SC1069 – ShellCheck Wiki

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You need a space before the [.

Problematic code:

if[ -e file ]
then echo "exists"; fi

Correct code:

if [ -e file ]
then echo "exists"; fi

Rationale:

ShellCheck found a keyword immediately followed by a [. There needs to be a space between them.

Exceptions:

None

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