BASE_PATH=/home/tmp
FILENAME=summary.txt==>3 files 
These are exist in current location and wait for 3rd file to arrive  

PASSIVELBS_xxx_1
PASSIVELBS_xxx_2

summary=`cat ${BASE_PATH}/${FILENAME}|wc -l`
check=`ls -l PASSIVELBS_xxx_*|wc -l`
while [ $summary != $check ];do 
echo "Summary files are $summary"
echo "Checksum files are $check"
echo "Files are not matching with checksum"
exit 1

Last login: Sun Mar 12 10:12:11 on ttys000
AMIGA:amiga~> cd Desktop/Text
AMIGA:amiga~/Desktop/Text> chmod 755 junk.txt
AMIGA:amiga~/Desktop/Text> cat junk.txt
BASE_PATH=/home/tmp
FILENAME=summary.txt==>3 files 
These are exist in current location and wait for 3rd file to arrive  

PASSIVELBS_xxx_1
PASSIVELBS_xxx_2

summary=`cat ${BASE_PATH}/${FILENAME}|wc -l`
check=`ls -l PASSIVELBS_xxx_*|wc -l`
while [ $summary != $check ];do 
echo "Summary files are $summary"
echo "Checksum files are $check"
echo "Files are not matching with checksum"
exit 1
AMIGA:amiga~/Desktop/Text> 
AMIGA:amiga~/Desktop/Text> 
AMIGA:amiga~/Desktop/Text> ./junk.txt
./junk.txt: line 2: files: command not found
./junk.txt: line 3: These: command not found
./junk.txt: line 5: PASSIVELBS_xxx_1: command not found
./junk.txt: line 6: PASSIVELBS_xxx_2: command not found
cat: /home/tmp/: No such file or directory
ls: PASSIVELBS_xxx_*: No such file or directory
./junk.txt: line 15: syntax error: unexpected end of file
AMIGA:amiga~/Desktop/Text> _