Bash Regular Expression Cheat Sheet



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5hjxodu (suhvvlrqv fkhdw vkhhw%dvlf pdwfklqj (dfk vpero pdwfkhv d vlqjoh fkdudfwhu dqwklqj =egljlw lq =%qrq gljlw =x´zrugµ ohwwhuv dqg gljlwv dqg b. A regular expression is a pattern consisting of a sequence of characters that matched against the text. UNIX evaluates text against the pattern to determine if the text and the pattern match. If they match, the expression is true and a command is executed. Some of the most powerful UNIX utilities, such as grep and sed, use regular expressions. Regular Expressions / Regex Cheat Sheet Special Characters in Regular Expressions & their meanings. Character Meaning Example. Match zero, one or more of the previous. W working directory V version, patchlevel of bash W basename of working directory # command number $ root as #, user as $! History number nn character code in octal backslash begin non-printing characters end non-printing characters: FREQUENTLY USED REGULAR EXPRESSIONS. 0-9+ worked for me on older BASH 3.2 as well so not sure why Ubuntu BASH is not liking it. – anubhava Feb 15 '17 at 15:22 Hmmm, never mind, I got confused: it's grep that doesn't handle + (at least not without additional options).

Regular Expressions Cheat Sheet

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Bash Regular Expression Cheat Sheet Answers

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