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dmesg <===> debugging messages from kernel
sudo dmesg | tail -20 <===> vypise poslednich 20 radku z tabulky

sudo lshw > /tmp/lshw.txt <===> makes txt file with list of hardware in /tmp
sudo lshw -html > /tmp/lshw.html <===> same as above in a nice html file
sudo lshw -class network <===> podrobny vypis sitovych prvku v pc

lspci <===> lists PCI devices, more elaborate with the -vv option
lspci -vnn | egrep -i "3d|display|vga" <===> podrobnosti o grafice

sudo scanpci <===> to scan PCI buses and report information about the configuration space settings for each PCI device.
sudo dmidecode <===> the computer's DMI (SMBIOS) table in readable format /**/ Desktop Management Interface (System Management BIOS)
sudo lsusb <===> lists USB devices, more elaborate with the -vv option
lshal <===> lists all devices with their properties, "lshal --monitor" monitors the changes

cat /proc/devices <===> list loaded hardware devices
cat /proc/dma <===> what dma channels are used
cat /proc/interrupts <===> what IRQs are used
cat /proc/ioports <===> what I/O are used
cat /proc/meminfo <===> info about memory use
cat /proc/modules <===> loaded kernel modules
cat /proc/cpuinfo <===> info about the processor
cat /proc/pci <===> plugged in PCI devices
cat /proc/scsi/scsi <===> SCSI devices
cat /proc/buddyinfo <===> check memory fragmentation
cat /proc/version

free -h -s 5 <===> vypisuje volnou RAM v prodlevach 5 sekund po sobe

glxinfo <===> vypise veskere info grafice
glxinfo -B <===> info o grafice jako je OpenGL, display: :0 screen: 0, dedicated video memory
xdpyinfo

iotop <===> sledování I/O operací procesů v reálném čase