SC2301 – ShellCheck Wiki

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Parameter expansion starts with unexpected quotes. Double check syntax.

Problematic code:

echo ${"Hello World"}

Correct code:

echo $"Hello World"

Rationale:

ShellCheck found a parameter expansion ${...} that contains an unexpected syntax element, such as single or double quotes.

In the example, this was due to wrapping a translated string $".." with curly braces, which is not valid.

It is unclear what the intention is with invalid expansions like ${'foo'}, ${$"foo"}, so please look up how to do what you were trying to do.

Exceptions:

If this warning triggers for working code, please submit a bug.

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ShellCheck is a static analysis tool for shell scripts. This page is part of its documentation.