Stop / remove all Docker containers

$ docker stop $(docker ps -a -q)
$ docker rm $(docker ps -a -q)

1. List containers with docker ps. -a/--all include also the stopped ones and -q/--quiet display only the numeric IDs.
2. Use docker stop and docker rm with the output of the first command (got from bash command substitution).

References:

• https://docs.docker.com/engine/reference/commandline/ps/
• https://docs.docker.com/engine/reference/commandline/stop/
• https://docs.docker.com/engine/reference/commandline/rm/
• https://www.gnu.org/software/bash/manual/bashref.html\#Command-Substitution