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awk Tutorial

By Karunesh Johri • Updated: March 16, 2023

1.0 awk awk is a filter which takes the input and gives output after matching desired patterns and doing processing linked to matched patterns. awk is well suited for processing voluminous raw text data and producing statistical reports from it. awk is named after the first character of the names of its designers, Al Aho, …

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Tags: array, awk, filter, Linux, match, pattern, Unix

grep Command in Linux

By Karunesh Johri • Updated: February 20, 2023

1.0 grep grep is a program for searching a given string pattern in files. It searches the files for the pattern and prints the lines that contain strings matching the pattern. For example, $ # grep pattern filenames … $ grep ‘hbox’ find.c GtkWidget *window, *scrolled_win, *hbox, *vbox, *find; hbox = gtk_hbox_new (FALSE, 5); gtk_box_pack_start …

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Tags: command, file, filter, grep, Linux, match, pattern, regular expression, search, Unix