hi there
i'm trying to delete blank lines and or lines with spaces only from a series of files in an directory.
to do so, i'm using this:

for files in `ls /users/myname/pesop* 2>/dev/null`
do
grep -v ^$ $files > newfile
mv newfile $files
done

now, this works great for blank lines but doesn't work for lines with spaces. The number of spaces is uncertain.
maybe it would be better with SED, but i dont know how to use it.
can anyone help me?
thanks