Hay que instalar el demonio uptimed: aptitude install uptimed.
Se pueden configurar avisos por correo en /etc/uptimed.conf
Para ver la tabla de uptimes, ejecutar uprecords.
# Uptime | System Boot up
----------------------------+---------------------------------------------------
1 0 days, 00:17:47 | Linux 2.6.26-2-686 Fri Jan 15 16:03:49 2010
-> 2 0 days, 00:03:13 | Linux 2.6.26-2-686 Fri Jan 15 16:21:49 2010
----------------------------+---------------------------------------------------
no1 in 0 days, 00:14:35 | at Fri Jan 15 16:39:36 2010
----------------------------+---------------------------------------------------
1 0 days, 00:17:47 | Linux 2.6.26-2-686 Fri Jan 15 16:03:49 2010
-> 2 0 days, 00:03:13 | Linux 2.6.26-2-686 Fri Jan 15 16:21:49 2010
----------------------------+---------------------------------------------------
no1 in 0 days, 00:14:35 | at Fri Jan 15 16:39:36 2010