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	User Mode Definition (Site not responding. Last check: 2007-10-10)
		User mode is one of two distinct execution modes for the CPU (central processing unit) in Linux.
		This change in mode is termed a mode switch, which should not be confused with a context switch (i.e., the switching of the CPU from one process to another).
		In the case of a hardware interrupt, the signal originates from a hardware device such as a keyboard (e.g., when a user presses a key), mouse or system clock (a circuit that generates pulses at precise intervals that are used to coordinate the computer's activities).
	www.bellevuelinux.org /user_mode.html (244 words)

	Debian Grimoire: UML
		Skas mode is much faster than normal tt mode, but requires a patch in the host's kernel.
		User Mode Linux createas a tmp file as big as the RAM you allocate the UML instance.
		To do this, boot your uml in single user mode and then edit guest:/etc/inittab and guest:/etc/fstab to be the non devfs form (ie ttys/0 becomes tty0, /dev/ubd/0 becomes /dev/ubd0, etc).
	deb.riseup.net /miscellaneous/uml (547 words)

	Port 25 : Honeypots and User-Mode-Linux (UML): Part 1
		The primary difference is that “User Mode Linux”, or UML is open source and (depending on your personal depth of knowledge of the Linux kernel) you can really tweak any and every aspect of the host and UML kernel to your liking.
		User Mode Linux is essentially an entire operating system running as a program in user space.
		Tun0 which is a tunneled interface to eth0, is used to negotiate traffic between the user mode kernel and the primary physical interface of the host machine.
	port25.technet.com /archive/2006/07/23/Honeypots-and-User_2D00_Mode_2D00_linux-_2800_UML_29003A00_-Part-1.aspx (1190 words)

	Single user mode definition by The Linux Information Project (LINFO)
		Single user mode, also referred to as maintenance mode and runlevel 1, is a mode of operation of a computer running Linux or another Unix-like operating system that provides as few services as possible and only minimal functionality.
		Among the administrative tasks for which single user mode is useful is using fsck to repair corrupted filesystems, such as /usr, which is often a separate partition (i.e., a logically independent section of a hard disk drive).
		Another use of single user mode is the situation in which a computer will boot up but will not allow the user to log in after the booting process has been completed.
	www.bellevuelinux.org /single_user_mode.html (512 words)

	Ring (computer security) - Wikipedia, the free encyclopedia
		For example, spyware running as a user program in Ring 1 should be prevented from turning on a web camera without informing the user, since hardware access should be a Ring0 function reserved for device drivers.
		In a monolithic kernel, the kernel runs in supervisor mode and the applications run in user mode.
		If a processor generates a fault or exception condition in a user mode, in most cases system stability is unaffected; if a processor generates a fault or exception condition in kernel mode, most operating systems will halt the system with an unrecoverable error.
	en.wikipedia.org /wiki/User_mode (1629 words)

	User Account Control Overview
		The main goal of User Account Control is to reduce the exposure and attack surface of the operating system by requiring that all users run in standard user mode.
		User Account Control-compliant software applications isolate privileges by design, reducing the attack surface of the operating system by reducing the general set of privileges and helping prevent unauthorized applications from running without the user's consent.
		The standard user account type will be a major change for many application developers, who will need to shift the way they write their applications and access certain shared system files and registry keys.
	technet.microsoft.com /en-us/windowsvista/aa906021.aspx (4141 words)

	The Unix Command Line: Single-User Mode
		Single-user mode starts you with an extremely minimal environment -- not only is the normal graphical interface not running, neither are most of the normal system daemons (init and mach-init are the only ones), and the boot disk isn't even fully mounted!
		For one thing, the default shell may be different (zsh under 10.0-10.2, bash under 10.3); unless you're extremely familiar with the peculiarities of your regular shell, you probably won't notice this (except that the shell prompt'll be different from normal).
		Also, the keyboard may not be fully configured in single-user mode, so the arrow keys don't work for command line editing (or in text editors, either); but you can use control characters (i.e.
	www.westwind.com /reference/OS-X/commandline/single-user.html (1425 words)

	User-Mode Linux Network (Site not responding. Last check: 2007-10-10)
		I wanted to work on allowing users to connect to consoles on their UML without requiring networking, but that is going to need a little hacking of UML to make that work.
		As the rootfs file is not written to, we can share it among lots of users, and anything they change will be written to their own personal COW file.
		While each user currently has a unique IP address for their UML, often this is not practical, particularly when the UML does not require incoming connections, or if no IPs are available for the user.
	uml.openconsultancy.com (10737 words)

	uiGarden.net - Weaving Usability and Cultures: Mode in User Interface Design
		An interface with “harmful” mode is considered to be acceptable if it can give immediate feedback to let the user perceive the undesired or wrong result, thus the user can take appropriate measures to correct the problem.
		So, the user may not be aware of keyboard’s “Caps Lock” mode until he finds what he has just typed are all upper case letters.
		He believes that a mode will interrupt people’s thinking and force them to care about extraneous factors which are irrelevant to their main task.
	www.uigarden.net /english/mode-in-user-interface-design (3298 words)

