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From: "Carlos E. R." <robin_listas@es.invalid>
Newsgroups: comp.os.linux.misc
Subject: Re: correct quoting for variables in bash scripts?
Date: Mon, 17 Oct 2022 14:39:55 +0200
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On 17/10/2022 13.28, Barry Stir wrote:
> I see various formats, such as
>    if [[ -L ${LINK1_DIR} ]]; then
> 
>    if [[ -L "$LINK1_DIR" ]]; then
> 
> rather than just $LINK1_DIR
> I presume this is insurance to ensure script works in every version of 
> Red Hat, Debian, Arch whatever...

There are no differences among distributions. Bash is bash everywhere.

> So which is the ideal extra character to put around the environment 
> variable?

Others have explained it well in their posts.


-- 
Cheers,
        Carlos E.R.