Latest Qemu Installation in Debian Bullseye – Step-by-step

Installing

2. 2. Pre-Installation Checks

   Then Check KVM Virtualization is available
   With:

   egrep -c '(vmx|svm)' /proc/cpuinfo

   If in Output > 0 then your Processor support Hardware Virtualization!
   (But on a PC you may have still to enable it on BIOS…)Now again, Install the needed Tool:

   sudo apt install cpu-checker

   And then Verify it:

   kvm-ok

   If it’s Good you will see:

   INFO: /dev/kvm exists
   KVM acceleration can be used
   

   Finally, if the answer is negative you can still use KVM but only in a Slow mode…

3. 3. Installing Dependencies

   Then to Install Required Software
   So the Required Packages:

   sudo apt install python3-pip ninja-build git libglib2.0-dev libfdt-dev libpixman-1-dev zlib1g-dev flex bison

   Moreover, the Recommended ones:

   sudo apt install git-email libaio-dev libbluetooth-dev libcapstone-dev libbrlapi-dev libbz2-dev libcap-ng-dev libcurl4-gnutls-dev libgtk-3-dev libibverbs-dev libjpeg*-dev libncurses5-dev libnuma-dev librbd-dev librdmacm-dev libsasl2-dev libsdl2-dev libseccomp-dev libsnappy-dev libssh-dev libvde-dev libvdeplug-dev libvte-2.91-dev libxen-dev liblzo2-dev valgrind xfslibs-dev

4. 4. Downloading QEMU

   Download QEMU for Debian GNU/Linux:

   QEMU tar.xz Archive

   Downloading QEMU Source Code for Debian.

5. 5. Extracting QEMU Archive

   Then Extract QEMU into /tmp Directory
   If it does Not Open automatically then Double-Click on File Manager

   
   Or from Command Line:

   tar xvf ~/Downloads/qemu*.tar.xz -C /tmp/

   (But if downloaded with Firefox it may be instead into /tmp/mozilla*)
   Finally, if yuo are in Trouble to Find Out it on Terminal See: How to Access Downloads Folder from Browser.

6. 6. Installing QEMU

   Then to Install QEMU on Debian
   First, access the Download location by default with:

   cd ~/Downloads/quemu*/

   But if you are in Trouble to Find it out on Terminal then See: How to Access Downloads Folder from Browser.
   And then to Configure it play:

   ./configure

   Next, to Make it:

   make

   Or to do it Quicker using your full Computing power:

   make -j $(nproc)

   Now take a very Long Brake and just leave it achieving the 10000 Steps… :)
   Finally, to Setup it just run:

   sudo make install

   

   Congratulations, you are Done! :)