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Index: U
- UIDs
: (see user IDs)
- ul command : 43.18. How nroff Makes Bold and Underline; How to Remove It
- ulimit -f command : 24.5. Limiting File Sizes
- umask command
- ul command : 43.18. How nroff Makes Bold and Underline; How to Remove It
- umask value
: 52.5.3.3. Running Install
- uname command
- unarchiving
: (see archives)
- uncluttering logins : 2.15. Unclutter Logins: Show Login Messages Just Once
- uncompress command
- uncluttering logins : 2.15. Unclutter Logins: Show Login Messages Just Once
- undelete program
: 52.4. Quick Descriptions of What's on the Disc
- underlined text : 43.18. How nroff Makes Bold and Underline; How to Remove It
- underscore (_) in filenames : 1.15. Filenames
- undoing (vi editor)
- underlined text : 43.18. How nroff Makes Bold and Underline; How to Remove It
- unedit command (SCCS)
: 20.13. SCCS Basics
- unexpand command
- unexpand script
: 24.6. Save Space with Tab Characters
- uniq command
- UNIX
- advantages
- binary programs
: 52.8.2. Compiling Source Code
- definition of priority : 39.9. Know When to Be "nice" to OTher Users...and When
- drawbacks of : 1.34. What's Wrong with UNIX
- flexible handling of TAB characters : 41.4. How UNIX Handles TAB Characters
- identifying versions : 50.8. Which Version Am I Using?
- networking and communications utilities : 1.33. UNIX Networking and Communications
- platforms : 52.3. Shrink-Wrapped Software for UNIX
- time on : 39.1. Which Time Is It?
- two main branches of : 41.2.1. How We Made It This Far (Back?)
- versions of : About UNIX Versions
- definition of priority : 39.9. Know When to Be "nice" to OTher Users...and When
- unkillable processes, cleaning up
: 38.15. Cleaning Up an Unkillable Process
- unlimit coredumpsize command : 24.5. Limiting File Sizes
- unlink command : 23.15. Using unlink to Remove a File with a Strange Name
- unlinking files : 24.3. Unlinking Open Files Isn't a Good Idea
- unprintable characters : (see special characters)
- unlimit coredumpsize command : 24.5. Limiting File Sizes
- codes for writing : 41.11.1. Special Character Codes
- unprintable files
: 25.5. Page Through Compressed, RCS, Unprintable Files
- unset variable errors : 40.4. Choosing the Shell Run (We Hope) by at
- unsetenv command : 6.1. What Environment Variables Are Good For
- unshar program
- unset variable errors : 40.4. Choosing the Shell Run (We Hope) by at
- unshar software
: 52.8.2.4. Unsharring the Sources
- untarring software : 52.8.2.3. Untarring the Sources
- unterrupt characters : 5.9. Setting Your Erase, Kill, and Interrupt Characters
- until loops : 44.10.1. Looping Until a Command Succeeds
- untarring software : 52.8.2.3. Untarring the Sources
- in Bourne shells
: 44.10.1. Looping Until a Command Succeeds
- examples : 44.10.1. Looping Until a Command Succeeds
- while loops compared to : 44.10.2. Looping Until a Command Fails
- examples : 44.10.1. Looping Until a Command Succeeds
- in Bourne shells
: 44.10.1. Looping Until a Command Succeeds
- updateb script
: 17.19. Finding Files (Much) Faster with a find Database
- uppercase
- pathname in
: 52.5.3.4. Installing a Single Program
- without CAPS LOCK : 31.11. Typing in Uppercase Without CAPS LOCK
- pathname in
: 52.5.3.4. Installing a Single Program
- uptime command : 39.7. Checking System Load: uptime
- average reported by : 39.12.1. The CPU
- Usenet
: 1.33. UNIX Networking and Communications
- $USER
- examples : 48.4.3. Automating Your Own Calendar
- user dictionaries
: (see dictionary files)
- USER environment variable
- user IDs (UIDs) : 38.3. Managing Processes: Overall Concepts
- file access : 1.23. File Access Permissions
- user time
- user's login shell, killing
: 38.10. Destroying Processes with kill
- user-defined signal : (see USR1 (user-defined) signal)
- user-state CPU time : 39.5. Why Is the System So Slow?
- username field in crontab entries : 40.12.1. Execution Scheduling
- users
- user-defined signal : (see USR1 (user-defined) signal)
- 17.16. Searching by Owner and Group
- (see also groups)
- classes of : 39.12.4. User Communities
- effect on system performance : 39.12.4. User Communities
- ownership : (see ownership, file)
- SUID bit
- (see also groups)
- 17.16. Searching by Owner and Group
- /usr directory
- /usr/bin directory
- programs in
: 1.10. Internal and External Commands
- in search paths : 44.3.4. Shell Search Paths
- programs in
: 1.10. Internal and External Commands
- /usr/include, header files in
: 52.8.2.7. Functions, Libraries, and Header Files
- /usr/lib/crontab file : 40.12.1. Execution Scheduling
- /usr/lib/crontab.local file : 40.12.1. Execution Scheduling
- /usr/local directory : 52.5.3.5. Installing Everything Using the Defaults
- /usr/tmp directory : 21.4. Why Both /tmp and /usr/tmp?
- /usr/lib/crontab file : 40.12.1. Execution Scheduling
- USR1 (user-defined) signal
: 38.8. What Are Signals?
- utilities, combining : 44.1. Everyone Should Learn Some Shell Programming
- UUCP (UNIX-to-UNIX copy)
- utilities, combining : 44.1. Everyone Should Learn Some Shell Programming
- uudecode command
: 19.5. Using tar to Create and Unpack Archives
- uuencode command : 19.5. Using tar to Create and Unpack Archives
- uuencoded files : 11.3. My Favorite Is !$
- UUNET : 52.7.2.3. UUCP
- uuencode command : 19.5. Using tar to Create and Unpack Archives
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