Regular Expressions

The Three Musketeers of Linux: Mastering Regular Expressions, AWK, and Sed

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The Three Musketeers of Linux: Mastering Regular Expressions, AWK, and Sed

Regular Expressions Basic regular expression ( ^, s, ., [], *) metacharacters Linux regular expressions are tools used for processing large amounts of strings, defining a set of rules and methods to match specific text patterns. Regular expressions consist of ordinary characters (such as letters a to z) and special characters (also known as metacharacters) … Read more

Understanding Grep Command in Linux

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Understanding Grep Command in Linux

In Linux, the grep command is used for text searching. Whether processing logs, filtering files, or finding specific strings in a code repository, grep can perform remarkably well. 1. Basic Syntax The basic format of the grep command is:<span>grep [options] 'search pattern' [file]</span>. For example, to search for the word “linux” in the <span>run.log</span> file, … Read more