What is the use of string function sub(regex,replacement)?
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What is the use of string function index(string,search) in AWK?
What is the use of systime function?
What is the use of string function tolower(string)?
Write a command remove all empty lines?
Write a command to find the sum of bytes (size of file) of all files in a directory?
What are the Autoincrement and Autodecrement Operators?
What are AWK Built-in Variables?
What are Dynamic Variables?
What is the use of numeric function int ?
Write a command to print first and last line using sed command?
how to run awk command specified in a file?
What is the use of format specifier %d ?