4/5/2023 0 Comments Grep or condition![]() ![]() ![]() In this example we will list players those do not 27 years old. NOT logic is used to get results those do not matched given pattern. $ grep "2 Years" manchester.txt | grep 27 AND with Multiple Grep NOT Logic $ grep "27.*2 Years" manchester.txt AND Logic AND with Multiple GrepĪnother implementation is using multiple grep commands to filter given patterns. In this example we will list players those contract is 2 years and age is 27. In this example we will list players those contract is 2 years and age is 27. $ egrep "23|30" manchester.txt OR with Egrep AND LogicĪND logic will match lines those have all provided patterns. We will use | operator again. In this example we will look players those age 23 OR 30. $ grep -E "23|30" manchester.txt OR with Extended Grep OR with EgrepĪnother tool used to implement OR logic is egrep. In this example we will look players those age 23 OR 30. If grep decides the file is a text file, it strips the CR characters from the original file contents (to make regular expressions with and work correctly). $ grep "23\|30" manchester.txt OR Logic OR with Extended GrepĪnother way to implement OR logic is using grep command extended option with -E. Notice how the use of -m flag affects the output of grep for the same set of conditions in the example below: grep It textfile.txt This is a sample text file. In this example we will look players those age 23 OR 30. Or logic matches all lines if one of the pattern match. This is the wage list of Manchester United Football Team. We will use following text during tutorial for grep operations. In this tutorial we will look grep command or, and, not logic operations in detail. We have all ready provided tutorial and examples about grep and egrep. -x Search only for lines where the search string matches the entire line.Lo grep is very useful tool for text search and pattern matching.In particular, the OR operator is used with multiple expressions to check for the specific condition and the expression satisfying the specific condition is selected for further proceedings. -v Invert the program - collect all lines that fail to match. The grep can be used with various operators, i.e., OR, AND, and NOT to fulfill the specific condition and then perform the operation.-i Match using a case-insensitive comparison.-l Output only the names of the files that contain at least one matching line. ![]() -n Prepend the line number and a colon (':') to each line in the output, placing the number after the filename (if present).The grep command supports the following flags: When searching in multiple files, each matching line is prepended by the file name and a colon (':'). It then reads the contents of the specified files (in the order specified), finds the lines that contain the search string, and finally returns those lines in the order in which they were found. Zero or more flags for customizing the command's behavior.Your task is to implement a simplified grep command, which supports searching for fixed strings. The Unix grep command searches files for lines that match a regular expression. grep -E '2330' manchester.txt OR with Extended Grep OR with Egrep Another tool used to implement OR logic is egrep. Search files for lines matching a search string and return all matching lines. OR Logic OR with Extended Grep Another way to implement OR logic is using grep command extended option with -E. ![]()
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