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ShellCheck plugin for SonarQube

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In POSIX sh, &> is undefined.
(or "In dash, ... is not supported." when using dash)
Problematic code
#!/bin/sh
ssh host cmd &> log

Correct code
Use the long form instead of the shorthand:
#!/bin/sh
ssh host cmd > log 2>&1

Rationale
&> is a bash and ksh extension for redirecting both stdout and stderr. In dash and POSIX sh, use 2>&1 explicitly.
Exceptions
If you only intend to target shells that supports this feature, you can change
the shebang to a shell that guarantees support, or [[ignore]] this warning.
You can use # shellcheck disable=SC3000-SC4000 to ignore all such compatibility
warnings.
Related resources

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