Hot answers tagged

88

Does every OS need RAM?For IBM PC compatible hardware, a mandatory step of the BIOS POST process is to check if there is RAM to load the BIOS into. Optionally the POST process checks of your RAM functions correctly. After the POST process, the BIOS loads the bootloader to the RAM and gives control to the bootloader. So the answer to your question ("Does ...


75

DriveImage XML DriveImage XML will do the job. It runs from within Windows and it can copy directly from drive to drive. A lot of people rave about it after good experiences with the software. DriveImage XML is an easy to use and reliable program for imaging and backing up partitions and logical drives. Image creation uses Microsoft's Volume ...


68

With modern OSs, practically none. Linus Torvalds reportedly said its task is to "just load the OS and get the hell out of there". Older operating systems like MS-DOS relied on the BIOS for many tasks (e.g. disk access), by calling interrupts. With modern OSs, the bootloader quickly switches into 32- or 64-bit mode and executes the OS kernel. The kernel ...


59

A service marked as Automatic (Delayed Start) will start shortly after all other services designated as Automatic have been started. In my experience, this means that they are started 1-2 minutes after the computer boots. The setting is most useful in lessening the "mad rush" for resources when a machine boots. Note that when you have 20 services all being ...


59

Both. CMOS stores BIOS configuration information. When you "enter setup", you are running the BIOS's configuration program, which loads the settings defined in CMOS. You are "setting up" the CMOS, by providing configuration information the BIOS will use as it runs. The BIOS is a program written as Firmware onto a ROM, so it cannot be written to (except by ...


49

You can also use quser to see the login time.


49

0xFFFFFFF0 is where an x86-compatible CPU starts executing instructions when it's powered on. That's a hardwired, unchangeable (without extra hardware) aspect of the CPU and different types of CPUs behave differently. Why the first BIOS instruction is located at the "top" of a 4 GB RAM? It's located at the "top" of 4 GB address space - and on ...


43

It can be found here: C:\Users\%USERNAME%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup or easier to access with this command in the Run Win+R prompt: shell:startup Here are even more explanations of how accessing/viewing the startup folder.


42

In the console, you could write: sudo update-rc.d -f apache2 remove sudo update-rc.d -f mysql remove ... For additional information read Ubuntu Bootup How to.


40

The biggest problem with booting an ISO file is that ISOs that are designed to be booted are almost always designed to be booted from a CD. As explained on Marco's blog regarding Grub 2 (emphasis mine): GRUB can read ISO9660 (”iso”) images. It can for example load the first few sectors and boot it. But most people do not realize is “what then?”. What ...


37

Although fsarchiver is quite an underrated allround (offline) non-gui Linux tool (from the creators of PartImage that iirc doesn't support Ext4), I agree that DriveImage XML is the best answer so far. But also try MiniTool Partition Wizard Home Edition. Next time. ;) Here's a summary of tools for partition cloning I have used in the past: MiniTool ...


37

The fastest way is to use Bootchamp. It adds an option in the Mac menu bar where you can just click and choose "Restart in Windows". Q.E.D.


37

Ubuntu 10.04 has abandoned SysV init script approach to booting the system. This link explains - http://www.linuxplanet.com/linuxplanet/tutorials/7033/1/ To prevent mysql from starting on boot 1 go to the /etc/init directory 2. open the mysql.conf file 3. comment out the "start on" line near the top of the file, the "start on" ...


37

To run a command on start up on OS X, you need to use launchd. If you don't want to use Lingon, you need to create a launchd Property List. This is an XML file, so you can do it with your favourite text editor or alternatively you can use the Property List Editor that's installed with the Mac OS X Dev Tools. Create the following: <?xml version="1.0" ...


37

When you are at the GRUB menu where you select which OS to boot (if this menu don’t appear, press ESC while you get the “Booting CentOS in X seconds”), press e to edit your boot commands. You should see a screen like this: (parameters may vary) Look for the line that begins with kernel. Choose it and then press e again. You will be at a simple editor, add ...


