UNIX for Dummies Questions & Answers

blue  0
red    0
yellow  0
green  0
orange  0
blue  2
 red  2 
 yellow  2
 green  2
 orange  2
blue  4
 red  4
 yellow  4
 green  4
 orange  4
blue  6
 red  6
 yellow  6
 green  6
 orange  6

awk '{a[NR]=$1}END{for(i=0;i<=6;i+=2){for(j=1;j<=NR;j++){print a[j],i}}}' infile

blue  0
red    0
yellow  0
green  0
orange  0

# for i in 0 2 4 6; do sed "s/$/$i/" infile; done
blue  0
red 0
yellow 0
green 0
orange0
blue  2
red 2
yellow 2
green 2
orange2
blue  4
red 4
yellow 4
green 4
orange4
blue  6
red 6
yellow 6
green 6
orange6

# cat infile
blue
red
yellow
green
orange

awk -v n=10 'BEGIN {
  split("blue red yellow green orange", a)
  c=0
  for(i=1;i<=n;i++) {
    for(j=1;j<=5;j++){
      print a[j], c
    }
    c+=2
  }
}'

blue .5  8.9 0
red   9.3  4.2 0
yellow  2.0 9.1  0
green  7.3  1.8 0
orange  4.3  2.1  0

awk '{a[NR]=$1" "$2" "$3}END{for(i=0;i<=6;i+=2){for(j=1;j<=NR;j++){print a[j],i}}}' infile