Superhero Ninja

Category: Ubuntu

  • Ubuntu 24.04 appimages require fuse to run

    appimages require fuse to run

    That is the fault I got when I tried running an appimage.

    Solution:

    sudo apt install libfuse2t64

    Tip

    Make sure to add exec to your appimage

    chmod a+x yourfile.appimage

  • Linux command line task management with jobs, BG, FG and nohup – multitasking

    Often I see people waiting while their command is executing, impatiently tapping their desk until a file copy or command has finished.

    They are often amazed when I show them that the Linux command line has a way of sending pending commands to the background, so you can continue on another task.

    Below is a gif screencast which shows:

    (more…)

  • Run a quick interactive shell in kubernetes for testing purposes

    Today I wanted to check some stuff on a pod running in my local kubernetes cluster. I’m still getting used to Kubernetes, thus didn’t want something ugly like exposing that pod.

    The easiest way of doing it for me has been to spin up a temporary pod using Ubuntu;

    kubectl run myshell --rm -i --tty --image ubuntu -- /bin/bash

    Now you can do whatever you want in the pod and when you log out of myshell, it’ll be removed immediately and we’re back to square one! <3

  • Citrix Workspace (ICAClient) no sound/audio in Microsoft Teams

    Since last week I am working with a virtual desktop (VDI) through Citrix Workspace (ICAClient) and noticed I can not use Teams to call or join meetings.

    This message is displayed in Microsoft Teams:

    There’s a problem with your connection.
    Still connecting to remote devices. Calling isn’t available yet.

    Cause: HDX Optimized audio does not work

    If you want to skip straigt to the solution, click here: Solution: Change MSTeamsRedirSupport to zero

    How to diagnose if the cause is the same as what I encountered

    Log in to your VDI, play some sounds AND talk into your microphone to make sure your audio is actually working. Check this via the sound mixer, that’ll show a moving bar if it’s receiving sound by your microphone. Speakers should work when you watch a random youtube movie.

    Next; Open MS Teams and click the “Three dots” settings menu, choose About, then Version. When your Workspace and Teams are expecting HDX to work but it didn’t, you will see this message: Citrix HDX Not Connected

    MS Teams, Settings – About – Version: “Citrix HDX Not Connected”

    Note: If it would be working, you would have seen Citrix HDX Connected

    The third option is if Teams does not expect Citrix HDX to work, then it simply doesn’t show anything about Citrix HDX and tunnels sound over the regular sound channels. This is what we want to accomplish in the next chapter.

    There is a registry entry MSTeamsReditSupport, which is set every time you connect to your VDI with Citrix Workspace. From what I understand; Citrix Workspace communicates to your VDI that it is capable to receive HDX optimized audio streams. Next to that MS Teams checks that registry setting when it is started to use/not use HDX optimized audio.

    Solution: Change MSTeamsRedirSupport to zero

    Change MSTeamsRedirSupport to 0 (zero) in registry. The exact location of this registry entry is here:
    HKEY_CURRENT_USER\SOFTWARE\Citrix\HDXMediaStream\MSTeamsRedirSupport

    It’s a bit tedious to open Registry Editor every time, so you can also create a registry entry file MSTeamsRedir.reg
    In this file you can paste this content:

    Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\SOFTWARE\Citrix\HDXMediaStream]
"MSTeamsRedirSupport"=dword:00000000

    Remember; You should run MSTeamsRedir.reg every time you connect to the machine or when you restart MS Teams.

    Why is this a problem?

    I do not know exactly, but I know that the HDX optimized socket on my laptop can not be reached contact the VDI and I tried searching for a solution for a couple of hours. I then became fed up with HDX optimized sockets and thought about buying a macbook to just make the damn thing work. After that short existential crisis I kept searching for a possible solution and was happy to find this registry setting.

