# PLEASE READ AN IMPORTANT MESSAGE FROM OUR FOUNDER # If you leave out the filename, UNIX will collect data from the standard input device. For example, an asterisk is treated as a wildcard when you don't use quotes. The UNIX shell does not interpret dollar signs, brackets, parentheses, pipes or asterisks in the same way as letters. If it contains multiple words or special characters, be sure to place single quotation marks before and after the pattern. The syntax for this UNIX command includes three parameters, but only the text pattern is required: Grep also has the ability to count instances of a search phrase that appear in a file. You can broaden the results by using wildcards. It returns a list of the matching words or shows each line of text that contains them. The UNIX Grep command searches files for a user-specified text pattern. 10 UNIX Grep Command Examples of How to Search a File for a Pattern
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