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Docker pull command
docker pull command tutorial
The docker pull command is used to pull or update a specified image from a mirror repository. The name in the docker pull command, that is, the image name, can be followed by the image label or image summary.
If the docker pull command does not specify an image tag, docker uses the :latest tag by default.
docker pull command syntax
[root@localhost ~]# docker pull [OPTIONS] NAME[:TAG|@DIGEST]
docker pull command parameters
| parameter | describe |
|---|---|
| docker pull -a | Pull all tagged images. |
| docker pull --disable-content-trust | Ignore the verification of the image, which is enabled by default. |
the case
Pull the latest version of the mirror
We use the docker pull command to pull the latest version of the nginx image.
[root@localhost ~]# docker pull nginx
Because we did not specify a tag, the latest image is pulled here by default. After the pull is completed, the terminal displays the following image:
Now we use the docker images command to view the nginx image just pulled, and the terminal display is as follows:
Use the docker rmi command to remove all images.
[root@localhost ~]# docker rmi `docker images -q`
Pull the specified TAG image
We use the docker pull command to pull the ubuntu image of the specified TAG.
[root@localhost ~]# docker pull ubuntu:14.04
After the pull is complete, the terminal will display as shown in the following figure:
Because we have specified the version information of docker images here, the latest version will not be pulled, but the version we specified will be pulled.
Now we use the docker images command to view the ubuntu image just pulled, and the terminal display is as follows:
Use the docker rmi command to remove all images.
[root@localhost ~]# docker rmi `docker images -q`
Pull all mirrors
The docker pull command will only pull one image by default. We can use the -a parameter to specify to pull all images.
[root@localhost ~]# docker pull ubuntu -a
After the pull is complete, the terminal will display as shown in the following figure:
Now we use the docker images command to view the ubuntu image just pulled, and the terminal display is as follows:
We can see that all the images of ubuntu versions are pulled here, not just one.
Use the docker rmi command to remove all images.
[root@localhost ~]# docker rmi `docker images -q`
Summary of docker pull command
The docker pull command is used to pull or update a specified image from a mirror repository.
If the docker pull command does not specify an image tag, docker uses the :latest tag by default.
The docker pull command will only pull one image by default. We can use the -a parameter to specify to pull all images.
docker pull command syntax:
docker pull [OPTIONS] NAME[:TAG|@DIGEST]