awk
A versatile programming language for working on files. Note: Different implementations of AWK often make this a symlink of their binary. See also: `gawk`.
More info →Examples (8)
Print the fifth column (a.k.a. field) in a space-separated file
awk '{print $5}' path/to/filePrint the second column of the lines containing "foo" in a space-separated file
awk '/foo/ {print $2}' path/to/filePrint the last column of each line in a file, using a comma (instead of space) as a field separator
awk -F ',' '{print $NF}' path/to/fileSum the values in the first column of a file and print the total
awk '{s+=$1} END {print s}' path/to/filePrint every third line starting from the first line
awk 'NR%3==1' path/to/filePrint different values based on conditions
awk '{if ($1 == "foo") print "Exact match foo"; else if ($1 ~ "bar") print "Partial match bar"; else print "Baz"}' path/to/filePrint all the lines which the 10th column value is between a min and a max
awk '($10 >= min_value && $10 <= max_value)'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)
awk 'BEGIN {FS=":";printf "%-20s %6s %25s\n", "Name", "UID", "Shell"} $4 >= 1000 {printf "%-20s %6d %25s\n", $1, $4, $7}' /etc/passwd