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Info Catalog
(bash.info) Escape Character
(bash.info) Quoting
(bash.info) Double Quotes
3.1.2.2 Single Quotes ..................... Enclosing characters in single quotes (`'') preserves the literal value of each character within the quotes. A single quote may not occur between single quotes, even when preceded by a backslash.
Info Catalog
(bash.info) Escape Character
(bash.info) Quoting
(bash.info) Double Quotes