Useful Notes – Ubuntu/Ubuntu Studio 22.04 LTS “Jammy Jellyfish”

I use Ubuntu Studio 22.04 LTS “Jammy Jellyfish” because comes with many-many preinstalled Apps.

Main Things to do after installing Ubuntu Studio 22.04 LTS “Jammy Jellyfish”
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I have chosen Ubuntu Studio 22.04 LTS because I do Graphic and Video Editing along with my main Programming work…
[Support: Ubuntu Studio 22.04 LTS (Jammy Jellyfish) will be supported for 3-years until April 2025.]
[Note: Ubuntu 22.04 LTS is supported for 5-years.] 
[Direct upgrades to Ubuntu Studio 22.04 from supported versions prior to 21.10 are not supported.]

Main Things To Do:

  1. Get your system ready with updates and repositories. Get familiar with auto-updates [Software & Updates, Software Center]
    sudo apt update && sudo apt upgrade
  2. Install applications of your choice from the software center, mainly Programming IDEs/Editors, because Content Creation Apps are come preinstalled already in Ubuntu Studio.  
    https://linuxconfig.org/things-to-install-on-ubuntu-20-04 
    [ COMPLETE GUIDE FOR MANY-MANY SOFTWARE Apps INSTALLATION ]
  3. Give your Ubuntu OS a different color [ Settings > Appearance ]
  4. Get familiar with the new screenshot tool. [ When you press the Print Screen button to take the screenshot, it opens the UI and gives you the option to take the screenshot of the selected area, entire screen, or current application window. ]
  5. Know about cleaning your system. The classic apt autoremove command is a good way to remove packages that are not required anymore. https://linuxhint.com/why_apt_get_clean/
    sudo apt autoremove
  6. Master the keyboard shortcuts
    Ctrl + Alt + T: Ubuntu terminal shortcut [instead of opening a terminal use Alt+F2 to run the console]
    Ctrl + Q: Close an application window
    Alt + Tab: Switch between running applications
    Super[Win] + Space: Change input keyboard e.g. En <->Ru
    Ctrl + Alt + arrow: Move between workspaces
    Ctrl + Alt + Del: Log out
    Go to Settings->Devices->Keyboard [for Custom Keyboard Shortcuts]
  7. OTHER SPECIAL THINGS OF INTEREST SEE BELOW

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Other Special Things you will do, if you want it, by REFERENCES ONLINE:  
========
1-DUAL BOOT WINDOWS-LINUX   
https://www.freecodecamp.org/news/how-to-dual-boot-any-linux-distribution-with-windows/
2-UBUNTU AS VIRTUAL MACHINE IN VMWARE HYPERVISOR  
https://www.linuxvmimages.com/images/ubuntustudio-2204/
https://linuxconfig.org/install-vmware-tools-on-ubuntu-22-04-jammy-jellyfish-linux
3-HOW TO INSTALL STEAM ON UBUNTU 22.04 FOR GAMING ON LINUX   
https://linuxconfig.org/how-to-install-steam-on-ubuntu-16-04-xenial-xerus
4-DO NOT DISTURB MODE UBUNTU    
https://ur9r.com/how-to-use-do-not-disturb-mode-in-ubuntu-so-you-can-focus-on-your-work/  
5-INSTALLING DESKTOP ENVIRONMENTS  
https://linuxconfig.org/how-to-install-ubuntu-studio-desktop-environment-on-ubuntu-20-04
https://linuxconfig.org/ubuntu-20-04-cinnamon-desktop-installation
6-1-KEYBOARD SHORTCUTS   
https://help.ubuntu.com/stable/ubuntu-help/shell-keyboard-shortcuts.html.en
6-2-SET KEYBOARD SHORTCUTS   
https://help.ubuntu.com/stable/ubuntu-help/keyboard-shortcuts-set.html.en
6-3-SCREENCAST & SCREENSHOTS KEYBOARD SHORTCUTS   
https://help.ubuntu.com/stable/ubuntu-help/screen-shot-record.html

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I major/critical advice from the Source of
========
Ubuntu & Ubuntu Studio – Linux: www.ubuntustudio.org for current-old users of Ubuntu Studio 20.04, about the upgrade to all new Ubuntu Studio 22.04 LTS, NOT TO DO SO… BUT DO INSTEAD A CLEAN INSTALL OF 22.04!!!
https://ubuntustudio.org/2022/04/ubuntu-studio-22-04-lts-released/ >>>>

Upgrading

Since it’s just out, you may experience some issues, so you might want to wait a bit before upgrading.

