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Смотри также (See also)
Section 1.4, Utility Description Defaults, ex(1p), sed(1p),
sh(1p), vi(1p)
The Base Definitions volume of POSIX.1‐2017, Table 5-1, Escape
Sequences and Associated Actions, Chapter 8, Environment
Variables, Section 9.3, Basic Regular Expressions, Chapter 11,
General Terminal Interface, Section 12.2, Utility Syntax
Guidelines
