh start
# connect to ssh
ssh root@172.17.0.2 