1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
---
title: "kill"
description: "The kill command description and usage"
keywords: "container, kill, signal"
---
# kill
```markdown
Usage: docker kill [OPTIONS] CONTAINER [CONTAINER...]
Kill one or more running containers
Options:
--help Print usage
-s, --signal string Signal to send to the container (default "KILL")
```
## 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` (or `-s` shorthand) 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.
|
