What is an operating system?

An operating system (OS) is the Application Which, after being initially loaded into the computer by a boot program, oversees all the other application programs in a computer. The application programs make use of the working system by making Furthermore, users can interact directly with the operating system Via a user interface like a command line or a graphical user interface (GUI).

9 Popular Mobile Operating Systems

Android OS (Google Inc.) ...
2. Bada (Samsung Electronics) ...
BlackBerry OS (Research In Motion) ...
iPhone OS / iOS (Apple) ...
MeeGo OS (Nokia and Intel) ...
Palm OS (Garnet OS) ...
Symbian OS (Nokia) ...
webOS (Palm/HP) ...

Types of operating systems.

Operating systems normally include pre-loaded on almost any Computer you purchase. Many men and women use the operating system which comes with their computer, however it is possible to update or perhaps alter operating systems. The three most frequent operating systems for personal computers are Microsoft Windows, macOS, and Linux. A GUI enables you to use your mouse to click on icons, switches , and menus, and that which is clearly displayed on the display by means of a combo of images and text. Each operating system's GUI includes a different feel and look, so if you Switch to another operating system it might appear unfamiliar at first. However, modern operating systems have been made to be effortless to utilize , and the majority of the fundamental principles are exactly the same.

Microsoft established the Windows operating platform at the mid-1980s. There have been a number of distinct variants of Windows, but the latest ones are Windows 10 (published in 2015), Windows 8 (2012), Windows 7 (2009), along with Windows Vista (2007). Windows includes pre-loaded on many new PCs, which helps to ensure it is the hottest operating system on the planet.
Microsoft Windows
Microsoft established the Windows operating platform at the mid-1980s. There have been a number of distinct variants of Windows, but the latest ones are Windows 10 (published in 2015), Windows 8 (2012), Windows 7 (2009), along with Windows Vista (2007). Windows includes pre-loaded on many new PCs, which helps to ensure it is the hottest operating system on the planet.
MacOS (formerly called OS X) is a Lineup of operating systems made by Apple. It comes preloaded on all Macintosh computers, or Macs. A number of the specific models include Mojave (published in 2018), High Sierra (2017), and Sierra (2016). Based on StatCounter Global Stats, macOS users accounts for significantly less than 10 percent of international functioning systems--considerably lower than the percent of Windows users (greater than 80 percent ). 1 reason behind this is that Apple computers have a tendency to be costlier. But a lot of individuals do prefer the appearance and feel of macOS over Windows.
macOS
MacOS (formerly called OS X) is a Lineup of operating systems made by Apple. It comes preloaded on all Macintosh computers, or Macs. A number of the specific models include Mojave (published in 2018), High Sierra (2017), and Sierra (2016). Based on StatCounter Global Stats, macOS users accounts for significantly less than 10 percent of international functioning systems--considerably lower than the percent of Windows users (greater than 80 percent ). 1 reason behind this is that Apple computers have a tendency to be costlier. But a lot of individuals do prefer the appearance and feel of macOS over Windows.
Linux (pronounced LINN-ux) is a household of open-source operating systems, so they may be altered and distributed by all around the globe. This differs from proprietary program such as Windows, which may only be altered by the organization that owns it. The benefits of Linux are that it's free, and there are several different distributions or variations you may select from. Based on StatCounter Global Stats, Linux users accounts for under 2 percent of international functioning systems. But most servers run Linux since it's relatively simple to personalize.
Linux
Linux (pronounced LINN-ux) is a household of open-source operating systems, so they may be altered and distributed by all around the globe. This differs from proprietary program such as Windows, which may only be altered by the organization that owns it. The benefits of Linux are that it's free, and there are several different distributions or variations you may select from. Based on StatCounter Global Stats, Linux users accounts for under 2 percent of international functioning systems. But most servers run Linux since it's relatively simple to personalize.
The operating systems we have been speaking about so much were created to operate on desktop and notebook computers. Mobile apparatus like telephones , tablets , and MP3 players Are distinct from desktop and notebook computers, so that they run operating systems that have been designed especially for mobile devices. From the screenshot below, you can view iOS running in an iPad. Operating systems for mobile devices normally are not as fully featured As those created for desktop and notebook computers, and they are not capable to Run each the exact same software. But, you can still perform a Great Deal of things Together, like watch videos, browse the net, manage your calendarand play games.
Operating systems for mobile devices
The operating systems we have been speaking about so much were created to operate on desktop and notebook computers. Mobile apparatus like telephones , tablets , and MP3 players Are distinct from desktop and notebook computers, so that they run operating systems that have been designed especially for mobile devices. From the screenshot below, you can view iOS running in an iPad. Operating systems for mobile devices normally are not as fully featured As those created for desktop and notebook computers, and they are not capable to Run each the exact same software. But, you can still perform a Great Deal of things Together, like watch videos, browse the net, manage your calendarand play games.

