hardware sensors monitor
sensorsd utility retrieves sensor
monitoring data like fan speed, temperature, voltage and RAID logical disk
status from the sysctl(2) hw.sensors subtree. When the state of
any monitored sensor changes, an alert is triggered. Every alert logs a
message to syslog(3) using the
Optionally, an alert can be configured to execute a command.
sensorsd monitors status
changes on all sensors that keep their state, thus sensors that
automatically provide status do not require any additional configuration. In
addition, for every sensor, no matter whether it automatically provides its
state or not, custom low and high limits may be set, so that a local notion
of sensor status can be computed by
indicating whether the sensor is within or is exceeding its limits.
Limit and command values for a particular sensor may be specified
in the sensorsd.conf(5) configuration file. This file is reloaded
The options are as follows:
- Check sensors every check seconds. The default is 20. The state of a sensor is not yet regarded as changed when a check returns a new state for the first time, but only when the two subsequent checks both confirm the new state.
- Do not daemonize. If this option is specified,
sensorsdwill run in the foreground.
- Read configuration from file instead of the default configuration file /etc/sensorsd.conf.
- Configuration file for
sysctl(2), sensorsd.conf(5), syslog.conf(5), sysctl(8)
sensorsd program first appeared in
Certain sensors may erratically flip status from time to time. To
guard against false reports,
sensorsd requires two
confirmations before reporting a state change. However, this inevitably
introduces an additional delay in status reporting and command execution,
e.g. one may notice that
sensorsd makes its initial
report about the state of monitored sensors not immediately, but by default
about 60 seconds after it is started.