UNIX for Dummies Questions & Answers

#!/bin/sh
date=`date +%y%m%d -d"1 day ago"`
inbound_dir=/vis/logfiles/to_solmis
            cp `grep -il ST~856~ $inbound_dir/*$date*` /vis/sumit/in_ASN/
            echo 'SENDER,RECEIVER,DATE,TIME,ASNUMBER' > a.csv
            for i in /vis/sumit/in_ASN/*
            do
                 mkdir -p /vis/sumit/inboundasns.$date
                 cp `echo $i` /vis/sumit/inboundasns.$date 
                 tr -c '[A-Z] [0-9] [a-z] ~' '[ *]' <$i > b
                 awk -F "DTM~" '{print $1}' b > c
                 awk -F "~SH~" '{print $2}' c > d
                 awk -F "~" '{print $1","$2","$3","$4","$11}' d >> a.csv
            done

cat very_long_file.txt
awk very_long_file.txt

tr -c '[A-Z] [0-9] [a-z] ~' '[ *]' <$i > b

awk -F "DTM~" '{print $1}' b > c