Nobuto Murata: Shortcut key to mute/unmute yourself in Zoom or Google Meet

A custom and global shortcut key to mute / unmute yourself in Zoom or Google Meet

Just like everyone else, 2020 was the year of having more and more video-conference calls. How many times did we struggle to find the meeting window during a call, and say “Sorry, I was on mute”? I tried to address the pain and ended up with the following setup.

xdotool

xdotool is a great automation tool for X, and it can search a window, activate it, and simulate keyboard input. That’s a perfect match for the use case here.

Here is an example command for Google Meet.

$ xdotool search --name '^Meet - .+ - Chromium$' 
    windowactivate --sync 
    key ctrl+d

In the chained commands, it does:

  1. search windows named like Meet - <MEETING_ID> - Chromium
  2. activate the first window passed by the previous line and wait until it gets active (--sync)
  3. send a keystroke as Ctrl+D, which is the default shortcut in Meet

By the way, my main browser is Firefox, but I have to use Chromium to join Meet calls since it tends to have less CPU utilization.

You can do something similar for Zoom with Alt+A.

$ xdotool search --name '^Zoom Meeting$' 
    windowactivate --sync 
    key...


A custom and global shortcut key to mute / unmute yourself in Zoom or Google Meet

Just like everyone else, 2020 was the year of having more and more video-conference calls. How many times did we struggle to find the meeting window during a call, and say “Sorry, I was on mute”? I tried to address the pain and ended up with the following setup.

xdotool

xdotool is a great automation tool for X, and it can search a window, activate it, and simulate keyboard input. That’s a perfect match for the use case here.

Here is an example command for Google Meet.

$ xdotool search --name '^Meet - .+ - Chromium$' \
    windowactivate --sync \
    key ctrl+d

In the chained commands, it does:

  1. search windows named like Meet - <MEETING_ID> - Chromium
  2. activate the first window passed by the previous line and wait until it gets active (--sync)
  3. send a keystroke as Ctrl+D, which is the default shortcut in Meet

By the way, my main browser is Firefox, but I have to use Chromium to join Meet calls since it tends to have less CPU utilization.

You can do something similar for Zoom with Alt+A.

$ xdotool search --name '^Zoom Meeting$' \
    windowactivate --sync \
    key alt+a

Microsoft Teams should work with xdotool and Ctrl+Shift+M at least for the web version.

GNOME keyboard shortcuts

The commands above can be mapped to a shortcut key with GNOME.

It’s pretty simple, but some tricks may be required. As far as I see, gsd-media-keys will invoke a command when a shortcut key is pressed, not released. In my case, I use Ctrl+space as the shortcut key, so Meet may recognize keys pressed as Ctrl+space + Ctrl+D = Ctrl+space+D which doesn’t trigger the mute/unmute behavior actually. Keys can be canceled with keyup, so the key command was turned into keyup space key ctrl+d in the end.

Also, I wanted to use the same shortcut key for multiple services, and I have the following line which tries Google Meet first, then Zoom if no Meet window is found. It should work most of the cases unless you join multiple meetings at the same time.

sh -c "
    xdotool search --name '^Meet - .+ - Chromium$'
        windowactivate --sync
        keyup space key ctrl+d
    || xdotool search --name '^Zoom Meeting$'
        windowactivate --sync
        keyup ctrl+space key alt+a
"

--clearmodifiers can be used to simplify the whole commands, but when I tried, it sometimes left the Ctrl key pressed depending on the timing I released the key.

Hardware mute/unmute button

Going further, I wanted to have a dedicated button to mute/unmute myself especially for some relaxed meetings where I don’t have to keep my hands on the keyboard all the time.

Back in October, I bought a USB volume controller, which is recognized as “STMicroelectronics USB Volume Control” from the OS. It was around 15 USD.

It emits expected events as KEY_VOLUMEUP and KEY_VOLUMEDOWN with the dial, and KEY_MUTE when the knob is pressed.

I created a “hwdb” file to remap the mute key to something else as follows in /etc/udev/hwdb.d/99-local-remap-usb-volume-control.hwdb.

# STMicroelectronics USB Volume Control
# Remap the click (Mute) to XF86Launch
evdev:input:b0003v0483p572D*
 KEYBOARD_KEY_c00e2=prog4

Once the hardware database is updated with systemd-hwdb update and the device is unplugged and plugged again (if without udevadm commands), I was able to map Launch4(prog4) to the xdotool commands in GNOME successfully.

It looks like everyone had the same idea. There are fancier buttons out there :-)

Never going to fumble for the mute button on a google meet again. Plus bonus pac man feels. @sparkfun pic.twitter.com/2oG7U2EcoR

— joe (@joemcmanus) December 23, 2020

Read full article on Planet Ubuntu


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