gawk

all

GNU version of awk, a versatile programming language for working on files. See also: `awk`.

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Options (1)

-F, --field-separatorboolean

Print the last column of each line in a file, using a comma (instead of space) as a field separator

Example: gawk {{[-F|--field-separator]}} ',' '{print $NF}' {{path/to/file}}

Examples (8)

Print the fifth column (a.k.a. field) in a space-separated file

gawk '{print $5}' path/to/file

Print the second column of the lines containing "foo" in a space-separated file

gawk '/foo/ {print $2}' path/to/file

Print the last column of each line in a file, using a comma (instead of space) as a field separator

gawk [-F|--field-separator] ',' '{print $NF}' path/to/file

Sum the values in the first column of a file and print the total

gawk '{s+=$1} END {print s}' path/to/file

Print every third line starting from the first line

gawk 'NR%3==1' path/to/file

Print different values based on conditions

gawk '{if ($1 == "foo") print "Exact match foo"; else if ($1 ~ "bar") print "Partial match bar"; else print "Baz"}' path/to/file

Print all the lines which the 10th column value is between a min and a max

gawk '($10 >= min_value && $10 <= max_value)' path/to/file

Print table of users with UID >=1000 with header and formatted output, using colon as separator (`%-20s` mean: 20 left-align string characters, `%6s` means: 6 right-align string characters)

gawk 'BEGIN {FS=":";printf "%-20s %6s %25s\n", "Name", "UID", "Shell"} $4 >= 1000 {printf "%-20s %6d %25s\n", $1, $4, $7}' /etc/passwd

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