Linux has several tools to get computer information from Terminal, including over SSH. Here are some useful examples.
General computer info is obtained by:
dmidecode gives useful computer information from the Linux terminal, including over SSH.
dmidecode can help in remote asset tracking and verification of Linux computers.
- selects type of
man dmidecodefor more categories 0-255.
- Motherboard model # and serial #:
dmidecode -t 2
- BIOS version:
dmidecode -t 0
- CPU capabilities:
dmidecode -t 4
- CPU cache memory:
dmidecode -t 7
- RAM capability (maximum RAM):
dmidecode -t 16
- RAM installed:
dmidecode -t 17
To determine CPU speed on Linux use
powertop and tab over to
frequency stats to see percent of time overall CPU and each core is in a particular speed and state.
Getting point measurements isn’t as useful to me as modern CPUs are constantly switching state.
For BSD, get reports of CPU temperature and current speed with
Storage info is revealed by
lsblk gives a tree view of connected storage, including: hard drives, SD cards, DVD/CD, USB drives, etc.
This includes drives that are not mounted.
writing an SD card to setup a Raspberry Pi
gives hard drive device names like
lsblk on Linux.
/dev/ada0 is a common BSD HDD name.
To control HDD spindown time,
ataidle -I 30 /dev/ada0
-I 30 sets spindown time (after HDD unused this many minutes, spindown, here 30 minutes)
Get USB device name and hexadecimal Device Vendor and Product ID for connected devices.
This information does not rely on having a working USB driver, so if I’m troubleshooting why a USB device isn’t working in Linux, I issue before and after connecting
and visually look for a new device to appear.
If the new device doesn’t appear, this could mean
- the device requires an external (non-USB) source of power
- the device cable/jack is broken
- the device itself is broken
- the computer/hub USB port is broken
You’ll see lots of devices, even if no USB devices are visibly plugged into your computer. That’s because modern laptops have things like keyboards, touchpads, cameras, soundcards, SD Card readers, etc. internally connected via USB.
- tree view of connected USB devices
- detailed listing of all USB devices
To see if a controller or devices is USB 3.0, try
lsusb -v | grep xHCI
The USBview program gives a detailed GUI USB device tree view for Linux and Windows.
Shows basic status for WiFi:
iwconfig iw dev wlan0 station dump
gives more advanced information.
wlan0 is the Wifi card interface name
Typically, wireless cards including Wifi are on the PCI bus.
Unless of course you have a USB WiFi adapter.
The wireless/WiFi chipsets can typically be identified by
lspci | grep -i wireless
Linux peripherals on serial ports are readily examined.