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.

Marcin Juszkiewicz: OpenDev CI speed-up for AArch64

I work with OpenDev CI for a while. My first Kolla patches were over three years ago. We (Linaro) added AArch64 nodes few times — some nodes were taken down, some replaced, some added.

Speed or lack of it

Whenever you want to install some Python package using pip it is downloaded from Pypi (directly or mirror). If there is a binary package then you get it, if not then “noarch” package is fetched.

In worst case source tarball is downloaded and whole build process starts. You need to have all required compilers installed, development headers for Python and all required libraries and rest of needed tools. And then wait. And wait as some packages require a lot of time.

And then repeat it again and again as you are not allowed to upload packages into Pypi for projects you do not own.

Argh you, protobuf

There was a new release of protobuf package. OpenStack bot picked it up, sent patch for review and it got merged.

And all AArch64 CI jobs failed…

Turned out that protobuf 3.12.0 was released with x86 wheels only. No source tarball. At all.

This turned out to be new maintainer mistake — after 2-3 weeks it was fixed in 3.12.2 release.

Another CI job then

So I started looking at...


I work with OpenDev CI for a while. My first Kolla patches were over three years ago. We (Linaro) added AArch64 nodes few times — some nodes were taken down, some replaced, some added.

Speed or lack of it

Whenever you want to install some Python package using pip it is downloaded from Pypi (directly or mirror). If there is a binary package then you get it, if not then “noarch” package is fetched.

In worst case source tarball is downloaded and whole build process starts. You need to have all required compilers installed, development headers for Python and all required libraries and rest of needed tools. And then wait. And wait as some packages require a lot of time.

And then repeat it again and again as you are not allowed to upload packages into Pypi for projects you do not own.

Argh you, protobuf

There was a new release of protobuf package. OpenStack bot picked it up, sent patch for review and it got merged.

And all AArch64 CI jobs failed…

Turned out that protobuf 3.12.0 was released with x86 wheels only. No source tarball. At all.

This turned out to be new maintainer mistake — after 2-3 weeks it was fixed in 3.12.2 release.

Another CI job then

So I started looking at ‘requirements’ project and created a new CI job for it. To check are new package versions are available for AArch64. Took some time and several side updates as well (yak shaving all the way again).

Stuff got merged and works now.

Wheels cache

While working on above CI job I had a discussion with OpenDev infra team how to make it work properly. Turned out that there were old jobs doing exactly what I wanted: building wheels and caching them for next CI tasks.

It took several talks and patches from Ian Wienand, Clark Boylan, Jeremy ‘fungi’ Stanley and others. Several CI jobs got renamed, some were moved from one project to another. Servers got configuration changes etc.

Now we have wheels built for both x86-64 and AArch64 architectures. Covering CentOS 7/8, Debian ‘buster’ and Ubuntu ‘xenial/bionic/focal’ releases. For OpenStack ‘master’ and few stable branches.

Effect

Requirements project has quick ‘check-uc’ job running on AArch64 to make sure that all packages are available for both architectures. All OpenStack projects profit from it.

In Kolla ‘openstack-base’ image went from 23:49 to just 5:21 minutes. Whole Debian/source build is now 57 minutes instead of 2 hours 20 minutes.

Nice result, isn’t it?


Read full article on Planet Ubuntu


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