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Index: U

U (undo) command
Learning the vi Editor, 2.3.5.4. Problems with deletions
Learning the vi Editor, 2.3.8.2. Undo
\u metacharacter: Learning the vi Editor, 6.3.3. Metacharacters Used in Replacement Strings
-u option (vim)
Learning the vi Editor, 11.2. Important Command-Line Arguments
Learning the vi Editor, 11.4.1. Initialization for All vim Invocations
UIDs: (see user IDs)
ul command: UNIX Power Tools, 43.18. How nroff Makes Bold and Underline; How to Remove It
ulimit
UNIX in a Nutshell, Chapter 4, Reference: ulimit
Learning the Korn Shell, 10.2.2. ulimit
Learning the Korn Shell, A.1. The Bourne Shell
hard vs. soft limits: Learning the Korn Shell, 10.2.2. ulimit
options
-a (print all limits): Learning the Korn Shell, 10.2.2. ulimit
-c (core file size): Learning the Korn Shell, 10.2.2. ulimit
-d (process data segment): Learning the Korn Shell, 10.2.2. ulimit
-f (file size):
UNIX Power Tools, 24.5. Limiting File Sizes
Learning the Korn Shell, 10.2.2. ulimit
-n (file descriptors): Learning the Korn Shell, 10.2.2. ulimit
-s (process stack segment): Learning the Korn Shell, 10.2.2. ulimit
-t (process CPU time): Learning the Korn Shell, 10.2.2. ulimit
-v (virtual memory): Learning the Korn Shell, 10.2.2. ulimit
privileged (superuser) options to: Learning the Korn Shell, 10.2.2. ulimit
removing limits: Learning the Korn Shell, 10.2.2. ulimit
Ultrix
Learning the Korn Shell, 1. Korn Shell Basics
Learning the Korn Shell, 1.3. History of UNIX Shells
Learning the Korn Shell, 1.9.5. Control Keys
umask command
(see also chmod command)
Learning the Korn Shell, 10.2.1. umask
Learning the Korn Shell, A.6. Workalikes on PC Platforms
Learning the UNIX Operating System, 3.6. Customizing Your Account
UNIX in a Nutshell, Chapter 2, Reference: umask
UNIX in a Nutshell, Chapter 4, Reference: umask
UNIX in a Nutshell, Chapter 5, Reference: umask
UNIX Power Tools, 14.14. Automatic Setup When You Enter/Exit a Directory
UNIX Power Tools, 22.2.1. User, Group, and World
UNIX Power Tools, 22.4. Setting an Exact umask
UNIX Power Tools, 45.36. Shell Lockfile
as logical XOR with file permission: Learning the Korn Shell, 10.2.1. umask
setting in shell scripts: UNIX Power Tools, 38.4. Subshells
umask value: UNIX Power Tools, 52.5.3.3. Running Install
unabbreviate command (ex): UNIX in a Nutshell, Chapter 9, Reference: unabbreviate
unalias command
Learning the Korn Shell, 3.2.1. Tracked Aliases
UNIX in a Nutshell, Chapter 4, Reference: unalias
UNIX in a Nutshell, Chapter 5, Reference: unalias
uname command
UNIX in a Nutshell, Chapter 2, Reference: uname
UNIX Power Tools, 50.7. How UNIX Systems Remember Their Name
UNIX Power Tools, 52.4. Quick Descriptions of What's on the Disc
unarchiving: (see archives)
uncluttering logins: UNIX Power Tools, 2.15. Unclutter Logins: Show Login Messages Just Once
uncompress command
Learning the Korn Shell, 1.8. Background Jobs
UNIX in a Nutshell, Chapter 2, Reference: uncompress
UNIX Power Tools, 52.8.1.1. Missing Programs
UNIX Power Tools, 52.8.2.2. Uncompressing the Sources
uncompressing files
UNIX in a Nutshell, Chapter 2, Reference: uncompress
UNIX in a Nutshell, Chapter 2, Reference: zcat
undelete program: UNIX Power Tools, 52.4. Quick Descriptions of What's on the Disc
underlined text: UNIX Power Tools, 43.18. How nroff Makes Bold and Underline; How to Remove It
underscore (_) in filenames: UNIX Power Tools, 1.15. Filenames
undo command (ex): UNIX in a Nutshell, Chapter 9, Reference: undo
undoing: Learning the vi Editor, 2.3.8.2. Undo
infinitely (vi clones): Learning the vi Editor, 8.6.3. Infinite Undo
elvis editor: Learning the vi Editor, 10.8.3. Infinite Undo
