I have listed all the necessary commands of Docker below. In case if any is missing or if any improvement required, please share in comments so I can update accordingly. Thanks and enjoy tutorial.
1) docker –verison
display version
command
2) docker version
3) docker image ls
Display images
which are downloaded or created.
4) docker image pull
ubuntu:latest
Above command pull
image from docker hub.
5) docker container
run -it ubuntu:latest /bin/bash
Above command
launch and start image in container which is fetched in docker host
from above command.
6) ps -elf (inside
bash command)
7) Ctrl + PQ
(Command exit from bash but keep it running)
8) docker container
ls
Shows above
container running. Also container names in last column called
"NAMES"
9) docker container
exec -ti <container-name>/<container-id> bash
10) docker container
<container-name>/<container-id>
>>>>>>>>>>>DOCKER
DEVELOPER <<<<<<<<<<<<<<<<<<<<<<<<<<<
11) Create folder
and run command
git clone
https://github.com/nigelpoulton/psweb.git
12) Goto into new
folder created and run following command.
docker image build
-t test:latest .
13) docker image ls
14) docker container
run -d --name web1 -p 8080:8080 test:latest
15) docker container
ls
16) docker container
run --name zm -it ubuntu:latest sh
command generates
id
17) docker rm
<dockerid_generated_after_executing_command15>
18) Docker images
can be found inside
/var/lib/docker/
on linux
and on windows
inside c:\program data\docker\windowsfilter
19) docker image
inspect ubuntu:latest
20) docker image ls
--digests alpine
21) docker image rm
alpine:latest
Above command
Remove mentioned image e.g., remove alpine:latest
22) docker image
pull
alpine@sha26:a75afd8b57e7f34e4dad8d65e2c7ba2e1975c795ce1ee22fa34f8cf46f96a3be
Above command pull
image of alpine using digest. Digest is a hashcode which is created
from the contents of file itself. Advantage of it over Tag is that it
will never be the same. Tag can be mistakenly same. For example you
download image with the tag "latest" and also push/update
them image on server (e.g., DockerHub) with same Tag mistakenly. This
will not be possible with Digest as it uses file contents/image
contents to create Hash and image will always be change if you made
any change in it. Even a single word written in image will change
Digest/hash code of image.
23) docker image ls
-q
List all images IDs
24) docker image rm
$(docker image ls -q) -f
OR
docker container rm
$(docker container ls -aq) -f
1st command remove
all images from Docker/your system. Second command will remove all
containers from your system. The -f flag
forces the
operation so that running containers will also be destroyed.
25) docker container
run -it alpine:latest sleep 10
Hold above
container for 10 seconds and then sleep/exit from process.
26) usermod -aG
docker <user>
Above command will
add any user you mentioned to docker group.
27) service docker
status
and systemctl
is-active docker
Above both
commands check status of docker. 1st command will show some more
details where as second command will only show its status.
28) docker container
run --name myubuntu -it ubuntu:latest /bin/bash
Above command will
start your container. Exit from shell of container using Ctrl+PQ
without terminating the process. Please note that containter will be
Alive till any of the process is running inside it. Once no process
is alive, container will be terminated itself.
To reconnect with
the same process, you need to know container image id. Type following
command.
docker container ls
-q
This command will
provide your 12 characters of container image id (e.g.,
36aa4eb7a789).
To reconnect to the
image, use below command.
docker container
exec -it 36aa4eb7a789 bash
29) docker container
run -d --name webserver -p 80:8080 \
nigelpoulton/pluralsight-docker-ci
Above command will
download image of pluralSight from nigelpoulton dockerHUB Account
nigelpoulton/pluralsight-docker-ci. It will also
detach process and
start web server on 8080 port.
"d"
stands for daemon mode.
-it and -d are
mutually exlcusive modes/commands and can not be used together for
starting a container.
30) docker image
history web:latest
Display commands
history executed on particular image.
