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function keyword is non-standard. Delete it.

Problematic code:

#!/bin/sh
function hello() {
  echo "Hello World"
}

Correct code:

#!/bin/sh
hello() {
  echo "Hello World"
}

Rationale:

function is a non-standard keyword that can be used to declare functions in Bash and Ksh.

In POSIX sh and dash, a function is instead declared without the function keyword as in the correct example.

Exceptions:

None.

Related resources:

• Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!

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