" I also observed which i couldn't redirect STDERR with no also redirecting STDOUT. The answer exactly where programA sends STDOUT to STDIN of programB, then redirects STDERR to the log file: programA 2> /var/log/programA.log and chose to use /boot/grub2/ as their GRUB prefix as opposed to the de-facto /boot/grub/ https://zbigniewj889sol5.wikipublicity.com/user