This Docker image allows you to run Busybox commands on a Docker host (or anywhere) that may be missing some utilities. An example use case would be on Fedora CoreOS where you may not want additional packages layered in.
docker run --rm -v $PWD:/busybox rustic/busybox --help
Or for a system with SELinux (note the :z on the volume)
docker run --rm -v $PWD:/busybox:z rustic/busybox --help
You can specify read only on the volume mount a with :ro or :ro,z on SELinux.
docker run --rm -v $PWD:/busybox:ro,z rustic/busybox sha1sum file.txt
Of course you can skip the volume mount if you don't need to manipulate anything on the host.
docker run --rm rustic/busybox ping -c 4 google.com
Keep in mind that the container runs as root by default. Make sure you tell the container to run as a different user if different permissions are needed.
docker run --rm --user $(id -u):$(id -g) -v $PWD:/busybox:z rustic/busybox touch file.txt
or
docker run --rm --user 1001:1001 -v $PWD:/busybox:z rustic/busybox touch file.txt
You may of course build the container yourself
docker build -t busybox .