Programming VIP

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 ...