nvi editor: Learning the vi Editor, 9.8.3. Infinite Undo
vile editor: Learning the vi Editor, 12.8.3. Infinite Undo
vim editor: Learning the vi Editor, 11.8.3. Infinite Undo
recovering deletions
Learning the vi Editor, 2.3.5.4. Problems with deletions
Learning the vi Editor, 4.3.1. Recovering Deletions
text deletions: Learning the vi Editor, 2.3.5.4. Problems with deletions
undoing (vi editor)
UNIX Power Tools, 30.8. Get Back What You Deleted with Numbered Buffers
UNIX Power Tools, 30.10. Confirming Substitutions in ex and vi
UNIX Power Tools, 30.38. Finding Your Place with Undo
undoing, emacs commands for: UNIX in a Nutshell, 7.2.5. Stopping and Undoing Commands
undolevels option (elvis): Learning the vi Editor, 10.8.3. Infinite Undo
undolevels option (vim): Learning the vi Editor, 11.8.3. Infinite Undo
undolimit option (vile): Learning the vi Editor, 12.8.3. Infinite Undo
unedit command (SCCS): UNIX Power Tools, 20.13. SCCS Basics
unedit pseudo-command (sccs): UNIX in a Nutshell, 18.7.2. Pseudo-Commands
unexpand command
UNIX in a Nutshell, Chapter 2, Reference: unexpand
UNIX Power Tools, 41.4.1. TAB Is Just Another Character to UNIX
UNIX Power Tools, 52.4. Quick Descriptions of What's on the Disc
filtering within vi: UNIX Power Tools, 31.5. Keymaps for Pasting into a Window Running vi
unexpand script: UNIX Power Tools, 24.6. Save Space with Tab Characters
unget command (SCCS): UNIX in a Nutshell, Chapter 18, Reference: unget
unhash command: UNIX in a Nutshell, Chapter 5, Reference: unhash
Unicode character set
converting files to: UNIX in a Nutshell, Chapter 2, Reference: native2ascii
union metacharacter, lack of: sed & awk, 3.2.9. Alternative Operations
union of regular expressions
sed & awk, 3.2. A Line-Up of Characters
sed & awk, 3.2.9. Alternative Operations
uniq command
UNIX in a Nutshell, Chapter 2, Reference: uniq
UNIX Power Tools, 35.20. Quick Reference: uniq
UNIX Power Tools, 50.3. apropos on Systems Without apropos
units command: UNIX in a Nutshell, Chapter 2, Reference: units
units of measurements (nroff/troff): UNIX in a Nutshell, 12.3.3. Specifying Measurements
UNIX
accessing other platforms: Learning the UNIX Operating System, 4.4.6. Files on Other Operating Systems
advantages
UNIX Power Tools, 1.1. What's Special About UNIX?
UNIX Power Tools, 1.7. Power Grows on You
UNIX Power Tools, 1.26. What a Multiuser System Can Do for You
UNIX Power Tools, 44.1. Everyone Should Learn Some Shell Programming
UNIX Power Tools, 52.3. Shrink-Wrapped Software for UNIX
binary programs: UNIX Power Tools, 52.8.2. Compiling Source Code
commands: Learning the Korn Shell, C.4. UUCP
executing: Learning the vi Editor, 7.2. Executing UNIX Commands
list: UNIX in a Nutshell, 2.1. Alphabetical Summary of Commands
command reference: Learning the UNIX Operating System, B.1. Commands and Their Meanings
Command Syntax Standard Rules: Learning the Korn Shell, 6.1.3. getopts
definition of priority: UNIX Power Tools, 39.9. Know When to Be "nice" to OTher Users...and When
documentation conventions: Learning the Korn Shell, 4.3.1. Syntax of String Operators
documentation on: Learning the UNIX Operating System, 7.1. Standard UNIX Documentation
drawbacks of: UNIX Power Tools, 1.34. What's Wrong with UNIX
environment: Learning the UNIX Operating System, 1.1. Working in the UNIX Environment
filenames in BSD: Learning the Korn Shell, 7.2.2.3. Code blocks
filenames in System V
Learning the Korn Shell, 6.3.3. String Formatting Options
Learning the Korn Shell, 7.2.2.3. Code blocks
flexible handling of TAB characters: UNIX Power Tools, 41.4. How UNIX Handles TAB Characters
identifying versions: UNIX Power Tools, 50.8. Which Version Am I Using?