	User Mode Linux on SuSE
		It is hard to determine exactly which version of User Mode Linux is on the SuSE 9.2 DVD, or which patches it has, since the patch archive is not in the source RPM.
		The executing user will need to be able to write on the image files, except if copy on write is engaged, in which case he will need to be able to write on the copy but only to read the original.
		Include in the documentation of the other packages, a note that the user is encouraged to install yast2-uml, so as to drag in the kernel and all needed utilities, and then to use yast2-uml to set up his UML image.
	www.math.ucla.edu /~jimc/documents/uml-install-suse.html (9289 words)

	Channel And User Modes
		Channel modes can only be modified by channel operators, which are those who have a @ next to their nickname.
		It should be noted that, voiced users are considered as the friends of the ops and are often under watch.
		You can only change your own user modes: therefore, the nickname will always stand for the nick that you are using at the time.
	channels.dal.net /aditya/dalnet/chan-user-modes.html (1147 words)

	TIP Booting into single user mode - Gentoo Linux Wiki
		On gentoo, single user mode skips all the startup scripts from the 'default' runlevel, presenting you with a text login prompt and no networking.
		People familiar with other distributions may be a bit confused when they try to access single user mode.
		Single user mode on Gentoo does prompt for username and password, so this is not the answer for a lost root password.
	gentoo-wiki.com /TIP_Booting_into_single_user_mode (464 words)

	VA Assist - Super User Mode
		Super User mode is granted on a user by user basis by the Administrator through the "Manage Super Users" button on the "VA Assist
		Note: Once Super User status is invoked, it remains in effect for a specific workspace until it is turned off (even if the current user is changed for that workspace).
		If Super User mode is turned off while acting as a non-super-user-privileged user, it can't be turned on again until they change user back to a user that has the Super User privilege.
	www.instantiations.com /assist/docs/envy_super_user.htm (282 words)

	Prevent kernel rootkit installation under user mode? - Wilders Security Forums
		Of course running in user mode has limitations, but when needed, just switch back to the admin.
		User mode rootkit is explained in an article from viruslist.com at: http://www.viruslist.com/en/analysis?pubid=168740859
		According to this article, a user mode rootkit is easier to detect such as with RootKit Revealer and many other progs it refers to for detection.
	www.wilderssecurity.com /showthread.php?t=107811 (2021 words)

	Cisco Basics - User Exec Mode (Site not responding. Last check: 2007-10-10)
		Let's see what it looks like to be in each one of these modes.
		The easiest way to keep track of the mode you're in is by looking at the prompt.
		From this mode, we are able to get information like the version of
	www.netcolony.com /clifford/cisco_basics__user_exec_mode1.htm (441 words)

	User-Mode Linux Co-op
		None of the users on that system use it all that heavily - most use it as an email platform - but a few use it as a jumping off point for managing their own networks.
		If we had given each user their own copy of the root filesystem, the boot process would take about 21 times as long because every sector that needs to be read needs to be read from 21 separate roots.
		As I generally know and trust the users on the system, and given the fact that they can work independantly in their own UML's with few, if any, privacy or security concerns, there won't be strict policies.
	www.stearns.org /slartibartfast/uml-coop.current.html (8066 words)

	Slashdot \| User Mode Linux
		And this forms the basis for the 4th chapter of this book, "A second UML instance." In this chapter, one also gets a peep into setting up networking between two UML instances but all the advanced networking concepts are explained in a separate chapter of their own.
		User Mode Linux is a result-oriented book with stress given to accomplishing tasks rather than concentrating on theory alone.
		For example, my Web site is hosted by Linode.com [linode.com], which offers User Mode Linux-based servers for very low prices, which means you can have full root access without needing a dedicated server – not trying to get off topic or advertise or anything, just mentioning a very good example of the technology in use.
	rss.slashdot.org /Slashdot/slashdotBookReviews?m=106 (3336 words)

