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# kill
<!---MARKER_GEN_START-->
Kill one or more running containers
### Aliases
`docker container kill`, `docker kill`
### Options
| Name | Type | Default | Description |
|:---------------------------------------|:---------|:--------|:--------------------------------|
| [`-s`](#signal), [`--signal`](#signal) | `string` | | Signal to send to the container |
<!---MARKER_GEN_END-->
## Description
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 container’s PID 1 and does not receive Unix signals.
## Examples
### Send a KILL signal to a container
The following example sends the default `SIGKILL` signal to the container named
`my_container`:
```console
$ docker kill my_container
```
### <a name="signal"></a> Send a custom signal to a container (--signal)
The following example sends a `SIGHUP` signal to the container named
`my_container`:
```console
$ docker kill --signal=SIGHUP my_container
```
You can specify a custom signal either by _name_, or _number_. The `SIG` prefix
is optional, so the following examples are equivalent:
```console
$ docker kill --signal=SIGHUP my_container
$ docker kill --signal=HUP my_container
$ docker kill --signal=1 my_container
```
Refer to the [`signal(7)`](https://man7.org/linux/man-pages/man7/signal.7.html)
man-page for a list of standard Linux signals.
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