What is the difference between backticks and $() in bash script? [duplicate]

Question

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What is the difference between $(command) and `command` in shell programming? (6 answers)

Closed 6 years ago.

I see in bash scripts two different forms which seems to do the same:

`some command`

and

$(some command)

What is the difference between the two, and when should I use each one of them?

Answer 1

There is no semantic difference. The backtick syntax is the older and less powerful version. See man bash, Section "Command Substitution".

If your shell supports the $() syntax, prefer it because it can be nested.