mirror of https://github.com/docker/cli.git
75 lines
2.3 KiB
Markdown
75 lines
2.3 KiB
Markdown
# kill
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Kill one or more running containers
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### Aliases
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`docker container kill`, `docker kill`
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### Options
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| Name | Type | Default | Description |
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|:---------------------------------------|:---------|:--------|:--------------------------------|
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| [`-s`](#signal), [`--signal`](#signal) | `string` | | Signal to send to the container |
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## Description
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The `docker kill` subcommand kills one or more containers. The main process
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inside the container is sent `SIGKILL` signal (default), or the signal that is
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specified with the `--signal` option. You can reference a container by its
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ID, ID-prefix, or name.
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The `--signal` flag sets the system call signal that is sent to the container.
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This signal can be a signal name in the format `SIG<NAME>`, for instance `SIGINT`,
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or an unsigned number that matches a position in the kernel's syscall table,
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for instance `2`.
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While the default (`SIGKILL`) signal will terminate the container, the signal
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set through `--signal` may be non-terminal, depending on the container's main
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process. For example, the `SIGHUP` signal in most cases will be non-terminal,
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and the container will continue running after receiving the signal.
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> **Note**
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>
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> `ENTRYPOINT` and `CMD` in the *shell* form run as a child process of
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> `/bin/sh -c`, which does not pass signals. This means that the executable is
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> not the container’s PID 1 and does not receive Unix signals.
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## Examples
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### Send a KILL signal to a container
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The following example sends the default `SIGKILL` signal to the container named
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`my_container`:
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```console
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$ docker kill my_container
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```
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### <a name="signal"></a> Send a custom signal to a container (--signal)
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The following example sends a `SIGHUP` signal to the container named
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`my_container`:
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```console
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$ docker kill --signal=SIGHUP my_container
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```
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You can specify a custom signal either by _name_, or _number_. The `SIG` prefix
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is optional, so the following examples are equivalent:
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```console
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$ docker kill --signal=SIGHUP my_container
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$ docker kill --signal=HUP my_container
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$ docker kill --signal=1 my_container
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```
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Refer to the [`signal(7)`](https://man7.org/linux/man-pages/man7/signal.7.html)
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man-page for a list of standard Linux signals.
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