Due to the change in the desktop environment that started after the release of 20.04 LTS, direct upgrades from 20.04 LTS are not supported and may only be attempted at-your-own-risk. As with any system-critical operation, back-up your data before attempting any upgrade. The safest upgrade path is a backup of your /home directory and a clean install.

We have had anecdotal reports of successful upgrades from 20.04 LTS (Xfce desktop) to later releases (Plasma desktop), but this will remain at your own risk, and it is highly recommended to wait until 22.04.1 is released in August before attempting such an upgrade.

Instructions for upgrading are included in the release notes.

========

Personally, I did a clean install of Ubuntu Studio 22.04 in VMware Workstation Pro 15 – and would recommend it because this allows you to clean up and start fresh with Ubuntu Studio 22.04 LTS with a new set of applications and a new desktop environment.

LSE

Docker[Containers] vs Hypervisor[Virtual Machines]

Virtualization Technologies

Docker vs Hypervisor — Containers vs Virtual Machines

Wednesday, April 21, 2021

Category \ TechnologyDocker [Containers]Hypervisor [Virtual Machines]
Docker vs. Virtual Machines  
OS Support and ArchitectureNo Guest OS, Docker containers hosted on a single physical server with a host OS, which shares among them. Sharing the host OS between containers makes them light and increases the boot time. Docker containers are considered suitable to run multiple applications over a single OS kernel.Host OS and the Guest OS inside each VM. Guest OS can be any OS, like Linux or Windows, irrespective of host OS.
   
SecurityProviding root access to applications and running them with administrative premises is not recommended in the case of Docker containers because containers share the host kernel. The container technology has access to the kernel subsystems; as a result, a single infected application can hack the entire host system.Virtual machines are stand-alone with their kernel and security features. Applications needing more privileges and security run on virtual machines. 
   
PortabilityDocker containers packages are self-contained and can run applications in any environment, and since they do not need a guest OS, they can be easily ported across different platforms. Also, containers being lightweight [MBs] can be started and stopped in very less time compared to virtual machinesVMs are huge in size [GBs] because each include standalone OS. Not easy moved to a different platform without incurring compatibility issues.
   
   
     
Category \ TechnologyDocker [Containers]Hypervisor [Virtual Machines]
Docker vs. Virtual Machines  
PerformanceThe lightweight architecture of Docker containers is less resource-intensive than virtual machines. Most times one application per Container.VMs are more resource-intensive than Docker containers as the virtual machines need to load the entire OS to start. One OS in each VM, and usually many apps running in this OS.
   
Boot-TimeBoots in a few seconds.It takes a few minutes for VMs to boot.
   
Runs onDockers make use of the execution engine.VMs make use of the hypervisor.
   
Memory EfficiencyNo space is needed to virtualize, hence less memory.Requires entire OS to be loaded before starting the surface, so less efficient, more memory.
   
IsolationProne to adversities as no provisions for isolation systems.Interference possibility is minimum because of the efficient isolation mechanism.
   
DeploymentDeploying is easy as only a single image, containerized can be used across all platforms.Deployment is comparatively lengthy as separate instances are responsible for execution
   
UsageDocker has a complex usage mechanism consisting of both third party and docker managed tools.Tools are easy to use and simpler to work with.
   
Reuse of Resources and LibrariesDocker Containers can reuse Resources and Libraries from other Containers, taking less disk space.No reuse between VMs, Redundant copies exist, demanding more disk space.

Usually, Organizations are making use of the hybrid approach mostly as the choice between virtual machines and Docker containers depends upon the kind of workload offered.

Hypervisor-2 vs Docker

Hypervisor-1 vs Docker

Docker

Hypervisor-2 vs Hypervisor-1

Note: Hypervisor 1 [Servers mainly] vs Hypervisor 2 [Desktop mainly]

VM Hypervisor-2 vs Docker [Linux] vs Docker [VM Linux]