How do I use awk pattern scanning and processing language under bash scripts? Can you provide a few examples? Awk is an excellent tool for building UNIX/Linux shell scripts. AWK is a programming language that is designed for processing text-based data, either in files or data streams, or using shell pipes. In other words you [...]

need to count one character at a time from input.txt. How do I read one character at a time under Linux / UNIX bash shell script? The read builtin can read one character at a time and syntax is as follows:   read -n 1 c echo $c   You can setup the while loop as [...]