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a little correction about my writes

........
esac
echo "Do u want to continue ? "
read c
if [ $c != "y" ]
then
exit
fi
done
and i can not see the delete records(ID) from...

change these
.................................
.......................
read db
if [ -z "$db" ] ; then echo "DB name is empty!! " ; exit 1 ; fi
....................................

What happens if you manually execute that command?
Or, execute the command without the -v option? Without the -v option, the result would demonstrate what meets the criteria.

grep -v "stuff"...

Please show an example of how it is not working.
Not working at all, only partially, etc...

Hi Lina_14,

In read file1 and cat $file variables are different and program seems to hang because cat waits for input from keyboard. I had to remove it and the sixth option (6.Delete file) worked.