UNIX for Dummies Questions & Answers

kamaraj@kamaraj-laptop:~/Desktop/testing$ cat sample.txt
kamaraj 34
kamaraj 35
kamaraj 56
raj 32
raj 324
raj 93
raj 93
test 1
test 1
test 1
test 1
test 1
test 1
one 23
one 23
one 23
one 23
one 23
one 23
one 23

#/bin/sh -x
cat sample.txt | awk ' /./ {print $1}' | sort | uniq > output.txt

for i in `cat output.txt`;do 
    tot=0;
    num=`grep $i sample.txt|awk '{print$2}'`; 
        for j in $num;do 
            tot=`expr $j + $tot`;
        done;
    echo "$i --> $tot"; 
done

kamaraj@kamaraj-laptop:~/Desktop/testing$ ./sample.sh 
kamaraj --> 125
one --> 161
raj --> 667
test --> 6

awk '{_[$1]+=$2}END{for(i in _) print i" --> "_[i]}' infile

awk '{arr[$1]+=$2}

END{for(i in arr) print i" --> "_[i]}' infile