Le programme nut communique avec l'onduleur et déclenche l'arrêt du serveur “proprement” en cas de panne prolongée, avant la décharge complète des batteries.

aptitude install nut

/etc/default/nut

# start upsd
START_UPSD=yes

# set upsd specific options. use "man upsd" for more info
UPSD_OPTIONS=""

# start upsmon
START_UPSMON=yes

# set upsmon specific options. use "man upsmon" for more info
UPSMON_OPTIONS=""

/etc/nut/nut.conf

MODE=standalone

/etc/nut/ups.conf

[apc]
	driver = usbhid-ups
	port = /dev/usb/hiddev0 # ou /dev/bus/usb/001/004
	desc = "APC ES 550"

/etc/nut/upsd.conf

LISTEN  localhost 3493
ACL localhost 127.0.0.1/32
ACCEPT localhost

/etc/nut/upsd.users

[admin]
	password = adminpass
	actions = SET
	instcmds = ALL

[user]
	password = mypass
	allowfrom = localhost
	upsmon master

/etc/nut/upsmon.conf

MONITOR apc@localhost 1 user mypass master

MINSUPPLIES 1

FINALDELAY 5
HOSTSYNC 15
SHUTDOWNCMD "/sbin/shutdown -h +0"
POWERDOWNFLAG /etc/killpower

POLLFREQ 5
POLLFREQALERT 5
DEADTIME 15
NOCOMMWARNTIME 300
RBWARNTIME 43200

Il n'y a pas de fichier /etc/default/nut

/etc/nut/nut.conf

MODE=standalone

/etc/nut/upsd.conf

MAXAGE 15
LISTEN  127.0.0.1 3493
MAXCONN 1024

/etc/nut/upsd.users

[user]
        password = mypass
        upsmon master

/etc/nut/upsmon.conf

MONITOR apc@localhost 1 user mypass master

MINSUPPLIES 1

FINALDELAY 5
HOSTSYNC 15
SHUTDOWNCMD "/sbin/shutdown -h +0"
POWERDOWNFLAG /etc/killpower

POLLFREQ 5
POLLFREQALERT 5
DEADTIME 15
NOCOMMWARNTIME 300
RBWARNTIME 43200