The layer between your hardware and software. It manages disk input/output, memory allocation, graphic acceleration, hosting device drivers and various other resources.

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13
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8answers
3k views

How can I make it difficult to install a new operating system on a certain computer?

I want to host a website on a desktop computer running Ubuntu with a Windows virtual machine. I will give away the computer in exchange for a number of months of remote web hosting. I want to add some ...
13
votes
5answers
3k views

Why can't we use/set function keys as password keys?

In any operating system the passwords with Fn were not allowed. For instance, I can't keep Fn + some character as password. What's the reason behind it? Any technical aspect which prevents the ...
13
votes
4answers
25k views

How do I know my laptop is 64-bit compatible?

I recently plan to buy a new laptop to run a 64-bit OS, but a friend told me that my current laptop is already 64-bit. How can I verify if my laptop is ready to load a 64-bit OS or not? Here is the ...
13
votes
4answers
360 views

Which multi-user operating systems allow a user to see the current command line of other users?

I was reading the manpage of unzip, and ran into the following -P password use password to decrypt encrypted zipfile entries (if any). THIS IS INSECURE! Many multi-user operating ...
12
votes
6answers
3k views

Does opening a lot of tabs in Google chrome cause a performance issue?

I have heard that each tab in a Google chrome is a separate process. So if any tab crashed it won't be affected to the whole browser. So if you open so many tabs there will be as many processes in the ...
12
votes
2answers
3k views

How to stop and detect the fork bomb

#include <stdlib.h> #include <unistd.h> int main() { while(1) fork(); } This is the code for a fork bomb. In our college, we connect via telnet i.e client serving protocol. ...
12
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8answers
73k views

How can I determine the OS of a remote computer?

How can I determine the OS of a remote computer, given its computer name?
12
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3answers
8k views

How does USB device recognition work?

I'm curious how USB device recognition works in Windows. I imagine it's something like this: When you plug in a device, it tells Windows "here's my device ID to tell you what I am" Windows looks to ...
12
votes
3answers
4k views

How can I distinguish current operating system in my .vimrc?

I use Vim on both OS X and Windows, with almost identical configuration. I would like to be able to use the same .vimrc on the two operating systems, but there are a couple of things I need to ...
12
votes
5answers
15k views

Does low disk space affect SSD performance?

I was wondering if having less than 5-10GB of free space on an SSD would affect performance. Is it specific to SSD or is it more of an operating system aspect? For example, on an Intel X-25 G2 that ...
11
votes
10answers
3k views

Can a single OS installation on an SSD be shared between a desktop and a laptop?

I recently purchased an SSD and was wondering if there was an Operating System that allows you to swap between two different machines essentially sharing one partition? Perhaps multiple hardware ...
11
votes
3answers
525 views

What is a kernel panic?

I know that this sounds like a LMGTFY question but i thought i'd ask it so that google actually turns up (more) good results. What is it?
11
votes
2answers
2k views

How many hours the PC has worked

I will buy a used PC and I want to know how many hours the PC has worked. I have already found : systeminfo | findstr /C:"Install Date" systeminfo | findstr /C:"BIOS Version" but I need to know ...
10
votes
6answers
3k views

What is the difference between Unix and Linux? [duplicate]

I want to know what the actual difference between Unix and Linux is. Do they share the same kernel? Is Linux built on Unix? Do programs written for Linux work on Unix and vice-versa?
10
votes
5answers
9k views

RAMDISK OS? Installing Windows 10 on a ramdisk

Is it possible to put the entire operating system on a ram disk? If I have 16 GB of RAM and it is an Intel Xeon. I don't have an SSD and my hard drive is killing my boot time. So can I just allocate ...
10
votes
5answers
26k views

How to check whether my OS is 64-bit or 32-bit?

What is the best way to determine whether my OS is 64-bit or 32-bit ? Assume that, I directly on some os & I am going to install a software on it. But how to determine, whether OS is 32-bit or 64-...
10
votes
4answers
32k views

How to find my Windows OS is x64 or ia64?

Let me explain the scenario. While I scan many executables in my windows director with ProtectionID, I had to scan Windows Explorer. And the results or given below. Scanning -> C:\Windows\...
10
votes
3answers
402 views

How does a computer know which CD/DVDs to boot from?

