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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