interprocess communication in: Learning the Korn Shell, 8.3. Signals
networking and communications utilities: UNIX Power Tools, 1.33. UNIX Networking and Communications
platforms: UNIX Power Tools, 52.3. Shrink-Wrapped Software for UNIX
Programmer's Manual
Learning the Korn Shell, 8. Process Handling
Learning the Korn Shell, 8.3.3.2. BSD
references for: Learning the UNIX Operating System, A.1. General UNIX Books
security : (see security)
shell history: Learning the Korn Shell, 1.3. History of UNIX Shells
starting X from: Learning the UNIX Operating System, 2.2.2. B. Starting X from a Standard UNIX Session
terminal interface
Learning the Korn Shell, 2. Command-line Editing
Learning the Korn Shell, 2.3.4. Moving Around in the History File
Learning the Korn Shell, 2.3.6. Miscellaneous Commands
Learning the Korn Shell, 2.4. Vi Editing Mode
time on: UNIX Power Tools, 39.1. Which Time Is It?
two main branches of: UNIX Power Tools, 41.2.1. How We Made It This Far (Back?)
utilities: Learning the Korn Shell, 1.7.1. Standard I/O
versions
A/UX
Learning the Korn Shell, 1. Korn Shell Basics
Learning the Korn Shell, 1.9.5. Control Keys
AIX
Learning the Korn Shell, 1. Korn Shell Basics
Learning the Korn Shell, 8.3.3. ps
BSD
Learning the Korn Shell, 1.3. History of UNIX Shells
Learning the Korn Shell, 1.9.5. Control Keys
Learning the Korn Shell, 2.3.4. Moving Around in the History File
Learning the Korn Shell, 2.3.6. Miscellaneous Commands
Learning the Korn Shell, 2.4. Vi Editing Mode
Learning the Korn Shell, 3.4. Shell Variables
Learning the Korn Shell, 3.4.2.2. Mail Variables
Learning the Korn Shell, 4.4. Command Substitution
Learning the Korn Shell, 7.2.2.3. Code blocks
Learning the Korn Shell, 8.3. Signals
Learning the Korn Shell, 8.3.3. ps
Learning the Korn Shell, 8.3.3.2. BSD
Learning the Korn Shell, 9.2.3.3. Breakpoints
Learning the Korn Shell, A.2. The IEEE 1003.2 POSIX Shell Standard
Learning the Korn Shell, A.4. pdksh
HP/UX
Learning the Korn Shell, 1. Korn Shell Basics
Learning the Korn Shell, 1.9.5. Control Keys
Learning the Korn Shell, 8.3.3. ps
SCO: Learning the Korn Shell, 1.9.5. Control Keys
SunOS
Learning the Korn Shell, 1. Korn Shell Basics
Learning the Korn Shell, 1.3. History of UNIX Shells
Learning the Korn Shell, 1.9.5. Control Keys
Learning the Korn Shell, 4.4. Command Substitution
Learning the Korn Shell, 8.3.3. ps
Learning the Korn Shell, A.1. The Bourne Shell
Learning the Korn Shell, A.3. wksh
Learning the Korn Shell, A.4. pdksh
System III
Learning the Korn Shell, 1.9.5. Control Keys
Learning the Korn Shell, 8.2. Job Control
System V
Learning the Korn Shell, 1.9.5. Control Keys
Learning the Korn Shell, 3.4. Shell Variables
Learning the Korn Shell, 3.4.2.4. Terminal Types
Learning the Korn Shell, 6.3.3. String Formatting Options
Learning the Korn Shell, 7.2.2.3. Code blocks
Learning the Korn Shell, 8.2. Job Control
Learning the Korn Shell, 8.3. Signals
Learning the Korn Shell, 8.3.3. ps
Learning the Korn Shell, 9.2.3.3. Breakpoints
Learning the Korn Shell, A.2. The IEEE 1003.2 POSIX Shell Standard
System V Release 4
Learning the Korn Shell, Korn Shell Versions
Learning the Korn Shell, 1.3.1. The Korn Shell