What actually happens when a user reboots his or her system with an OS disk (or other bootable disk) in the CD/DVD drive? For example, when I put in my OS installation CD and start the computer up, ...
10
votes
2answers
680 views

Running Homemade Operating System

Starting out with an operating system you wrote, how could you run it and test it on a computer? Would you have to delete the current operating system that is being used, or could you run one ...
10
votes
2answers
3k views

How OS detects memory access violations

How does an operating system (preferably Linux) know that you've accessed a memory location that you're not allowed to? This question was inspired by those damn pointers! The way I see it is: ...
10
votes
3answers
4k views

Are drivers part of the operating systems?

I have difficulty in understanding what's included in an OS and what's not. Is a device driver such as a printer driver or graphic driver part of an OS? Thinking about the definition of an OS I ...
10
votes
3answers
43k views

Is it the address bus size or the data bus size that determines “8-bit , 16-bit ,32-bit ,64-bit ” systems?

My simple understanding is as follows. Memory (RAM) is composed of bits, groups of 8 which form bytes, each of which can be addressed ,and hence byte addressable memory. Address Bus stores the ...
10
votes
5answers
10k views

How to safely delete stuff from %SystemDrive%\Windows\Installer? [duplicate]

Possible Duplicate: Is it safe to delete from C:\Windows\Installer? Not Duplicate: The link mentioned above talks about Windows XP. I am talking about Windows 7. The behavior of the ...
9
votes
5answers
3k views

Why do operating systems have file size limits?

What limits a file to have some maximum size depending on the Operating System? From this page: I do not exactly understand this. If you have the storage space, what else can be the limitation? ...
9
votes
6answers
15k views

Windows OS on external hard drive

Is it possible to install Windows OS to plug and play storage devices such as external hard drives, HDD enclosures (with SATA hard drives), USB flashdrives and the likes? What OS's? And if it's ...
9
votes
4answers
1k views

Is BIOS considered an OS? [closed]

This question comes to mind when dealing with RAID arrays, but is not necessarily applicable to the subject. How is that the BIOS is able read from a hard drive to effectively load the OS, when ...
9
votes
4answers
2k views

What happens when you install > 4GB of RAM in a computer with a 32-Bit OS?

So I'm a programmer and I'm not a complete idiot so I know exactly why you can't access memory where you can't have pointers. But I've never tried this and I don't think I ever will because it seems ...
9
votes
1answer
296 views

Why do x86 CPUs only use 2 out of 4 rings?

So either Linux or Windows based x86 systems only use ring 0 for kernel mode and ring 3 for user mode. Why do processors even distinguish four different rings if they all end up using just two of them ...
9
votes
4answers
13k views

Can you re-install Windows 7 OEM on a new motherboard?

I want to buy a copy of Windows 7 OEM for my PC so I can run Adobe Premiere on a 64 bit OS. However, there seems to be a problem with OEM copies as some people say that once you install them you can't ...
9
votes
3answers
238 views

Swapfile on different drive

Is it worth to spend money on a small capacity HDD (~5-20 GB, very cheap though) to use it as swapping area for the OS? I do believe it will increase the OS performance , or maybe SSD (still ~5-20 GB)...
8
votes
6answers
13k views

Windows 7: Should I Install 64-bit or 32-bit Version? (x64 vs x86)

Deciding which Windows 7 version to install can be a difficult decision and can really limit what you can do with your system. Do you have any practical hints which could help decide which version to ...
8
votes
6answers
11k views

How to install Ubuntu, Windows XP and Windows 7 from scratch as triple-boot system

I'm currently running Windows XP, but have ordered Windows 7. I want to keep Windows XP on a separate partition, and install Ubuntu as well. In which order should I install the OSs, and is there ...
8
votes
2answers
800 views

Partitioning a hard drive

Is there a way to split a hard drive into more than 4 primary partitions? I am installing multiple OSs, and it would make life a lot easier if there was a way to do this. My hard drive is 1TB.
8
votes
2answers
1k views

What is the difference between Ubuntu, Xubuntu, and Lubuntu

I am relatively new to Linux operating systems and I'm trying to find out more about them. Unfortunately, I cant find a whole lot of good sources about them. Right now I get a bit confused and mixed ...
8
votes
6answers
2k views

Is file system part of operating system?

