Docker CLI

docker export

Description

Export a container’s filesystem as a tar archive

Usage

docker export [OPTIONS] CONTAINER

Examples

docker export red_panda > latest.tar
docker export --output="latest.tar" red_panda

docker import

Description

Import the contents from a tarball to create a filesystem image

Usage

docker import [OPTIONS] file|URL|- [REPOSITORY[:TAG]]

Examples

docker import https://example.com/exampleimage.tgz
cat exampleimage.tgz | docker import - exampleimagelocal:new
sudo tar -c . | docker import --change "ENV DEBUG=true" - exampleimagedir

docker load

Description

Load an image from a tar archive or STDIN

Usage

docker load [OPTIONS]

Examples

docker load < busybox.tar.gz
docker images
docker load --input fedora.tar
docker images

docker save

Description

Save one or more images to a tar archive (streamed to STDOUT by default)

Usage

docker save [OPTIONS] IMAGE [IMAGE...]

Examples

docker save busybox > busybox.tar
ls -sh busybox.tar
docker save --output busybox.tar busybox
ls -sh busybox.tar
docker save -o fedora-all.tar fedora
docker save -o fedora-latest.tar fedora:latest

docker tag

Description

Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE

Usage

docker tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[:TAG]

Examples

Tag an image referenced by ID

docker tag 0e5574283393 fedora/httpd:version1.0

Tag an image referenced by Name

docker tag httpd fedora/httpd:version1.0

Tag an image referenced by Name and Tag

docker tag httpd:test fedora/httpd:version1.0.test

Tag an image for a private repository

docker tag 0e5574283393 myregistryhost:5000/fedora/httpd:version1.0

docker top

Display the running processes of a container

Usage

docker top CONTAINER [ps OPTIONS]

docker update

Description

The docker update command dynamically updates container configuration

Usage

docker update [OPTIONS] CONTAINER [CONTAINER...]

Examples

docker update --cpu-shares 512 abebf7571666
docker update --cpu-shares 512 -m 300M abebf7571666 hopeful_morse
docker update --kernel-memory 80M test
docker update --restart=on-failure:3 abebf7571666 hopeful_morse

References