Compose-Files/Backups/Miker/.trash/AWK Cheat-Sheet.md

Command	Description
awk '/pattern/ {print $1}'	standard Unix shells
awk '/pattern/ {print "$1"}'	compiled with DJGPP, Cygwin
awk "/pattern/ {print \"$1\"}"	GnuWin32, UnxUtils, Mingw
awk '1;{print ""}'	double space a file
awk 'BEGIN{ORS="\n\n"};1'	double space a file
awk 'NF{print $0 "\n"}'	double space a file which already has blank lines
awk '1;{print "\n"}'	triple space a file
awk '{print FNR "\t" $0}' files*	precede each line by its line number
awk '{print NR "\t" $0}' files*	precede each line by its line number for all files together
awk '{printf("%5d : %s\n", NR,$0)}'	number each line of a file
awk 'NF{$0=++a " :" $0};1'	number each line of a file, but only print numbers if line is not blank
awk 'END{print NR}'	count lines (emulates "wc -l")
awk '{s=0; for (i=1; i<=NF; i++) s=s+$i; print s}'	print the sums of the fields of every line
awk '{for (i=1; i<=NF; i++) s=s+$i}; END{print s}'	add all fields in all lines and print the sum
awk '{for (i=1; i<=NF; i++) if ($i < 0) $i = -$i; print }'	print every line after replacing each field with its absolute value
awk '{for (i=1; i<=NF; i++) $i = ($i < 0) ? -$i : $i; print }'	print every line after replacing each field with its absolute value
awk '{ total = total + NF }; END {print total}' file	print the total number of fields ("words") in all lines
awk '/Beth/{n++}; END {print n+0}' file	print the total number of lines that contain "Beth"
awk '$1 > max {max=$1; maxline=$0}; END{ print max, maxline}'	print the largest first field and the line that contains it
awk '{ print NF ":" $0 }'	print the number of fields in each line, followed by the line
awk '{ print $NF }'	print the last field of each line
awk '{ field = $NF }; END{ print field }'	print the last field of the last line
awk 'NF > 4'	print every line with more than 4 fields
awk '$NF > 4'	print every line where the value of the last field is > 4