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Hi John,

Please see my earlier post, specifically:



I suggest you request that your Sysadmin "does the needful", because sudo will consume arguments passed and check whether they correspond...

'man 2 creat'

creat(2) operates on file descriptors as does the rest of the stdio.h calls - give the manpage a view.

-or-

you can OR the O_CREAT flag with O_RDWR in open(2) to create the...

You could test the return code from the grep

name="john"
age=25
file=txt
grep -x ${name}:${age} $file 2>&1 > /dev/null

if [ "$?" -eq "0" ]; then
echo "User exists"
fi

...

Check the perms on /dev/loop0


ls -l /dev/loop0

Yeah, I edited my post above.

You have to use double quotes for the command so the shell can expand the var ahead of time. Single quotes pass it literally.

You'll have to escape the double ""...