mirror of https://github.com/docker/cli.git
90 lines
4.2 KiB
Markdown
90 lines
4.2 KiB
Markdown
<!--[metadata]>
|
|
+++
|
|
title = "cp"
|
|
description = "The cp command description and usage"
|
|
keywords = ["copy, container, files, folders"]
|
|
[menu.main]
|
|
parent = "smn_cli"
|
|
+++
|
|
<![end-metadata]-->
|
|
|
|
# cp
|
|
|
|
Usage: docker cp [OPTIONS] CONTAINER:SRC_PATH DEST_PATH | -
|
|
docker cp [OPTIONS] SRC_PATH | - CONTAINER:DEST_PATH
|
|
|
|
Copy files/folders between a container and the local filesystem
|
|
|
|
-L, --follow-link Always follow symbol link in SRC_PATH
|
|
--help Print usage
|
|
|
|
The `docker cp` utility copies the contents of `SRC_PATH` to the `DEST_PATH`.
|
|
You can copy from the container's file system to the local machine or the
|
|
reverse, from the local filesystem to the container. If `-` is specified for
|
|
either the `SRC_PATH` or `DEST_PATH`, you can also stream a tar archive from
|
|
`STDIN` or to `STDOUT`. The `CONTAINER` can be a running or stopped container.
|
|
The `SRC_PATH` or `DEST_PATH` can be a file or directory.
|
|
|
|
The `docker cp` command assumes container paths are relative to the container's
|
|
`/` (root) directory. This means supplying the initial forward slash is optional;
|
|
The command sees `compassionate_darwin:/tmp/foo/myfile.txt` and
|
|
`compassionate_darwin:tmp/foo/myfile.txt` as identical. Local machine paths can
|
|
be an absolute or relative value. The command interprets a local machine's
|
|
relative paths as relative to the current working directory where `docker cp` is
|
|
run.
|
|
|
|
The `cp` command behaves like the Unix `cp -a` command in that directories are
|
|
copied recursively with permissions preserved if possible. Ownership is set to
|
|
the user and primary group at the destination. For example, files copied to a
|
|
container are created with `UID:GID` of the root user. Files copied to the local
|
|
machine are created with the `UID:GID` of the user which invoked the `docker cp`
|
|
command. If you specify the `-L` option, `docker cp` follows any symbolic link
|
|
in the `SRC_PATH`. `docker cp` does *not* create parent directories for
|
|
`DEST_PATH` if they do not exist.
|
|
|
|
Assuming a path separator of `/`, a first argument of `SRC_PATH` and second
|
|
argument of `DEST_PATH`, the behavior is as follows:
|
|
|
|
- `SRC_PATH` specifies a file
|
|
- `DEST_PATH` does not exist
|
|
- the file is saved to a file created at `DEST_PATH`
|
|
- `DEST_PATH` does not exist and ends with `/`
|
|
- Error condition: the destination directory must exist.
|
|
- `DEST_PATH` exists and is a file
|
|
- the destination is overwritten with the source file's contents
|
|
- `DEST_PATH` exists and is a directory
|
|
- the file is copied into this directory using the basename from
|
|
`SRC_PATH`
|
|
- `SRC_PATH` specifies a directory
|
|
- `DEST_PATH` does not exist
|
|
- `DEST_PATH` is created as a directory and the *contents* of the source
|
|
directory are copied into this directory
|
|
- `DEST_PATH` exists and is a file
|
|
- Error condition: cannot copy a directory to a file
|
|
- `DEST_PATH` exists and is a directory
|
|
- `SRC_PATH` does not end with `/.`
|
|
- the source directory is copied into this directory
|
|
- `SRC_PATH` does end with `/.`
|
|
- the *content* of the source directory is copied into this
|
|
directory
|
|
|
|
The command requires `SRC_PATH` and `DEST_PATH` to exist according to the above
|
|
rules. If `SRC_PATH` is local and is a symbolic link, the symbolic link, not
|
|
the target, is copied by default. To copy the link target and not the link, specify
|
|
the `-L` option.
|
|
|
|
A colon (`:`) is used as a delimiter between `CONTAINER` and its path. You can
|
|
also use `:` when specifying paths to a `SRC_PATH` or `DEST_PATH` on a local
|
|
machine, for example `file:name.txt`. If you use a `:` in a local machine path,
|
|
you must be explicit with a relative or absolute path, for example:
|
|
|
|
`/path/to/file:name.txt` or `./file:name.txt`
|
|
|
|
It is not possible to copy certain system files such as resources under
|
|
`/proc`, `/sys`, `/dev`, and mounts created by the user in the container.
|
|
|
|
Using `-` as the `SRC_PATH` streams the contents of `STDIN` as a tar archive.
|
|
The command extracts the content of the tar to the `DEST_PATH` in container's
|
|
filesystem. In this case, `DEST_PATH` must specify a directory. Using `-` as
|
|
the `DEST_PATH` streams the contents of the resource as a tar archive to `STDOUT`.
|