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Check that your CPU supports hardware virtualization

egrep -c '(vmx|svm)' /proc/cpuinfo <===> 0 it means that your CPU doesn't support hardware virtualization. / If 1 or more it does - but you still need to make sure that virtualization is enabled in the BIOS.

egrep -c ' lm ' /proc/cpuinfo <===> 0 is printed, it means that your CPU is not 64-bit/ If 1 or higher, it is. Note: lm stands for Long Mode which equates to a 64-bit CPU.

grep -o 'vmx\|svm' /proc/cpuinfo <===> testuje zda vase CPU muze pouzivat virtualizaci - nekolikrat vypise vmx /svm kolik ma CPU vlaken

## pokud se v techto vystupech neobevi nic nebo 0 - je potreba v biosu zapnout virtualizaci VT-d (Intel Virtualization Technology ENABLED) + Inteů VT for Directed I/O (VT-d) ENABLED

LC_ALL=C lscpu | grep Virtualization <===> napise VT-x

Install KVM / QEMU on Debian 11|10
!!!!!!!!!!!!TOTO NENI VYZKOUSENE!!!!!!!!!!!!

1) sudo apt -y install qemu-kvm libvirt-daemon bridge-utils virtinst libvirt-daemon-system

2) sudo modprobe vhost_net <===> Load and enable the vhost_net module

3) lsmod | grep vhost <===>

4) echo vhost_net | sudo tee -a /etc/modules

5) sudo apt -y install virt-top libguestfs-tools libosinfo-bin qemu-system virt-manager <===> install useful Virtual Machine management tools.

Install KVM / QEMU FROM TITUS

1) sudo apt-get install qemu qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils libguestfs-tools genisoimage virtinst libosinfo-bin virt-manager <===> nainstaluje vse potrebne

2) sudo adduser $USER libvirt <===> prida vas jako uzivatele do skupiny libvirt

3) sudo adduser $USER libvirt-qemu <===> prida vas jako uzivatele do skupiny libvirt-qemu

4) restart je doporuceny

5) spustit Virtual Machine Manager

6) objevi se nejspi se chyba "Unable to connect to libvirt qemu:///system" to je normalni

7) dame Soubor > Pridat spojeni > QEMU/KVM uzivatelska relace (user session) > pripojit (connect)

Install KVM / QEMU FROM K$K ROyal

1) nainstaluje vse potrebne
sudo apt-get install qemu qemu-kvm bridge-utils virt-manager

2) doporucuji restartovat
reboot

3) zjistime zda jsme ve skupine libvirt
groups

4) pridam uzivatele do skupiny
sudo useradd -g $USER libvirt
sudo useradd -g $USER libvirt-kvm

5) overim zda jede demon
sudo systemctl status libvirtd

6) nastavim aby se spostel demon i pri restartu
sudo systemctl enable libvirtd.service

7) spustim sluzbu
sudo systemctl start libvirtd.service

8) spustim managera v GUI
virt-manager

9) zde jsou umistena fyzicky virtualni stroje
/var/lib/libvirt/images

10) Soubor > Novy virtualni stroj

 You can create permanent DHCP leases by editing the default network with virsh net-edit default. As an example, here are my network settings for my 2 VMs (the lines starting with <host are what you're looking for):

<network>
 <name>default</name>
 <uuid>d836a341-605b-4ba8-a6ce-edfd7a756bc1</uuid>
 <forward mode='nat'>
 <nat>
 <port start='1024' end='65535'/>
 </nat>
 </forward>
 <bridge name='virbr0' stp='on' delay='0'/>
 <mac address='52:54:00:3d:52:bf'/>
 <ip address='192.168.122.1' netmask='255.255.255.0'>
 <dhcp>
 <range start='192.168.122.2' end='192.168.122.254'/>
 <host mac='52:54:00:b4:7e:ed' name='qemu-windows' ip='192.168.122.11'/>
 <host mac='52:54:00:46:d0:e8' name='qemu-mint' ip='192.168.122.12'/>
 </dhcp>
 </ip>
</network>

After making the desired changes, run virsh net-destroy default && virsh net-start default to restart the network (best done with no VMs running).