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1. Top results related to definition of unix operating system

   • Operating System Implementation of events/signals/wait handles

     Top Answer

     Answered Jul 19, 2010 · 3 votes

     In order to understand it in detail, you'll have to take a course in operating system (or at least buy a good book on the subject) because it actually involves quite a few systems.

     Basically, however, it relates to how thread state is managed. A thread is one of a few different states at any one time: sleeping, ready or running (there's usually more, but that's all that is needed for the purpose of this discussion). A thread in the running state is actually running and code in the thread is executing. A thread in the "sleeping" state is not running and the scheduler will skip over it when deciding who to run next. A thread in the "ready" state is not currently running, but once another thread goes to sleep or it's timeslice runs out, the scheduler is free to choose to schedule that thread to go into the running state.

     So basically, when you call "wait" on a mutex object, the OS checks whether the object is already owned by another thread and if so, sets the current thread's state to "sleeping" and also marks the thread as "waiting on" that particular mutex.

     When the thread that owns the mutex is finished, the OS loops through all of the threads that were waiting on it and sets them to "ready". The next time the scheduler comes around, it sees a "ready" thread and puts it in the "running" state. The thread starts running and checks whether it can get a lock on the mutex again. This time nobody owns it, so it can continue on it's merry way.

     In reality, it's a lot more complicated than that, and a lot of effort goes into making the system as efficient as possible (for example, to avoid waking a thread only to have it go immediately back to sleep, to avoid having a thread starving on a mutex that has lots of other threads waiting on it, etc, etc)

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     1/5

   • Operating System Error 123 On Backup of SQL Database Via Subprocess

     Top Answer

     Answered Sep 10, 2019 · 1 votes

     The problem is the : characters in your backup file's name: 2019-09 -09-16:24:46.bak

     Windows folder and file paths cannot contain : characters, except when delimiting the drive letter, e.g.: C:\foo\bar.txt is ok. C:\foo\bar:::baz.txt is not.

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     2/5

   • System.EventArgs Doesn't contain the definition of Button - C#

     Top Answer

     Answered Mar 15, 2016 · 3 votes

     The MouseClick

     event of DataGridView actually provides a MouseEventArgs argument. You declared your datagridview1_MouseClick method only with EventArgs.

     Change that to

     protected void datagridview1_MouseClick(object sender, MouseEventArgs e){ if (e.Button == ...

     and it should work (in case you used CellMouseClick instead of MouseClick, use DataGridViewCellMouseEventArgs instead of MouseEventArgs).

     As a side note: you don't get a compilation error when you add your "wrongly" declared handler like datagridview1.MouseClick += datagridview1_MouseClick, because MouseEventArgs is derived from EventArgs, so the compiler has no problem with that assignment. The problem arises when you try to access the properties of a MouseEventArgs instance via e when e is declared as EventArgs, because EventArgs doesn't know the properties of the MouseEventArgs derivate.

     P.S.: Please post your code as text to your next question. It's better for us to read or to re-use for reproducing the error than an image. In that image, I can't see if you used the MouseClick

     or CellMouseClick

     event

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     3/5

   • Operating System - Difference Between Distributed System and Parallel System

     A distributed system is a model where distributed applications are running on multiple computers linked by a communications network. Sometimes it is also called loosely coupled systems because in which each processor has its own local memory and processing units. LOCUS and MICROS are some examples of distributed operating systems.

     Parallel Systems are designed to speed up the execution of programs by dividing the programs into multiple fragments and processing these fragments at the same time. Flynn has classified computer systems into four types based on parallelism in the instructions and in the data streams. 

     • Single Instruction stream, single data stream
     • Single Instruction stream, multiple data stream
     • Multiple Instruction stream, single data stream
     • Multiple Instruction stream, multiple data stream

     Advantages of Distributed Systems:

     • Scalability: Distributed systems can be easily scaled by adding more computers to the network.

     Check all answers on Geeksforgeeks

     4/5

   • Operating System - Difference Between Distributed System and Parallel System

     A distributed system is a model where distributed applications are running on multiple computers linked by a communications network. Sometimes it is also called loosely coupled systems because in which each processor has its own local memory and processing units. LOCUS and MICROS are some examples of distributed operating systems.

     Parallel Systems are designed to speed up the execution of programs by dividing the programs into multiple fragments and processing these fragments at the same time. Flynn has classified computer systems into four types based on parallelism in the instructions and in the data streams. 

     • Single Instruction stream, single data stream
     • Single Instruction stream, multiple data stream
     • Multiple Instruction stream, single data stream
     • Multiple Instruction stream, multiple data stream

     Advantages of Distributed Systems:

     • Scalability: Distributed systems can be easily scaled by adding more computers to the network.

