![]() ![]() In this article, we have covered How to use logical operators (OR, AND & NOT) with Linux grep command. ![]() Linux grep command is awesome in pattern matching only if you know it very well. (5) AND operator implement using -E optionīelow commands print lines that match pattern1 and pattern2 grep -E ' (4) AND operator usage example in grep by using multiple patternsīelow commands print lines that matches pattern1, pattern 2 and pattern 3 cat | grep 'pattern1' | grep 'pattern2' | grep 'pattern3' (3) Use -v option for using the NOT operator in grepīelow commands print lines that not matches pattern1 cat | grep -v '' Evaluate the expression and use the filtration conditions to filter data. We will use the below data to demonstrate logical AND, OR, and NOT operators in grep:īelow commands print lines that match pattern1 or pattern2 till pattern n cat | grep '\|\|.'īelow commands print lines that match pattern1 or pattern2 till pattern n by using -E option cat | grep -E '||.' 94 THE R BOOK To find all the countries with two or more names, just search for a blank ' ': as.vector(Countrygrep(' ',as.character(Country))) 1 11. tags: R grep list.files basename dirname regex Sys.glob py unlink gsub. Click Here if you are interested in understanding Top Linux Commands for Beginners.Ĭlick Here if you are interested in Learning Linux Fundamentals Linux grep command comes for rescue, and you can use the logical operators' functionality of this command. Suppose you have logs of the firewall, and you want to search for specific IPs. Linux grep command is used to filter information based on pattern matching. This article will see How to use logical operators (OR, AND, NOT) with Linux grep command. ![]() Linux grep is one of the most used commands by system administrators, computer programmers and ethical hackers. ![]()
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