    My emotions with Linux after figuring stupid things out which simply work on other OS’s

    What I’ve tried and did not work:

    1.) Run Citrix supplied hdxcheck.sh and see if you have all the libs installed, I tried installing all libs manually and in the end still had no HDX optimized sound in my VDI. You can run this command via the following path:
    /opt/Citrix/ICAClient/util/hdxcheck.sh

    2.) Install older version of Citrix Workspace, which didn’t use the HDX optimization and thus sound worked in all applications. I did encounter some bugs with full-screen not working properly on a bigger monitor. The version I used is linked below:
    Download icaclient_19.12.0.19_amd64.deb via https://www.citrix.com/downloads/workspace-app/
    Direct link to the download: https://www.citrix.com/downloads/workspace-app/legacy-workspace-app-for-linux/workspace-app-for-linux-1912.html

    Sources:

    Citrix.com: Enable optimization of Microsoft Teams

    Citrix.com: How to collect Logs for Citrix Workspace app for Linux?

  • Pop!_Os: NVidia gpu card very slow (or not working) Linux

    So after a long while I wanted to get back to CS:GO on my Thinkpad X1 Extreme with hybrid Intel/Nvidia GPU, and the performance was horrible!

    Long story short: (re)install the Nvidia drivers to get the Nvidia card working.

    First: Testing if the NVidia card is active

    You can test if you are actually using the NVidia card by running this command:

     ~  glxinfo|egrep "OpenGL vendor|OpenGL renderer"
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) UHD Graphics 630 (Coffeelake 3x8 GT2) 
 ~ 

    You can see in the example above that Intel means that you’re still using the Intel onboard graphics card for all your OpenGL stuff (including games like CS:GO)

    And Intel GPU is not good for gaming.

    Note: If it actually says NVIDIA in your output then don’t continue with the solution below.

    Solution: (Re-)Install the NVidia driver

    Check if you have the driver currently installed:

    dpkg -l |grep nvidia

    Notice: If the package is installed on your system then the package name is preceded by ii

    There should be driver package named nvidia-driver-xxx installed. Where xxx is the version number.

    In my system it looks like this:

