| #!/bin/sh | |
| # | |
| # Read-only Root-FS for Raspian | |
| # | |
| # Modified 2016 by Stefan Bonfert to make it compatible with Raspbian | |
| # Jessie (vanilla). | |
| # | |
| # Modified 2015 by Pascal Rosin to work on raspian-ua-netinst with | |
| # overlayfs integrated in Linux Kernel >= 3.18. | |
| # |
| [Unit] | |
| Description=Demonstrate Bash | |
| [Service] | |
| ExecStartPre=/usr/bin/bash -c "/usr/bin/systemctl set-environment MYVAR=$(( 2 + 2 ))" | |
| ExecStart=/usr/bin/ech "2 + 2 = ${MYVAR}" |
Imagine you're messing around in a container, and you install some stuff, add some config, and now it's time to load up your client and check it out! Oh wait, you forgot to forward ports when you created the container! Fear not, all is not lost, for in the world of pipes, and streams, there is always a way to do something disgusting.
Example Dockerfile included will install Nginx, and socat in a container, and make Nginx run in foreground mode. To build, and run:
| #!/bin/bash | |
| # | |
| # This version uses September 2016 rpi jessie image, please use this image | |
| # | |
| if [ "$EUID" -ne 0 ] | |
| then echo "Must be root" | |
| exit | |
| fi |