awk Command Examples
A versatile programming language for working on files. More information: https://github.com/onetrueawk/awk.
- Print the fifth column (a.k.a. field) in a space-separated file:
awk '{print $5}' {{path/to/file}}
- Print the second column of the lines containing "foo" in a space-separated file:
awk '/{{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:
awk -F ',' '{print $NF}' {{path/to/file}}
- Sum the values in the first column of a file and print the total:
awk '{s+=$1} END {print s}' {{path/to/file}}
- Print every third line starting from the first line:
awk 'NR%3==1' {{path/to/file}}
- Print 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/file}}
- Print 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