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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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
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5answers
4k views

What is the difference between 64-bit and 32-bit Operating systems? [duplicate]

Possible Duplicate: 32-bit vs. 64-bit systems I know that there are 2 types of OSs, 64 bit and 32 bit What is the main differences between them? And if I am buying a new laptop, which one ...
13
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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
340 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
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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
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5answers
13k 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
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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
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2answers
2k 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. ...
11
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4answers
7k 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 ...
11
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3answers
518 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
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3answers
3k 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 ...
11
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2answers
1k 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
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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
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8answers
60k 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?
10
votes
5answers
25k 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 ...
10
votes
3answers
391 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
640 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
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2answers
2k 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
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3answers
3k 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
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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
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5answers
2k 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
5answers
4k 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 ...
9
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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
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4answers
28k 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 -> ...
9
votes
3answers
35k 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 ...
9
votes
3answers
230 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 ...
8
votes
6answers
11k 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
783 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
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 ...
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
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
4answers
2k 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
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 ...
8
votes
3answers
18k 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
3k 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
6answers
5k views

Windows OS on external hard drive

Is it possible to install Windows OS to plug and play storage device such as external hard drives, HDD enclosures (with SATA hard drives), USB flashdrives[1] and the likes? What OS's? And if it's ...
7
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 ...
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
6k 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 ...
7
votes
2answers
11k views

How to map host PCI device to virtualbox?

In a virtual box it is possible to map host's USB device. But is it not possible to map host's PCI device to guest system? How is it possible to connect (map) a PCI device to guest OS? Our host ...
7
votes
2answers
434 views

How are page files stored on hard drives?

Just as RAM is divided into frames, the logical address space is divided into pages and the secondary storage into blocks of the same size. Pages are very small in size, 4 kB or so, and are swapped ...
7
votes
1answer
3k views

Install Chromium OS, but not from a USB

How can I install Chromium OS on my PC? I do not mean in a virtual machine, but actually a dual boot. I know you can boot from a USB, but that is not what I'm looking for. I really want to install ...
7
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4answers
3k views

Windows 8 PC added to trusted list but still thinks it's untrusted

I just upgraded both my PCs to Windows 8 x64 and I went through the process to add my PCs to the trusted list on Windows Live. Both computers appear on the list in my account settings online, but ...
6
votes
4answers
2k views

What determines endianness

I was wondering if endianness only depends on CPU? Does it depends on other hardware, such as memory, secondary storage device? Does it depends on OS? Why in Wikipedia, does it seem to be true? ...
6
votes
4answers
1k views

What is technically wrong with fast OS switching?

An application (fast switcher) stays resident before the OS starts, and will be activated using a key combination (for example: Ctrl + Alt + Shift + Esc). After detecting the key combination, the ...
6
votes
3answers
72k views

What is the exact command to restart a Redhat linux system?

I am new in linux. I want to know the exact command to restart a red hat linux server 6.3. and it has to start network drivers etc. I am using VPN to connect to remote machine using VNC. Can anyone ...