     Check all answers on Geeksforgeeks

     5/5

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2. en.wikipedia.org › wiki › UnixUnix - Wikipedia

   en.wikipedia.org › wiki › Unix

   • Cached

   The Unix system is composed of several components that were originally packaged together. By including the development environment, libraries, documents and the portable, modifiable source code for all of these components, in addition to the kernel of an operating system, Unix was a self-contained software system. This was one of the key ...

3. www.britannica.com › technology › UNIXUNIX | Definition, Meaning, History, & Facts | Britannica

   www.britannica.com › technology › UNIX

   • Cached

   operating system. UNIX, multiuser computer operating system. In the late 20th century UNIX was widely used for Internet servers, workstations, and mainframe computers. The main features of UNIX were its simplicity, portability (the ability to run on many different systems), multitasking and multiuser capabilities, extensive library of software ...

   • Author: The Editors of Encyclopaedia Britannica

4. www.geeksforgeeks.org › introduction-to-unix-systemIntroduction to UNIX System - GeeksforGeeks

   www.geeksforgeeks.org › introduction-to-unix-system

   • Cached

   6 days ago · UNIX is a family of multitasking, multiuser computer operating systems developed in the mid 1960s at Bell Labs. It was originally developed for mini computers and has since been ported to various hardware platforms. UNIX has a reputation for stability, security, and scalability, making it a popular choice for enterprise-level computing.

5. www.techtarget.com › searchdatacenter › definitionWhat is Unix? - TechTarget

   www.techtarget.com › searchdatacenter › definition

   Unix -- often spelled UNIX , especially as an official trademark -- is a multi-user operating system designed for flexibility and adaptability. Originally developed in the 1970s, Unix was one of the first operating systems to be written in C language .

6. unix.org › what_is_unixWhat is UNIX

   unix.org › what_is_unix

   • Cached

   Why This is Different. The UNIX brand has traditionally been applied to the family of multitasking, multiuser computer operating systems that derive from the original AT&T UNIX operating system, developed in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others -- [Source:Wikipedia link ] Today, The Open Group ...

7. linuxsimply.com › what-is-unix-operating-systemWhat is Unix Operating System? [A Complete Overview]

   linuxsimply.com › what-is-unix-operating-system

   • Cached

   Dec 27, 2023 · Unix (trademarked as UNIX) is an operating system (OS) that is one of the first OS developed using the C programming language. It is a multitasking, multi-user OS that provides a set of programs to act as a link between the computer and the user. The primary design philosophy of Unix is to offer simple yet powerful tools to perform complex tasks.

8. People also ask

   Is Unix a multi-user operating system?

   • Unix is a multi-user operating system — multiple users can log in at the same time and run programs simultaneously. It uses a hierarchal file system that allows an arbitrary number of nested subfolders. Unix servers hosted many early Internet services, and versions of it continue to run on most servers now.

   Unix Definition - What is Unix? - TechTerms.com

   techterms.com/definition/unix

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   What is a Unix operating system?

   • UNIX, multiuser computer operating system. In the late 20th century UNIX was widely used for Internet servers, workstations, and mainframe computers. The main features of UNIX were its simplicity, portability, multitasking and multiuser capabilities, and hierarchical file system.

   UNIX | Definition, Meaning, History, & Facts | Britannica

   www.britannica.com/technology/UNIX

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   Is Unix a good operating system?

   • UNIX is a family of multitasking, multiuser computer operating systems developed in the mid 1960s at Bell Labs. It was originally developed for mini computers and has since been ported to various hardware platforms. UNIX has a reputation for stability, security, and scalability, making it a popular choice for enterprise-level computing.

   Introduction to UNIX System - GeeksforGeeks

   www.geeksforgeeks.org/introduction-to-unix-system/

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   Why is Unix considered the heart of the operating system?

   • Unix was considered to be the heart of the operating System. The system Structure of Unix OS are as follows: UNIX is a family of multitasking, multiuser computer operating systems developed in the mid 1960s at Bell Labs. It was originally developed for mini computers and has since been ported to various hardware platforms.

   Introduction to UNIX System - GeeksforGeeks

   www.geeksforgeeks.org/introduction-to-unix-system/

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9. techterms.com › definition › unixUnix Definition - What is Unix? - TechTerms.com

   techterms.com › definition › unix

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   Feb 9, 2023 · Unix: Also known as UNIX, though the letters do not stand for anything. The Unix operating system was first created in Bell Labs way back in the 1960s. It became popular in the 1970s for high-level computing, but not on the consumer level. Since a lot of Internet services were originally hosted on Unix machines, the platform gained tremendous ...