# 命令行语法说明怎么读

\$ man man

The following conventions apply to the SYNOPSIS section and can be used as a guide in other sections.

bold text type exactly as shown.
italic text replace with appropriate argument.
[-abc] any or all arguments within [ ] are optional.
-a|-b options delimited by | cannot be used together.
argument … argument is repeatable.
[expression] … entire expression within [ ] is repeatable.