    ~  dpkg -l |grep nvidia                         
ii  libnvidia-cfg1-470:amd64                470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA binary OpenGL/GLX configuration library
ii  libnvidia-common-470                    470.57.02-1pop0~1627044105~21.04~f9815ed                             all          Shared files used by the NVIDIA libraries
rc  libnvidia-compute-435:amd64             440.31-1pop1~1573485407~19.04~af08493                                amd64        Transitional package for libnvidia-compute-440
rc  libnvidia-compute-455:amd64             460.67-1pop0~1616430777~20.04~71e1ad1                                amd64        Transitional package for libnvidia-compute-460
rc  libnvidia-compute-460:amd64             465.31-1pop0~1623777959~20.10~a3ca7f3                                amd64        Transitional package for libnvidia-compute-465
rc  libnvidia-compute-465:amd64             470.57.02-1pop0~1627044105~20.10~f9815ed                             amd64        Transitional package for libnvidia-compute-470
ii  libnvidia-compute-470:amd64             470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA libcompute package
ii  libnvidia-compute-470:i386              470.57.02-1pop0~1627044105~21.04~f9815ed                             i386         NVIDIA libcompute package
ii  libnvidia-decode-470:amd64              470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA Video Decoding runtime libraries
ii  libnvidia-decode-470:i386               470.57.02-1pop0~1627044105~21.04~f9815ed                             i386         NVIDIA Video Decoding runtime libraries
ii  libnvidia-encode-470:amd64              470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVENC Video Encoding runtime library
ii  libnvidia-encode-470:i386               470.57.02-1pop0~1627044105~21.04~f9815ed                             i386         NVENC Video Encoding runtime library
ii  libnvidia-extra-470:amd64               470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        Extra libraries for the NVIDIA driver
ii  libnvidia-fbc1-470:amd64                470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA OpenGL-based Framebuffer Capture runtime library
ii  libnvidia-fbc1-470:i386                 470.57.02-1pop0~1627044105~21.04~f9815ed                             i386         NVIDIA OpenGL-based Framebuffer Capture runtime library
ii  libnvidia-gl-440:i386                   470.57.02-1pop0~1627044105~21.04~f9815ed                             i386         Transitional package for libnvidia-gl-470
ii  libnvidia-gl-470:amd64                  470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii  libnvidia-gl-470:i386                   470.57.02-1pop0~1627044105~21.04~f9815ed                             i386         NVIDIA OpenGL/GLX/EGL/GLES GLVND libraries and Vulkan ICD
ii  libnvidia-ifr1-470:amd64                470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA OpenGL-based Inband Frame Readback runtime library
ii  libnvidia-ifr1-470:i386                 470.57.02-1pop0~1627044105~21.04~f9815ed                             i386         NVIDIA OpenGL-based Inband Frame Readback runtime library
rc  nvidia-compute-utils-460                460.73.01-1pop0~1620243205~20.10~9a91ef9                             amd64        NVIDIA compute utilities
ii  nvidia-compute-utils-470                470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA compute utilities
rc  nvidia-dkms-460                         460.73.01-1pop0~1620243205~20.10~9a91ef9                             amd64        NVIDIA DKMS package
ii  nvidia-dkms-470                         470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA DKMS package
rc  nvidia-driver-460                       460.67-1pop0~1616430777~20.10~71e1ad1                                amd64        NVIDIA driver metapackage
ii  nvidia-driver-470                       470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA driver metapackage
rc  nvidia-kernel-common-460                460.73.01-1pop0~1620243205~20.10~9a91ef9                             amd64        Shared files used with the kernel module
ii  nvidia-kernel-common-470                470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        Shared files used with the kernel module
ii  nvidia-kernel-source-470                470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA kernel source package
ii  nvidia-settings                         470.57.01-0ubuntu0.21.04.1                                           amd64        Tool for configuring the NVIDIA graphics driver
ii  nvidia-utils-470                        470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA driver support binaries
ii  screen-resolution-extra                 0.18build2                                                           all          Extension for the nvidia-settings control panel
ii  xserver-xorg-video-nvidia-470           470.57.02-1pop0~1627044105~21.04~f9815ed                             amd64        NVIDIA binary Xorg driver
 ~ 

    Re-Install the driver package by installing the latest nvidia-driver-xxx package to your system with the following command:

    sudo apt install nvidia-driver-xxx

    Accept the additional packages and after the installation, reboot your system. You should now have the correct output when you run the glxinfo command in the first paragraph.

    glxinfo|egrep "OpenGL vendor|OpenGL renderer"

    Example output:

    ~  glxinfo|egrep "OpenGL vendor|OpenGL renderer"
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: NVIDIA GeForce GTX 1050 Ti with Max-Q Design/PCIe/SSE2
 ~

  • My favorite Gnome Extensions

    Gnome has been my favourite Window Manager for ages, to me it feels like a cosy blanket meaning that I’ve arrived at home 🙂

    Part of that feeling is because of the awesome extensions that so many enthusiasts have made over the years. If you don’t know, the extensions add so much productivity and possibilities to an already great window manager.

    I’ve put my favourite extensions in the list below. This list is part so that I can remember myself but also to explain why some of these extensions are so cool to use (to me at least)

    Click the Extension name in the table below to go to the extensions web page on extensions.gnome.org

    ExtensionAwesome index
    (1-5)    		Why it is so awesome
    Activities Configurator3Allows you to customize the Activities logo and fine tune the menu bar

    Caffeine2Disable the screensaver and auto suspend, great for watching video’s or extreme prolonged pondering of diagrams

    Clipboard Indicator5Clipboard manager for Gnome. I ALWAYS use a clipboard manager, doesn’t matter if I’m working on a Windows, Linux of OSx machine, it is one of the first things I install. Such a productivity booster.
    Clipboard indicator is one of a few clipboard managers in the extensions repository, I like the simplicity.

