Number of minutes that can elapse before B<sudo> will ask for a
passwd again. The default is C<@timeout@>. Set this to C<0> to always
prompt for a password.
+If set to a value less than C<0> the user's timestamp will never
+expire. This can be used to allow users to create or delete their
+own timestamps via C<sudo -v> and C<sudo -k> respectively.
=item passwd_timeout
The user B<jack> may run any command on the machines in the I<CSNETS> alias
(the networks C<128.138.243.0>, C<128.138.204.0>, and C<128.138.242.0>).
-Of those networks, only <128.138.204.0> has an explicit netmask (in
+Of those networks, only C<128.138.204.0> has an explicit netmask (in
CIDR notation) indicating it is a class C network. For the other
networks in I<CSNETS>, the local machine's netmask will be used
during matching.