I was wondering if a file system on a storage device is part of OS? I don't think it is. Instead it is part of the storage device, and exists outside of any OS although was created by an OS. Is my ...
8
votes
3answers
6k views

Installing AucTeX 1.86 over Emacs.app in OS X

I am trying to install AucTeX 1.86 over an Emacs binary (version 24.0.50) from emacsformacosx.com. On first attempt ./configure outputs: configure: error: Cannot find the texmf directory! ...
8
votes
1answer
623 views

Can a Telnet server detect the client being used through the protocol?

While web browsers send, among other things, the User-Agent string, does the Telnet protocol have a similar method of determining anything about the client connecting to it? OS? Specific Telnet client?...
8
votes
4answers
3k views

What happens when a computer starts?

I'm trying to understand what happens when a computer is turned on. How the computer works on startup, various initializations that take place, etc. For example, is the bootstrap loader the first ...
8
votes
2answers
1k views

What does the term “OS rot” refer to?

I'm asking because I just saw a question about the "Best way to avoid OS Rot in Windows 7" and had never heard of the term "OS Rot" before. It's semi-comprehensible from context in that question, ...
8
votes
3answers
8k views

Difference between shutdown ( power off ) and restart ( reboot )

What is Difference between shutdown (power off) and restart (reboot) ? What type of signals passing at time of reboot and poweroff, to where ? What is difference between these two signals ? At ...
8
votes
2answers
3k views

Running Operating System from memory

Assuming SSD's are extremely prone to faliure how economical would it be to load an OS into main memory and run it from there? I can think I can deal with a few obvious drawbacks (I've survived ...
8
votes
3answers
22k views

Does it make sense to put your operating system on a SD card?

A friend suggested putting the whole operating system on a SD card, arguing that access time delays where much shorter than a regular hard drive, which needs to spin up first. Wikipedia, however, ...
7
votes
5answers
4k views

What is UNIX and what's UNIX-like?

Derived from this question: If opensolaris, freebsd, openbsd, netbsd are not UNIX, what is then? What confuses me more, is the fact OSX1.5+ is UNIX, while prior version of OSX weren't What is the ...
7
votes
2answers
7k views

intelliJ not working on El capitan 10.11

I just installed the new OS El capitan 10.11 and discovered that intelliJ isn't working on it. When I launch it, I get this error: "This application requires the legacy Java SE 6 runtime which is ...
7
votes
3answers
36k views

How are \n and \r handled differently on Linux and Windows?

I think \n moves the needle down, and \r moves the needle to the beginning of a line (left align)? I'm not sure, though. So, if I'm wrong please correct me.... Anyway, I was told that Windows and ...
7
votes
6answers
17k views

“This CPU is not compatible with 64-bit mode.” - Installing Windows 7 Ultimate 64-bit on a netbook with a 64-bit Intel Atom CPU

I tried installing Windows 7 Ultimate SP 1, 64-bit on a netbook (Lenovo IdeaPad S110), which has the Intel Atom N2800 (1.86 GHz) as its processor, but I get the following error message when the ...
7
votes
2answers
10k views

How can I determine what version of Windows in the windows.old folder?

I would like to know if there are any files or directory structures that will tell me what was the previous version of Windows that created the windows.old folder.
7
votes
4answers
17k views

What to do with a Linux OS microSD image file?

I am trying to install Ubuntu on the Odroid U2 SoC (http://www.hardkernel.com/renewal_2011/products/prdt_info.php) From this site I downloaded the "Micro-SD image file" (http://com.odroid.com/sigong/...
7
votes
4answers
4k views

Do operating systems run faster on smaller hard disk partitions?

If I partition my hard disk, is my computer going to perform faster/better? In other words, the smaller the active partition is (the partition with the operating system), the faster the operating ...
7
votes
2answers
7k views

Prevent exe execution from temp internet folder

how can i prevent exe excution from temp and internet temp folder. we have antivirus deployed but it does not prevent exe execution from temp folder. I have tried prog trust-no-exe http://www....