Shell Programming and Scripting

BIP in report_one_acnt> **SUCCESSFUL** BILL 25895519 ACCOUNT 7615

echo "BIP in report_one_acnt> **SUCCESSFUL** BILL 25895519 ACCOUNT 7615" |\
sed 's/^.*BILL //; s/ ACCOUNT.*$//'

# catch the result in a variable
var="$( echo "BIP in report_one_acnt> **SUCCESSFUL** BILL 25895519 ACCOUNT 7615" |\
        sed 's/^.*BILL //; s/ ACCOUNT.*$//' \
      )

# test if "$var" contains only digits:
if [ -n "$(echo "$var" | sed 's/[0-9]//g)" ] ; then
     echo "$var is not a number"
else
     echo "$var is a number"
fi

 
$ cat test11
BIP in report_one_acnt> **SUCCESSFUL** BILL 25895519 ACCOUNT 7615

$ awk '{print$6}' test11
25895519
$

BILL_REF=`grep "**SUCCESSFUL**" bip.txt | cut -d " " -f 6`