gawk Command

gawk is a command-line tool for text processing in Linux and UNIX-like operating systems. It is a powerful tool for manipulating and analyzing text data, and it is especially useful for working with structured text data, such as data in a CSV or tab-delimited format.

Here are a few examples of how to use gawk:

Print the first field of each line in a file:

gawk '{print $1}' file.txt

Print the second and third fields of each line, separated by a comma:

gawk '{print $2, $3}' file.txt

Print the number of fields in each line:

gawk '{print NF}' file.txt

Print the sum of the first field of each line:

gawk '{sum+=$1} END {print sum}' file.txt

Replace all instances of “old” with “new” in the file:

gawk '{gsub(/old/, "new"); print}' file.txt

Count the number of lines in a file:

gawk 'END {print NR}' file.txt

These are just a few examples of the many things you can do with gawk. You can also use gawk to perform more complex text processing tasks, such as filtering and transforming data, and you can even write your own scripts to perform custom text processing tasks.

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