	Macintosh Security Site -> Mac OS X Single User Mode Root Access - CodeSamurai
		It is argued that Single User Mode should allow full root privileges to allow forgetful users to change their password.
		Besides, the sysadmins and power users (who might like the CLI more so than the average user) probably won't forget their passwords and would also prefer the security advantage of not having root open as such.
		Somebody's at a Mac running Mac OS X, and they've completely forgotten their user and/or administrative account password on it (or even worse, they never had an account to begin with and are trying to hack the system), so they can't just login at the login screen.
	www.securemac.com /macosxsingleuser.php (955 words)

	User Mode Drivers \| Linux Journal
		This is a short article on writing user-mode device drivers to penetrate the abstraction layer from a user application and to determine where a PCI card is located.
		The other reason is that arguably, more powerful addressing modes allow faster and more flexible methods of accessing the memory.
		A device's address is found by comparing its jumpers and a table in a user's guide.
	www.linuxjournal.com /article/5442 (1398 words)

	Booting into Single-User Mode
		One of the advantages of single-user mode is that you do not need a boot CD-ROM; however, it does not give you the option to mount the file systems as read-only or not mount them at all.
		Do not use single-user mode if your file system cannot be mounted successfully.
		You cannot use single-user mode if the runlevel 1 configuration on your system is corrupted.
	www.redhat.com /docs/manuals/enterprise/RHEL-4-Manual/sysadmin-guide/s1-rescuemode-booting-single.html (192 words)

	UserLevelDrivers - IA64wiki (Site not responding. Last check: 2007-10-10)
		By moving device drivers out of privileged kernel space into user space, their bugs can be contained.
		New infrastructure is needed for allowing a user process to register interest in an (unshared) interrupt, and receive notification when it happens.
		Sharing interrupts is extremely inadvisable if they are to be handled in user space: a user-space handler may never return, so the interrupt has to be disabled and marked as handled before calling userspace.
	www.gelato.unsw.edu.au /IA64wiki/UserLevelDrivers (687 words)

	Debian -- usermode
		Userinfo allows users to change their finger information.
		Usermount lets users mount, unmount, and format filesystems.
		Install the usermode package if you would like to provide users with graphical tools for certain account management tasks.
	packages.debian.org /unstable/x11/usermode (128 words)

	HOWTO User Mode Linux - Gentoo Linux Wiki
		User mode linux allows you to run an almost completely self contained linux system as a process inside a host linux system.
		The uml/systems folder should be owned by whatever user you want to run your umls under.
		One of the most confusing things that new UML users have to deal with is the annoying problem of there being no login console when a gentoo system boots inside a UML.
	gentoo-wiki.com /HOWTO_User_Mode_Linux (3832 words)

	Single User Mode. (Site not responding. Last check: 2007-10-10)
		When brought up in single user mode only the root file system is mounted and the system will only allow a single login from the console.
		Single user mode is useful when you are diagnosing hardware problems on disk drives, backing up file systems, restore file systems, or installing software (such as the OS).
		A common activity in single user mode is to use the command
	userpages.umbc.edu /~jack/ifsm498d/single-user.html (276 words)

	Know Your Enemy: Learning with User-Mode Linux
		Many users or organization that want to research Honeynets may not have the resources for deployments.
		skas Mode: UML was recently reworked to allow it to run in a mode in which the UML kernel is in a totally separate host address space from its processes.
		If you are using your gateway in bridging mode, this variable will also be used, however you give it the real IP's of the honeypots, as there is no address translation.
	www.honeynet.org /papers/uml (3374 words)

	User-Mode Audio Components
		In exclusive mode, the client can choose to open the stream in any audio format that the endpoint device supports.
		In shared mode, the client must open the stream in the mix format that is currently in use by the audio engine (or a format that is similar to the mix format).
		For exclusive mode, the endpoint buffer resides in memory that is accessible to both the application and the audio hardware.
	msdn2.microsoft.com /en-us/library/ms679160.aspx (1362 words)

	Blue Screen When Closing Kernel Mode Handles from User Mode
		User mode programs that close a handle that was opened up by a kernel mode component may cause a blue screen error message.
		A user mode application has no way of knowing who closed the handle.
		A user mode application should never close a handle opened by that application in kernel mode.
	support.microsoft.com /support/kb/articles/q160/6/50.asp (207 words)

	FAQ: User-Mode Driver Framework
		However, you might be able to split your driver so that part of it runs in kernel mode and part of it runs in user mode.
		Although the printer driver architecture was developed long before UMDF, moving printer drivers from kernel mode to user mode resulted in significant improvements in stability and reliability.
		Before printer drivers moved to user mode (with the release of Windows 2000), they were the primary cause of Driver Development Kit (DDK) support calls and one of the top five reasons for calls to Microsoft Customer Service and Support (PSS).
	www.microsoft.com /whdc/driver/wdf/UMDF_FAQ.mspx (1452 words)

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