@Gayathri Devi,
You can use the below script .
beeline -u "{connection-string}" -e "show tables" | grep $1
if [ $? -eq 0 ]
then
echo "table found"
else
echo "table not found"
fi
But the content in a file say checktable.sh and run the below steps
chmod +x checktable.sh
./checktable.sh {tablename to check}
Thanks,
Aditya