**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\\