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(sh-utils.info)Conditions

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Enter node , (file) or (file)node

Conditions
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   This section describes commands that are primarily useful for their
exit status, rather than their output.  Thus, they are often used as the
condition of shell `if' statements, or as the last command in a
pipeline.

false invocation

Do nothing, unsuccessfully.

true invocation

Do nothing, successfully.

test invocation

Check file types and compare values.

expr invocation

Evaluate expressions.