Learning the Korn Shell, 1.4. Getting the Korn Shell
Learning the Korn Shell, 6.1.3.1. More About C Compilers
Learning the Korn Shell, A.3. wksh
that don't support job control: Learning the Korn Shell, 8.2. Job Control
Ultrix
Learning the Korn Shell, 1. Korn Shell Basics
Learning the Korn Shell, 1.3. History of UNIX Shells
Learning the Korn Shell, 1.9.5. Control Keys
Learning the Korn Shell, 8.3.3. ps
UTS: Learning the Korn Shell, 1. Korn Shell Basics
Version 6: Learning the Korn Shell, 4.3.2. Patterns and Regular Expressions
Version 7
Learning the Korn Shell, 1.3. History of UNIX Shells
Learning the Korn Shell, A.1. The Bourne Shell
Learning the Korn Shell, A.2. The IEEE 1003.2 POSIX Shell Standard
Learning the Korn Shell, A.4. pdksh
Xenix
Learning the Korn Shell, 1. Korn Shell Basics
Learning the Korn Shell, 1.9.5. Control Keys
Learning the Korn Shell, 8.2. Job Control
versions of
Learning the UNIX Operating System, Versions of UNIX
UNIX Power Tools, About UNIX Versions
workalikes
Coherent: Learning the Korn Shell, A.6. Workalikes on PC Platforms
Minix: Learning the Korn Shell, A.6. Workalikes on PC Platforms
xterm windows for: Learning the UNIX Operating System, 2.3.2. The xterm Window
xterm windows on: Learning the UNIX Operating System, 2.4.3. Using a Mouse with xterm Windows
UNIX System Laboratories (USL)
Learning the Korn Shell, 1.3.1. The Korn Shell
Learning the Korn Shell, A.3. wksh
Learning the Korn Shell, A.7. The Future of the Korn Shell
address and phone number: Learning the Korn Shell, A.3. wksh
unix2dos command: UNIX in a Nutshell, Chapter 2, Reference: unix2dos
unkillable processes, cleaning up: UNIX Power Tools, 38.15. Cleaning Up an Unkillable Process
"Unknown terminal type" message: Learning the vi Editor, 1.1.2. Problems Opening Files
unlimit command: UNIX in a Nutshell, Chapter 5, Reference: unlimit
unlimit coredumpsize command: UNIX Power Tools, 24.5. Limiting File Sizes
unlink command: UNIX Power Tools, 23.15. Using unlink to Remove a File with a Strange Name
unlinking files: UNIX Power Tools, 24.3. Unlinking Open Files Isn't a Good Idea
unmap command (ex): UNIX in a Nutshell, Chapter 9, Reference: unmap
unpack command: (see also pack command; pcat command)
unprintable characters: (see special characters)
codes for writing: UNIX Power Tools, 41.11.1. Special Character Codes
unprintable files: UNIX Power Tools, 25.5. Page Through Compressed, RCS, Unprintable Files
unset, in POSIX shell: Learning the Korn Shell, A.2. The IEEE 1003.2 POSIX Shell Standard
unset (ksh): UNIX in a Nutshell, Chapter 4, Reference: unset
unset (sh): UNIX in a Nutshell, Chapter 4, Reference: unset
unset command (csh): UNIX in a Nutshell, Chapter 5, Reference: unset
unset variable errors: UNIX Power Tools, 40.4. Choosing the Shell Run (We Hope) by at
unsetenv command
UNIX in a Nutshell, Chapter 5, Reference: unsetenv
UNIX Power Tools, 6.1. What Environment Variables Are Good For
unshar program
UNIX Power Tools, 19.3. unshar: Unarchive a Shell Archive
UNIX Power Tools, 52.4. Quick Descriptions of What's on the Disc
UNIX Power Tools, 52.8.1.1. Missing Programs
