Mrthfx

I have a log file. For every line with a specific number, I want to sum the last number of those lines. To grep and cut is no problem but I don't know how to sum the numbers. I tried some solutions from StackExchange but didn't get them to work in my case.

This is what I have so far:

grep "30201" logfile.txt | cut -f6 -d "|"

30201 are the lines I'm looking for.

I want to sum the last numbers 650, 1389 and 945

The logfile.txt

Jan 09 2016|09:15:17|30201|1|SL02|650

Jan 09 2016|09:15:18|43097|1|SL01|945

Jan 09 2016|09:15:19|28774|2|SB03|1389

Jan 09 2016|09:16:21|00788|1|SL02|650

Jan 09 2016|09:17:25|03361|3|SL01|945

Jan 09 2016|09:17:33|08385|1|SL02|650

Jan 09 2016|09:18:43|10234|1|SL01|945

Jan 09 2016|09:21:55|00788|1|SL02|650

Jan 09 2016|09:24:43|03361|3|SB03|1389

Jan 09 2016|09:26:01|30201|1|SB03|1389

Jan 09 2016|09:26:21|28774|2|SL02|650

Jan 09 2016|09:26:25|00788|1|SL02|650

Jan 09 2016|09:27:21|28774|2|SL02|650

Jan 09 2016|09:29:32|30201|1|SL01|945

Jan 09 2016|09:30:12|34032|1|SB03|1389

Jan 09 2016|09:30:15|08767|3|SL02|650

You can take help from paste to serialize the numbers in a format suitable for bc to do the addition:

% grep "30201" logfile.txt | cut -f6 -d "|"

650

1389

945



% grep "30201" logfile.txt | cut -f6 -d "|" | paste -sd+

650+1389+945



% grep "30201" logfile.txt | cut -f6 -d "|" | paste -sd+ | bc

2984

If you have grep with PCRE, you can do it with grep alone using postive lookbehind:

% grep -Po '|30201|.*|Kd+' logfile.txt | cut -f6 -d "|" | paste -sd+ | bc

2984

With awk alone:

% awk -F'|' '$3 == 30201 {sum+=$NF}; END{print sum}' logfile.txt        

2984

• 
  -F'|' sets the field separator as |
  


• 
  $3 == 30201 {sum+=$NF} adds up the last field's values if the third field is 30201
  


• 
  END{print sum} prints the sum at the END
  

Bash solution.

#!/bin/bash

pa=0 ; s=0 ; 

while read a b ; do 

  if [ "$a" == "$pa" ] ; then 

    s=$(($s+$b)) ; 

   else 

    if [ "$pa" != 0 ] ; then 

      echo $pa $s ; 

    fi ; 

    pa=$a ; s=$b ; 

  fi ; 

done < <(cat j.txt | awk -F'|' '{printf("%s %sn",$3,$6)}' | sort -n) 

echo $pa $s

Init Previous A and SUM

Cut down the input to fields 3 and 6 and sort them by number

Loop as long as field 3 stays the same, add field 6 to the SUM

if field 3 changes but the Previous A is not 0, output the Previous A and the SUM and reinit Previous A to a and SUM to last field 6 read.

Output last Previous A and SUM.

Output of the given input:

00788 1950

03361 2334

08385 650

08767 650

10234 945

28774 2689

30201 2984

34032 1389

43097 945

There is nothing really wrong with your grep and cut command. You could make it more robust by using "|30201|" as the search pattern. The issue then is dealing with the output.

Using bash:

#!/bin/bash

# get the output as a bash array and add the elements

nums=( $(grep "|30201|" logfile.txt | cut -f6 -d "|") )

total=0



for i in ${!nums[@]}

    do

    total=$(($total+${nums[i]}))

    done

echo $total

One little tool I keep around I call sumcol

#!/bin/sh

# Icarus Sparry. Free for any use.

C=${1:?"missing required column number"}

shift

awk '{s+=$'"$C"'} END { print s }' "$@"

which adds up the whitespace delimited column you provide. Whilst I would write (as @heemayl does)

awk -F'|' '$3 == 30201 {s+=$6} END{ print s}' logfile.txt

for the OP's problem, he could use

grep "30201" logfile.txt | cut -f6 -d "|" | sumcol 1

or

grep "30201" logfile.txt | tr "| " " _" | sumcol 6