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Diffstat (limited to 'doc/md/docker/docker-101.md')
| -rw-r--r-- | doc/md/docker/docker-101.md | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/doc/md/docker/docker-101.md b/doc/md/docker/docker-101.md index d12a1324..271dcd5b 100644 --- a/doc/md/docker/docker-101.md +++ b/doc/md/docker/docker-101.md | |||
| @@ -61,16 +61,14 @@ Digest: sha256:c584131da2ac1948aa3e66468a4424b6aea2f33acba7cec0b631bdb56254c4fe | |||
| 61 | Status: Downloaded newer image for debian:wheezy | 61 | Status: Downloaded newer image for debian:wheezy |
| 62 | ``` | 62 | ``` |
| 63 | 63 | ||
| 64 | Docker re-uses layers already downloaded. Iow. if you have only images based on some Alpine or Ubuntu version for example, those can share disk space. | 64 | Docker re-uses layers already downloaded. Iow. if you have images based only Alpine or some Ubuntu version for example, those can share disk space. |
| 65 | 65 | ||
| 66 | ### Start a container | 66 | ### Start a container |
| 67 | A container is an instance created from an image, that can be run and that keeps running until its main process exits. Or until the user stops the container. | 67 | A container is an instance created from an image, that can be run and that keeps running until its main process exits. Or until the user stops the container. |
| 68 | 68 | ||
| 69 | The simplest way to start a container from image is ``docker run``. It also pulls the image for you if it is not locally available. For more advanced use, refer to ``docker create``. | 69 | The simplest way to start a container from image is ``docker run``. It also pulls the image for you if it is not locally available. For more advanced use, refer to ``docker create``. |
| 70 | 70 | ||
| 71 | Note that stopped containers are not destroyed, unless you specify ``--rm``. | 71 | Note that stopped containers are not destroyed, unless you specify ``--rm``. To view all created, running and stopped containers, enter: |
| 72 | To view all created, running and stopped containers, enter: | ||
| 73 | |||
| 74 | ```bash | 72 | ```bash |
| 75 | $ docker ps -a | 73 | $ docker ps -a |
| 76 | ``` | 74 | ``` |
| @@ -78,8 +76,7 @@ $ docker ps -a | |||
| 78 | Some containers may be designed or configured to be restarted, others are not. Note that both network ports and volumes of a container are created on start, and not editable later. | 76 | Some containers may be designed or configured to be restarted, others are not. Note that both network ports and volumes of a container are created on start, and not editable later. |
| 79 | 77 | ||
| 80 | ### Access a running container | 78 | ### Access a running container |
| 81 | A running container is accessible using ``docker exec``, or ``docker copy``. | 79 | A running container is accessible using ``docker exec``, or ``docker copy``. You can use ``exec`` to start a root shell in the Shaarli container: |
| 82 | You can use ``exec`` to start a root shell in the Shaarli container: | ||
| 83 | ```bash | 80 | ```bash |
| 84 | $ docker exec -ti <container-name-or-id> bash | 81 | $ docker exec -ti <container-name-or-id> bash |
| 85 | ``` | 82 | ``` |
| @@ -90,8 +87,7 @@ Access can also be through one or more network ports, or disk volumes. Both are | |||
| 90 | ### Docker disk use | 87 | ### Docker disk use |
| 91 | Trying out different images can fill some gigabytes of disk quickly. Besides images, the docker volumes usually take up most disk space. | 88 | Trying out different images can fill some gigabytes of disk quickly. Besides images, the docker volumes usually take up most disk space. |
| 92 | 89 | ||
| 93 | If you care only about trying out docker and not about what is running or saved, | 90 | If you care only about trying out docker and not about what is running or saved, the following commands should help you out quickly: |
| 94 | the following commands should help you out quickly: | ||
| 95 | 91 | ||
| 96 | ```bash | 92 | ```bash |
| 97 | $ docker rmi -f $(docker images -aq) # remove or mark all images for disposal | 93 | $ docker rmi -f $(docker images -aq) # remove or mark all images for disposal |