Not many people are aware of a dash shell which is usually found in the Debian Linux distribution. Here's a quick introduction.

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Dash is a POSIX-compliant implementation of Bourne Shell. It replaces the /bin/sh in default scripts and provides better execution speed while consuming fewer resources.

What is Dash Shell in Linux?

<p>Thank you!
As a Linux newbie this is suprising and very interesting info.</p>
