Search Results

To maintain the order of the records:
awk '{
if(!a[$1]){
b[c++]=$1
}
a[$1]+=$2
}
END{
for(i=0;i<c;i++)
print b[i] FS a[b[i]]
}' file

Use nawk or /usr/xpg4/bin/awk on...

awk '{a[$1]+=$2}END{for(i in a){print i, a[i]}}' file