36

GParted GParted on the Ubuntu (and I'm sure other Linux distros) Live CD will do exactly this. I've used it to successfully migrate entire operating systems from one dying drive to another new drive. GParted is a free partition editor for graphically managing your disk partitions. GParted is useful for tasks such as: creating space for new ...


36

Windows 7 uses what's available on the box ... out of the box. You should not twiddle around with the boot process except when you know what you are doing, otherwise things will become slower / more unstable, etc. And you should not believe what you read on the Internet. That said: To tell Windows 7 to NOT use of all the cores that are available ...


36

From the Building Windows 8 blog: Now here’s the key difference for Windows 8: as in Windows 7, we close the user sessions, but instead of closing the kernel session, we hibernate it. Compared to a full hibernate, which includes a lot of memory pages in use by apps, session 0 hibernation data is much smaller, which takes substantially less time ...


35

Use TransMac, which has a 15-day trial period and works flawlessly. In the left pane, right click the USB Drive and select Restore with Disk Image Point to your .dmg file and click Open. It will take a few minutes depending on size of .dmg and speed of USB drive, but once done you can pop it into your mac, hold down the option key when turning on the ...


33

It's possible in theory, but it would be very slow, since it'd need to use the disk for any temporary storage that didn't fit in the CPU caches. (CPUs have a few megabytes of cache because even RAM is too slow for them. Think about that.) So you'd need a rather small OS. But, another thing is, the BIOS runs before and outside any installed operating system, ...


30

sudo touch /forcefsck Then reboot.


29

Open the Registry Editor, and add the filename as string to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce when you are logged in as that specific user, or to HKEY_LOCAL_MACHINE\... which opens that file for ány user.


28

The BIOS provides a number of services to the Operating Systems, most of which are related to power management: modifying the CPU and bus clocks enabling/disabling mainboard devices expansion port power control suspend-to-disk and suspend-to-RAM resume event settings Suspend-to-disk is implemented in the OS most of the time as the OS can restore its ...


28

First, you're conflating two or three different things (perhaps because of poorly worded program messages): Firmware type -- Old PCs used the Basic Input/Output System (BIOS), but new computers use the Extensible Firmware Interface (EFI) or its newer variant, the Unified EFI (UEFI). The main duty of both the BIOS and the EFI is to start the boot process, ...


27

Clonezilla You could try out Clonezilla Live. Clonezilla, based on DRBL, Partclone and udpcast, allows you to do bare metal backup and recovery. Two types of Clonezilla are available, Clonezilla live and Clonezilla SE (server edition). Clonezilla live is suitable for single machine backup and restore. It doesn't perfectly meet your requirements, but ...


27

Another simple solution from Stack Overflow: You can: Start Automator.app; Select "Application"; Click "Show library" in the toolbar (if hidden); Add "Run shell script" (from the Actions/Utilities); Copy-and-paste your script into the window; Test it; Save it somewhere: a file called your_name.app will be created); Go to System Preferences → Accounts → ...


27

Use the following command in a Command Prompt: net user [username] It will be next to Last Logon. EDIT If your screen becomes locked and you use the method above it will display the last time the screen was unlocked. You will have to use this command below to get the initial login time: quser


26

Officially none of these. The Apple suggested way is to use launchd. A Gui to set this up is lingon As for the files you mention the ones in the home directory ~/.bashrc, ~/profile, ~/.bash_profile are only started when you login via a terminal. EDIT: The ones in /etc are run by the shell starting for all users before the one in home directory. bash ...


26

For Windows, see this article : Boot your USB Drive in VirtualBox. For Linux, the same approach is described in : How to boot from USB in virtualbox on Ubuntu. The approach is to attach a physical drive to a virtual machine using the VBoxManage command-line tool that comes bundled with VirtualBox. You can then boot your virtual machine from the attached ...



Only top voted, non community-wiki answers of a minimum length are eligible