awk

• sed is a similar program

• Sum up a list of numbers, 1 per line, outputting the list and the sum¹:

  <cmd> | awk '{ sum+=$1;print $1} END {print "Sum";print sum}'

Links:

• What does $0=$2 in awk do?, Kaushik Gopal (HN)

Footnotes

1. Linux: sum a column of numbers ↩