Linux system monitoring and diagnostics

Command	Description
dmseg	Displays system messages and hardware logs
lm_sensors	Monitors sensor data, such as temps, fan speed, voltage
ipmitool	Remote management and diagnostics for server hardware

dmesg

This command stores data regarding the boot process, system errors, logs, etc. By default, the command prints everything in the system message buffer. However, we can search for specific data with a few flags, such as:

Flag	Description
-c	Clears buffer after displaying messages
-f	Filters message by facility (drivers, sec logs, etc.)
-l	Categorizes by severity
-e	shows timestamps
-H	Human readable

lm_sensors

lm_sensors is the name of a package that provides access to the sensors program that can be used to check sensor readings.

Note

The sensors command might not show all relevant information until a configuration is prepared; this can be done automatically with sensors-detect.

ipmitool

ipmitool is used for remote management of servers, using commands such as ipmitool sensors to get sensor data from a remote server.