docker-container-exec - Run a command in a running container
docker container exec [OPTIONS] CONTAINER COMMAND [ARG...]
Run a process in a running container.
The command started using docker exec will only run while the
container's primary process (PID 1) is running, and will not be
restarted if the container is restarted.
If the container is paused, then the docker exec command will wait
until the container is unpaused, and then run
privileged gives the process extended Linux capabilities
<http://man7.org/linux/man-pages/man7/capabilities.7.html> when running
in a container.
Without this flag, the process run by docker exec in a running
container has the same capabilities as the container, which may be
limited. Set --privileged to give all capabilities to the process.
user sets the username or UID used and optionally the groupname or GID
for the specified command.
The followings examples are all valid:
--user [user | user:group | uid | uid:gid | user:gid | uid:group ]
Without this argument the command will be run as root in the container.
Detached mode: run command in the background
Override the key sequence for detaching a container
Set environment variables
Keep STDIN open even if not attached
Give extended privileges to the command
Allocate a pseudo-TTY
Username or UID (format: <name|uid>[:<group|gid>])
Docker Community Sep 2017 DOCKER(1)