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From: "Chris F.A. Johnson" <chris@cfajohnson.com>
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Subject: Re: Preventing Bash Variable Confusion
Date: Wed, 29 Jan 2020 09:37:23 -0500 (EST)
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On Wed, 29 Jan 2020, Greg Wooledge wrote:

> As long as you use at least one lowercase letter in your variable name,
> you are guaranteed not to conflict with any internal shell variables.

    Except for auto_resume and histchars.

-- 
    Chris F.A. Johnson                         <http://cfajohnson.com/>
    =========================== Author: ===============================
    Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
    Pro Bash Programming: Scripting the GNU/Linux shell (2009, Apress)