UNIX Power Tools, 52.8.2.4. Unsharring the Sources
unshar software: UNIX Power Tools, 52.8.2.4. Unsharring the Sources
untarring software: UNIX Power Tools, 52.8.2.3. Untarring the Sources
unterrupt characters: UNIX Power Tools, 5.9. Setting Your Erase, Kill, and Interrupt Characters
until
UNIX in a Nutshell, Chapter 4, Reference: until
Learning the Korn Shell, 5.4. select
Learning the Korn Shell, 5.5. while and until
differences with while: Learning the Korn Shell, 5.5. while and until
redirecting I/O to: Learning the Korn Shell, 7.2.2.2. I/O Redirection and multiple commands
syntax: Learning the Korn Shell, 5.5. while and until
until loops: UNIX Power Tools, 44.10.1. Looping Until a Command Succeeds
examples: UNIX Power Tools, 44.10.1. Looping Until a Command Succeeds
in Bourne shells: UNIX Power Tools, 44.10.1. Looping Until a Command Succeeds
while loops compared to: UNIX Power Tools, 44.10.2. Looping Until a Command Fails
unzip command: UNIX in a Nutshell, Chapter 2, Reference: unzip
updateb script: UNIX Power Tools, 17.19. Finding Files (Much) Faster with a find Database
updatecount option (vim): Learning the vi Editor, 11.4.1. Initialization for All vim Invocations
upper character class: UNIX in a Nutshell, 4.2.2. Filename Metacharacters
uppercase
(see also capitalization, case)
pathname in: UNIX Power Tools, 52.5.3.4. Installing a Single Program
without CAPS LOCK: UNIX Power Tools, 31.11. Typing in Uppercase Without CAPS LOCK
converting to lowercase
Learning the vi Editor, 2.3.4. Changing Case
Learning the vi Editor, 6.3.3. Metacharacters Used in Replacement Strings
uptime command
UNIX in a Nutshell, Chapter 2, Reference: uptime
UNIX Power Tools, 39.7. Checking System Load: uptime
average reported by: UNIX Power Tools, 39.12.1. The CPU
usage information
UNIX in a Nutshell, Chapter 2, Reference: time
UNIX in a Nutshell, Chapter 2, Reference: timex
UNIX in a Nutshell, Chapter 2, Reference: w
usage information (disks): UNIX in a Nutshell, Chapter 2, Reference: du
USENET
comp.binaries.os2 newsgroup: Learning the Korn Shell, A.6. Workalikes on PC Platforms
comp.sources.unix newsgroup: Learning the Korn Shell, A.4. pdksh
$USER
examples: UNIX Power Tools, 48.4.3. Automating Your Own Calendar
user dictionaries: (see dictionary files)
USER environment variable
UNIX in a Nutshell, 5.3.5. Environment Variables
UNIX Power Tools, 6.3. Predefined Environment Variables
UNIX Power Tools, 6.9. Special C Shell Variables
in C shell: UNIX Power Tools, 47.2.5. Variable Syntax
user IDs (UIDs): UNIX Power Tools, 38.3. Managing Processes: Overall Concepts
file access: UNIX Power Tools, 1.23. File Access Permissions
user shell variable: UNIX in a Nutshell, 5.3.3. Predefined Shell Variables
user time
UNIX Power Tools, 39.2. Timing Programs
UNIX Power Tools, 39.5. Why Is the System So Slow?
user's login shell, killing: UNIX Power Tools, 38.10. Destroying Processes with kill
user-controlled multitasking: Learning the Korn Shell, 8. Process Handling
user-defined functions: sed & awk, 9.3. Writing Your Own Functions
user-defined signal: (see USR1 (user-defined) signal)
user-state CPU time: UNIX Power Tools, 39.5. Why Is the System So Slow?
