-*- mode: outline; coding: utf-8; -*-

* Linux.

  $ dmesg
  $ lsusb
  $ lspci

** Graphics card.

glxinfo - details about OpenGL, the Xserver, and your graphics card
glxinfo | grep direct - do you have direct 3d rendering?
glxinfo | grep vendor - graphics card vendor
lspci | grep VGA - specific graphics card model
glxgears - a simple 3d benchmark, prints frame rate to the terminal
xrandr - supported display resolutions

** Audio.

lspci | grep Audio - audio controller
aplay --list-devices - more audio device information

** Software versions.
cat /etc/issue - current distribution and version
apt-cache showpkg packagename - packagename’s version and dependencies
uname -r - Linux kernel version
uname -a - all kernel details

** Networking.

lspci | grep Ethernet - Ethernet controllers
ifconfig - networking interfaces, IP addresses, and more

** Processor.

cat /proc/cpuinfo - all processors, clock speeds, flags, and more
cat /proc/loadavg - processor load average for the last 1, 5, and 15 minutes
top - press C key to sort processes by CPU usage

** Memory.

cat /proc/meminfo - amount of RAM and swap, and how much is being used for what
free -m - total, used, and free memory shown in MB
top - press M key to sort processes by memory usage

** Hard disks.

df -H - partitions, as well as their mount-points and usage in GB
sudo fdisk -l - all partitions, their device names, and positions on disk

** USB devices.

lsusb - USB buses and attached devices

** Even more.

lshal -m - monitor for hardware changes
lspci - all PCI devices
hwinfo --short (install from package hwinfo) - overview of all hardware, as well as more detailed info
lshw - another program for listing hardware
lshw -html | w3m -T text/html - lists hardware with HTML output in the w3m web browser
uptime - current time elapsed since last reboot, users, and load average

** Debian.

  $ sudo apt-get install lshw