Keywords - U
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- uc_tz_t
 
- 
			·
			Caveats ·
 
- UDF (Universal Disk Format) filesystem
 
- 
			·
			Filename rules ·
			UDF filesystem ·
			Universal Disk Format (UDF) filesystem ·
 
- UDMA (Ultra Direct Memory Access)
 
- 
			·
			EIDE ·
			Troubleshooting for devb-eide ·
 
- UHCI (Universal Host Controller Interface)
 
- 
			·
			USB devices ·
 
- ulimit
 
- 
			·
			File descriptors ·
 
- Ultra Direct Memory Access
 
- 
		See
		UDMA 
 
- umask
 
- 
			·
			/etc/profile ·
			Default file permissions ·
 
- umount
 
- 
			·
			Mounting and unmounting filesystems ·
			Starting the network manager, protocols, and drivers ·
 
- uname
 
- 
			·
			UNIX ·
 
- undeleting a zapped file
 
- 
			·
			Recovering a zapped file ·
 
- Unicode
 
- 
	
	- filenames
 
	- 
			·
			Filename rules ·
	
 
	
	
	- typing
 
	- 
			·
			ped ·
	
 
	
 
- unions, directory
 
- 
			·
			Pathname-space mapping ·
 
- Universal Disk Format (UDF) filesystem
 
- 
			·
			CD-ROMs and DVDs ·
			Filename rules ·
			UDF filesystem ·
			Universal Disk Format (UDF) filesystem ·
 
- Universal Host Controller Interface
 
- 
		See
		UHCI 
 
- Universal Serial Bus
 
- 
		See
		USB 
 
- UNIX, compared to Neutrino
 
- 
			·
			UNIX ·
 
- unlink()
 
- 
			·
			Symbolic links ·
 
- unnamed semaphores
 
- 
	
	- limits
 
	- 
			·
			Synchronization primitives ·
	
 
	
 
- Unshielded Twisted Pair
 
- 
		See
		UTP 
 
- up arrow
 
- 
			·
			History: recalling commands ·
			The keyboard at a glance ·
 
- update (CVS command)
 
- 
			·
			Removing and restoring files ·
 
- usage messages
 
- 
			·
			Displaying online usage messages ·
			Filename extensions ·
 
- usb
 
- 
			·
			USB devices ·
 
- USB (Universal Serial Bus)
 
- 
			·
			USB devices ·
	
	- mass-storage devices
 
	- 
			·
			Fine-tuning USB storage devices ·
			Mass-storage devices ·
	
 
	
	
	- printers
 
	- 
		
		- connecting
 
		- 
			·
			Printers ·
		
 
		
		
		- lpr and /etc/printcap
 
		- 
			·
			USB printer ·
		
 
		
		
		- spooler
 
		- 
			·
			Printing on a USB printer ·
		
 
		
	 
	
 
- use (command)
 
- 
			·
			Displaying online usage messages ·
			Troubleshooting ·
			UNIX ·
 
- use (file extension)
 
- 
			·
			Filename extensions ·
 
- useqnet
 
- 
			·
			/etc ·
			/etc/system/sysinit ·
			Creating useqnet ·
 
- USERNAME (DOS variable)
 
- 
			·
			MS-DOS local command-interpreter variables ·
 
- users
 
- 
	
	- accounts
 
	- 
		
		- managing
 
		- 
			·
			Managing other accounts ·
		
 
		
		
		- reading /etc/passwd
 
		- 
			·
			Account database ·
		
 
		
		
		- troubleshooting
 
		- 
			·
			Troubleshooting ·
		
 
		
	 
	
	
	- adding
 
	- 
			·
			Adding users ·
	
 
	
	
	- embedded systems
 
	- 
			·
			Managing User Accounts ·
	
 
	
	
	- IDs
 
	- 
			·
			User accounts vs user IDs: login, lookup, and permissions ·
			What does a user account do? ·
		
		- assigning
 
		- 
			·
			Adding users ·
		
 
		
	 
	
	
	- name, login
 
	- 
			·
			Adding users ·
			User accounts vs user IDs: login, lookup, and permissions ·
			What does a user account do? ·
	
 
	
	
	- name, real
 
	- 
			·
			/etc/passwd ·
			Adding users ·
	
 
	
	
	- removing
 
	- 
			·
			Removing accounts ·
	
 
	
	
	- root
 
	- 
			·
			User accounts vs user IDs: login, lookup, and permissions ·
	
 
	
	
	- running programs as a specific
 
	- 
			·
			Setuid and setgid ·
			The first line ·
	
 
	
	
	- trusted
 
	- 
			·
			Running the Internet daemons ·
	
 
	
 
- usr
 
- 
			·
			/usr ·
 
- UTC (Coordinated Universal Time)
 
- 
			·
			/etc/system/sysinit ·
			Setting the time zone ·
	
	- hardware clock
 
	- 
			·
			/etc/system/sysinit ·
			Troubleshooting ·
	
 
	
 
- UTF-8
 
- 
	
	- filenames
 
	- 
			·
			Filename rules ·
	
 
	
	
	- typing
 
	- 
			·
			ped ·
	
 
	
 
- utilities
 
- 
	
	- basic
 
	- 
			·
			Basic commands ·
	
 
	
	
	- documentation
 
	- 
			·
			/usr ·
	
 
	
	
	- DOS, equivalents for
 
	- 
			·
			DOS commands and their Neutrino equivalents ·
	
 
	
	
	- location of
 
	- 
			·
			/bin ·
			/sbin ·
			/usr ·
	
 
	
	
	- logging information about users
 
	- 
			·
			Account database ·
	
 
	
	
	- names, completing
 
	- 
			·
			Command and filename completion ·
	
 
	
	
	- remote execution
 
	- 
			·
			Executing commands on another node or tty ·
	
 
	
	
	- syntax conventions
 
	- 
			·
			Understanding command syntax ·
	
 
	
	
	- usage messages
 
	- 
			·
			Displaying online usage messages ·
	
 
	
 
- UTP (Unshielded Twisted Pair)
 
- 
			·
			Active Interface Type ·
 
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