Fix Bash Error in Docker

By  on  

I really enjoy working with Docker because it gives me more insight into creating and maintaining your own environments, mostly from scratch.  I instantly gained a greater appreciation for Ops engineers, package creators, and other engineers who work on low level software.  I think what I'm trying to say is that I've made a whole bunch of mistakes and completed an insane amount of Google searches for help.

One of the more basic errors I've recently encountered was trying to run a bash script within the container, only to get the following error:  env: can't execute 'bash': No such file or directory.  I was under the impression that bash was always a given in Linux machines, but apparently not in alpine images.  The fix was adding the following to my Dockerfile file:

RUN apk update && apk add bash

Or if you're in the machine, just run:

apk update && apk add bash

That command installs bash and your bash scripts should then work!

Recent Features

  • By
    Page Visibility API

    One event that's always been lacking within the document is a signal for when the user is looking at a given tab, or another tab. When does the user switch off our site to look at something else? When do they come back?

  • By
    JavaScript Promise API

    While synchronous code is easier to follow and debug, async is generally better for performance and flexibility. Why "hold up the show" when you can trigger numerous requests at once and then handle them when each is ready?  Promises are becoming a big part of the JavaScript world...

Incredible Demos

  • By
    Create a Context Menu with Dojo and Dijit

    Context menus, used in the right type of web application, can be invaluable.  They provide shortcut methods to different functionality within the application and, with just a right click, they are readily available.  Dojo's Dijit frameworks provides an easy way to create stylish, flexible context...

  • By
    JavaScript Canvas Image Conversion

    At last week's Mozilla WebDev Offsite, we all spent half of the last day hacking on our future Mozilla Marketplace app. One mobile app that recently got a lot of attention was Instagram, which sold to Facebook for the bat shit crazy price of one...

Discussion

  1. Hamish

    Alternatively, you can use ash instead of bash.

    Not sure what the differences are, but I would expect parity on most standard features.

  2. If the script is simple you can use the default /bin/sh shell.

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!