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awk 'NR==FNR{t=$1;sub($1 " ","",$0);a[t]=$0;next}{print a[$1] RS $0 RS}' 2.txt 1.txt

Or shorter:sort file | uniq -c

Without a loop:

$ cat testfile | sed -r 's/^([0-9]+)-/\1 /' | xargs printf "%04d %s %s %d %d\n"
0281 BUM-5M BUM-5M 0 0
0282 BUM-5M BUM-5M 0 0
0083 BUM-5M BUM-5M 0 0

Or (for our pedants):
...

This is a pure shell solution - should work in bash as well.


#!/usr/bin/env ksh

while read first rest
do
printf "%04d %s %s\n" ${first/-/ } "$rest"
done <data-file
exit

Hi

awk '{x=substr($0,1,index($0,"-")-1);y=substr($0,index($0,"-")+1);printf "%04d %s\n",x,y;}' file

Guru.