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update README with more actionable examples

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Motiejus Jakštys 2021-09-01 09:32:26 +03:00 committed by Motiejus Jakštys
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@ -40,25 +40,25 @@ Download `busybox` docker image from docker hub and convert it to a rootfs:
``` ```
$ skopeo copy docker://docker.io/busybox:latest docker-archive:busybox.tar $ skopeo copy docker://docker.io/busybox:latest docker-archive:busybox.tar
$ undocker busybox.tar - | tar -tv | head -10 $ undocker busybox.tar - | tar -xv | sponge | head -10; echo '<...>'
drwxr-xr-x 0/0 0 2021-05-17 22:07 bin/ bin/
-rwxr-xr-x 0/0 1149184 2021-05-17 22:07 bin/[ bin/[
hrwxr-xr-x 0/0 0 2021-05-17 22:07 bin/[[ link to bin/[ bin/[[
hrwxr-xr-x 0/0 0 2021-05-17 22:07 bin/acpid link to bin/[ bin/acpid
hrwxr-xr-x 0/0 0 2021-05-17 22:07 bin/add-shell link to bin/[ bin/add-shell
hrwxr-xr-x 0/0 0 2021-05-17 22:07 bin/addgroup link to bin/[ bin/addgroup
hrwxr-xr-x 0/0 0 2021-05-17 22:07 bin/adduser link to bin/[ bin/adduser
hrwxr-xr-x 0/0 0 2021-05-17 22:07 bin/adjtimex link to bin/[ bin/adjtimex
hrwxr-xr-x 0/0 0 2021-05-17 22:07 bin/ar link to bin/[ bin/ar
hrwxr-xr-x 0/0 0 2021-05-17 22:07 bin/arch link to bin/[ bin/arch
<...>
``` ```
You can also refer [here][2] for other ways to download Docker images. There Refer [here][2] for other ways to download Docker images. There are many.
are many.
Converting a [1.1GB Docker image with 77 On author's laptop converting a [1.1GB Docker image with 77
layers](https://hub.docker.com/r/homeassistant/home-assistant) takes around 4 layers](https://hub.docker.com/r/homeassistant/home-assistant) takes around 3
seconds and on a reasonably powerful Intel laptop. seconds and uses ~65MB of residential memory.
Usage example: systemd-nspawn Usage example: systemd-nspawn
----------------------------- -----------------------------