follow a pathname until a terminal point is foundExample:
namei -l /var/mail/myuser
f: /var/mail/myuser dr-xr-xr-x root root / drwxr-xr-x root root var lrwxrwxrwx root root mail -> spool/mail drwxr-xr-x root root spool drwxrwxr-x root mail mail -rw-rw---- myuser mail myuser