    Dash to Dock5A dock for the Gnome Shell. One of the most popular extensions because it turns the dash into a dock! (What’s in a name) Makes switching and launching of applications easier.
    Desktop Icons NG (DING)2Adds icons to the desktop (for the ~/Desktop folder)
    Draw On You Screen3This extension allows me to draw on the screen when making screencasts.
    You can toggle the drawing on/off with a keyboard shortcut.
    gTile5Makes it easy to order your windows in a grid. Very nice productivity tool.
    I mostly use the 5×4 grid, with browsers having a size of 2×4 and terminals sized 1×4.
    You can switch on the fly between three (configurable) grid presets

    Internet Radio4Small widget which streams internet radio. I most often listen to Pinguin Radio and some of the local Dutch radio stations.
    Note: Does not listen to the keyboard media keys
    Favourite radio stations:
    Pinguin Radio: http://streams.pinguinradio.com/PinguinRadio192.mp3
    Radio 538: http://22353.live.streamtheworld.com/RADIO538AAC.aac
    Radio Veronica: https://20873.live.streamtheworld.com/VERONICA.mp3
    Radio 3FM: http://icecast.omroep.nl/3fm-bb-mp3
    Quick Close in Overview5Very simple yet effective: Middle mouse button in Overview (Win-key) closes the application
    Sound Input & Output Device Chooser4Shows all the input and output devices. I love this since I have several audio in- and outputs (USB amp / headphones / HDMI output via monitor) for different purposes.
    This extension gives me the current selected in- and output as well as letting me choose quickly.

    System Monitor5One of the simplest and cleanest looking system monitors (CPU, Mem, Storage, Network, Load)
    It takes minimal space in the bar, yet gives me exactly the information I want on a glance. The extension works with colors (Shades of yellow, orange, red) to show how busy a resource is.
    For me this is very convenient if I want to know IF my CPU is being used heavily. One click on the pane and you see the top 5 of each category in a handy overview.

    VirtualBox applet3Shows a list of running VirtualBox machines. I use this widget mostly to check if there is any running Vagrant stuff I forgot after a day of work
    Workspace Scroll3Allows me to scroll anywhere in the top panel to change the workspace.
    Very convenient when working with multiple workspaces.
    Wallpaper Changer4Changes the wallpaper based on several providers, I have it set to pick a picture from a folder every 30 minutes.
    It also serves a little like a pomodoro timer that way.
    Tray Icons4Always handy to keep the tray icons in sight.
    Table with my favorite extensions

    Summary

    I feel these extensions help a lot with increasing productivity and are a massive part of why I love working on Linux with the Gnome Window Manager.

  • Create a Java path entry for all users

    I install Java on all my machines and used to add the java path and home variables to the user (or my user) bash profile but every time I added another user this is a manual step.

    Until I found this small trick. Add a system wide profile path setting by creating a file in:

    /etc/profile.d/filename

    All files in profile.d are added to every users login. Much cleaner than adding it to every user’s profile.

    This is the contents of my file:

    /etc/profile.d/java-path.sh

    export JAVA_HOME="/opt/java"
    export PATH=$JAVA_HOME/bin:$PATH

    These variables are set next time you log in with any user on that system.

  • Pretty print XML on Linux Command Line BASH

    It’s quite handy to indent XML when you need to read it with the human eye, but on a terminal it’s often not as easily readible.
    Fortunatly there’s a command which’ll indent it so you can actually read it;
    xmllint –format file.xml
    This will show you how ugly it could be:
     

    Screenshot Unformatted XML on terminal
    Screenshot Unformatted XML on terminal

     
    And behold the indented beauty of this little gem:
    Screenshot indented XML on terminal
    Screenshot indented XML on terminal