SC1044 – ShellCheck Wiki

Couldn't find end token `EOF` in the here document.

Problematic code:

cat << EOF
  Hello World

Correct code:

cat << EOF
  Hello World
EOF

Rationale:

The << here document (aka heredoc) was not properly terminated. The terminating token needs to be on a separate line without indenting (or indented with tabs only when using <<-).

Note that you can not put here documents in one liners. For such use cases, use a <<< here string:

cat << EOF  hello world  EOF   # Wrong: data and terminator can not be on the same line
cat <<< "hello world"          # Correct

Exceptions:

None

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