Bash failure from cmd line about docs HOT 3 OPEN

Is <pid> in your case the ID of the postgres container, or is it of another container?

Depending on the container you're trying to exec into, that command may fail if bash is not present inside your container; it's common for containers to only contain the minimum amount of tools (to have a smaller attack surface); if a shell is present inside the container, you may try using sh instead (which should be available for images based on a linux distro)

from docs.

from docs.

The docker exec part on that page describes running docker exec into the postgres container (which uses the postgres:latest image if I'm not mistaken);

I did not go through the full example, but trying a more minimal example with the postgres image, and running docker exec in that container works, so I wondered if you were trying to docker exec into another container (which may not have bash installed);

docker run -d --name mypostgres -e POSTGRES_DB=example -e POSTGRES_PASSWORD=password postgres

docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED             STATUS             PORTS      NAMES
c0d124d2465d   postgres       "docker-entrypoint.s…"   3 seconds ago       Up 2 seconds       5432/tcp   mypostgres


docker exec -it c0d124d2465d bash
root@c0d124d2465d:/# exit
exit

from docs.