$is not used specially and should therefore be escaped.
$ is special in double quotes, but there are some cases where it's interpreted literally:
"foo$") or before some constructs (
To avoid relying on strange and shell-specific behavior, any
$ intended to be literal should be escaped with a backslash.
Removed in v0.3.3 - 2014-05-29
ShellCheck is a static analysis tool for shell scripts. This page is part of its documentation.