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Index: U

UDP (User Datagram Protocol): 15.1.1. TCP/IP Concepts

UFS filesystem: 6.1.1. Filesystem Types

UIDs (user IDs)

NFS, NIS and: 15.4.1. Configuring NFS

<ul> HTML tag: 16.1.4.6. More HTML features

UltraSPARC systems: F.1.4. UltraSPARC 64-bit Systems

F.5. SPARC-specific Issues After Installation

umount command: 6.1.2. Mounting Filesystems

UMSDOS filesystem: 6.1.1. Filesystem Types

uname command: 7.4. Building a New Kernel

uncompress program: 7.1.1. Using gzip and bzip2

uncompressing files (see compression)

undo command (Emacs): 11.4.7. Emacs

undoing edits (vi editor): 9.1.3. Deleting Text and Undoing Changes

Uniform Resource Locators (URLs): 16.1. The World Wide Web

Unix: 1.2. A Brief History of Linux

commands: 1.5.1. Basic Commands and Utilities

4. Basic Unix Commands and Concepts

commercial implementations of: 1.8.4. Other Implementations of Unix

Perl language: 13.4. Using Perl

unmask command: 4.14. Changing the Owner, Group, and Permissions

unmounting filesystems: 6.1.2. Mounting Filesystems

unnumbered lists in HTML: 16.1.4.6. More HTML features

unpacking (see compression)

unsafe option (LILO): G.2. Image Options

up command (lpc): 8.4.12. Controlling Printer Services with lpc

update program: 5.5. Shutting Down the System

upgrading: 7.2. Upgrading Software

compiler: 7.2.2. Upgrading the Compiler

kernel patches: 7.4.1.2. Applying patches

libraries: 7.2.1. Upgrading Libraries

UPS debugger: 14.2.1. Debuggers

URLs (Uniform Resource Locators): 16.1. The World Wide Web

Usenet (see news)

User Datagram Protocol (UDP): 15.1.1. TCP/IP Concepts

user ID: 5.7.1. The passwd File

5.7.7. Modifying User Accounts

useradd program: 3.2.1. Creating a User Account

5.7.5. Creating Accounts

userdel command: 5.7.6. Deleting and Disabling Accounts

UserDir directive: 16.1.3.2. srm.conf

usermod command: 5.7.7. Modifying User Accounts

usernames: 5.7.1. The passwd File

users: 5.7.4. The Group File

(see also groups)

accounts: 3.2.1. Creating a User Account

4.1. Logging In

5.7. Managing User Accounts

creating/deleting: 5.7.5. Creating Accounts

backing up directories: 8.1.1. Simple Backups

for cron tasks: 8.2. Scheduling Jobs Using cron

log of those logged in: 8.3. Managing System Logs

permissions (see permissions)

root: 5.1. Running the System

5.7.1. The passwd File

/usr directory

/usr/bin directory: 4.16. Important Directories

16.2.1.4. smail EDITME file

/usr/bin/apsfilter directory: 8.4.9. Magic Filters: APSfilter and Alternatives

/usr/include directory: 4.16. Important Directories

/usr/lib directory: 4.16. Important Directories

8.1.1. Simple Backups

13.1.7. More Fun with Libraries

/usr/lib/autofs directory: 6.1.3. Automounting Devices

/usr/local directory: 4.16. Important Directories

/usr/man directories: 9.3.2.2. Formatting and installing the manual page

/usr/sbin directory: 4.16. Important Directories

/usr/src directory: 4.16. Important Directories

7.2.3. Upgrading Other Software

/usr/src/linux directory: 7.4. Building a New Kernel

8.1.1. Simple Backups

/usr/X11R6 directory: 10.3. Installing XFree86

/usr/X11R6/lib/X11 file: 4.16. Important Directories

8.1.1. Simple Backups

utmp file: 8.3. Managing System Logs

UUCP (Unix to Unix Copy): 1.5.7. Networking

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