System commands files are stored in the following directories by default:
/bin
/sbin
/usr/bin
/usr/sbin
/usr/local/bin
/usr/local/sbin
All files in these directories should be owned by the root group,
or a system account.
If the directory, or any file in these directories, is found to be owned
by a group other than root or a a system account correct its ownership
with the following command:
$ sudo chgrp root FILE