Files
docker-cli/man/src/container/kill.md
Sebastiaan van Stijn 20138a81bc docker kill: don't set default signal on the client side
The default signal is already determined by the daemon, so the
CLI should not send a signal.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2022-05-13 10:10:17 +02:00

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The docker kill subcommand kills one or more containers. The main process inside the container is sent SIGKILL signal (default), or the signal that is specified with the --signal option. You can reference a container by its ID, ID-prefix, or name.

The --signal flag sets the system call signal that is sent to the container. This signal can be a signal name in the format SIG<NAME>, for instance SIGINT, or an unsigned number that matches a position in the kernel's syscall table, for instance 2.

While the default (SIGKILL) signal will terminate the container, the signal set through --signal may be non-terminal, depending on the container's main process. For example, the SIGHUP signal in most cases will be non-terminal, and the container will continue running after receiving the signal.

Note

ENTRYPOINT and CMD in the shell form run as a child process of /bin/sh -c, which does not pass signals. This means that the executable is not the containers PID 1 and does not receive Unix signals.