username field in crontab entries: UNIX Power Tools, 40.12.1. Execution Scheduling
usernames, mailing to: Learning the UNIX Operating System, 3.4.1. Sending Mail
users
(see also groups)
UNIX Power Tools, 17.16. Searching by Owner and Group
classes of: UNIX Power Tools, 39.12.4. User Communities
displaying data about: UNIX in a Nutshell, Chapter 2, Reference: finger
displaying group membership: UNIX in a Nutshell, Chapter 2, Reference: groups
effect on system performance: UNIX Power Tools, 39.12.4. User Communities
IDs
displaying: UNIX in a Nutshell, Chapter 2, Reference: id
information on those logged in: UNIX in a Nutshell, Chapter 2, Reference: w
listing: UNIX in a Nutshell, Chapter 2, Reference: listusers
logged-in
displaying list
UNIX in a Nutshell, Chapter 2, Reference: users
UNIX in a Nutshell, Chapter 2, Reference: who
ownership: (see ownership, file)
permissions
changing: UNIX in a Nutshell, Chapter 2, Reference: mesg
SUID bit
UNIX Power Tools, 1.23. File Access Permissions
UNIX Power Tools, 1.25. Access to Directories
usernames, printing: UNIX in a Nutshell, Chapter 2, Reference: whoami
who command for
Learning the UNIX Operating System, 1.1.6.2. who
Learning the UNIX Operating System, 5.1.1.1. The > operator
users command: UNIX in a Nutshell, Chapter 2, Reference: users
/usr directory
/usr/bin directory
Learning the Korn Shell, 3.4.2.5. Command Search Path
Learning the Korn Shell, 10.3.2. A System Break-in Scenario
in search paths: UNIX Power Tools, 44.3.4. Shell Search Paths
programs in: UNIX Power Tools, 1.10. Internal and External Commands
/usr/ccs/bin directory: UNIX in a Nutshell, 2. Unix Commands
/usr/dt/bin directory: UNIX in a Nutshell, 2. Unix Commands
/usr/include, header files in: UNIX Power Tools, 52.8.2.7. Functions, Libraries, and Header Files
/usr/java/bin directory: UNIX in a Nutshell, 2. Unix Commands
/usr/lib: Learning the Korn Shell, 9.2.1.1. The driver script
/usr/lib/crontab file: UNIX Power Tools, 40.12.1. Execution Scheduling
/usr/lib/crontab.local file: UNIX Power Tools, 40.12.1. Execution Scheduling
/usr/local directory: UNIX Power Tools, 52.5.3.5. Installing Everything Using the Defaults
/usr/openwin/bin directory: UNIX in a Nutshell, 2. Unix Commands
/usr/tmp
Learning the Korn Shell, 8.4.2. Process ID Variables and Temporary Files
Learning the vi Editor, 1.2.1. Problems Saving Files
UNIX Power Tools, 21.4. Why Both /tmp and /usr/tmp?
/usr/ucb directory
UNIX in a Nutshell, 2. Unix Commands
UNIX in a Nutshell, 1.5. Guide for Users of BSD-Derived Systems
USR1 (user-defined) signal: UNIX Power Tools, 38.8. What Are Signals?
utilities, combining: UNIX Power Tools, 44.1. Everyone Should Learn Some Shell Programming
UTS: Learning the Korn Shell, 1. Korn Shell Basics
UUCP: sed & awk, UUCP
UUCP (UNIX-to-UNIX copy)
UNIX Power Tools, 1.33. UNIX Networking and Communications
UNIX Power Tools, 52.7.2.3. UUCP
uucp command
Learning the Korn Shell, C.4. UUCP
(see also uustat command)
uudecode command
UNIX in a Nutshell, Chapter 2, Reference: uudecode
UNIX Power Tools, 19.5. Using tar to Create and Unpack Archives
uuencode command
UNIX in a Nutshell, Chapter 2, Reference: uuencode
UNIX Power Tools, 19.5. Using tar to Create and Unpack Archives
uuencoded files: UNIX Power Tools, 11.3. My Favorite Is !$
uulog command: (see also tail command)
uuname command: (see also uucp command)
UUNET: UNIX Power Tools, 52.7.2.3. UUCP
uupick command: (see also uuto command)
uustat command: (see also uucp command)
uuto command: (see also uupick command)
uutot.awk script (example): sed & awk, 13.1. uutot.awk - Report UUCP Statistics


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