Re: Bash: A Question

[Lawrence Velázquez]

> On Jun 3, 2020, at 7:21 AM, Greg Wooledge <wooledg@eeg.ccf.org>
> wrote:
> 
> On Wed, Jun 03, 2020 at 07:49:33AM +0200, Lord Sam wrote:
>> *echo "`echo \"\`echo \\"hello\\"\`\"`"*
>> 
>> and
>> 
>> *echo "$(echo "$(echo "hello")")"*
>> 
>> the former can be made, upon slightly adjusting the command, to
>> produce outputs that I could not find an explanation for, either
>> by trying to answer myself or by searching online.
> 
> That's why you don't *use* the backtick syntax.  It has been
> deprecated for decades.
> 
> Just use the $( ) syntax.

Here are some more details, if you're interested:

https://mywiki.wooledge.org/BashFAQ/082
https://wiki.bash-hackers.org/syntax/expansion/cmdsubst

vq