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1. awk 1.1 grammar awk [options] 'BEGIN {cmd1; cmd2; ...} {cmd1; cmd2; ...} END {cmd1; cmd2; ...}' input_file Execute the script specified after BEGIN keyword before reading data; (optional)Execute the script of the middle part for each line of text in the data flow;After processing all data, execute the script specified after the END keywo ...

preface Detailed explanation of awk variables, common built-in variables, user-defined variables, built-in variables NR, NF, FNR, RS, ORS, FILENAME, ARGC and ARGV awk variable "Variables" are divided into "built-in variables" and "custom variables". "Input separator FS" and "output separat ...

preface AWK is an interpretive programming language. For text processing, its first name comes from the last names of its three authors: Alfred Aho, Peter Weinberger and Brian Kernighan awk program structureRun awk file scriptawk basic syntaxBuilt in variables commonly used in awk program Pay attention to the official account and exchange wi ...