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Index
U
UDP servicesfirewalls and, Example 1: Firewall for shared Internet connection (plus servers)
ufs file system, Supported file systems
UIDFTP server access, Denying/allowing user access by UID and GID
UID environment variable, Set your own environment variables
umask commandfile permissions, Understanding file permissions
umask parameter, FTP server, Enabling umask
umount command, Using the umount command to unmount a file system
umsdos file system, Supported file systems
undoingvi text editor, Starting with vi
UNIXdocumentation tools, Creating Documents in Groff or LaTeX
print commandsCUPS, Switching printing service
printersremote, adding, Adding a remote UNIX printer
relationship to Linux, Linux's Roots in UNIX
System V, Why Choose Red Hat Linux?
UnixFromLine option, sendmail, sendmail options
unmount command, Summary
Unreal Tournament (id Software), Unreal Tournament
UnsafeGroupWrites option, sendmail, sendmail options
until...do loopshell scripts, The "while . . . do" and "until . . . do" loops
updatesRPM packagesyum, Using yum for listing and updating packages
updatingalert motification tool, Using the Red Hat Network alert notification tool, Registering with Red Hat Network
software, Getting Linux Software "up2date"
checking for updates, Registering with Red Hat Network, Getting Updates
software packages, Features in Red Hat Linux
up2date facility, Getting Linux Software "up2date"
upgradeinstallationkickstart file, Creating the kickstart file
upgrade keyword, Creating the kickstart file
upgradesinstallation information, Quick Installation
upgradingLinux version requirements, Beginning the installation
performance considerations, Beginning the installation
uploadingFTP serverlimiting, Limiting uploading and downloading, Data limits, Connection time limits
uploading filesanonymous users, Uploading (writing) files from anonymous users
local users, Uploading (writing) files from local users
uploading to FTP server, Allowing uploading of incoming files, Opening directories for uploading, Preventing files or directories from being retrieved
up2date faciltiy, Getting Linux Software "up2date"
up2date softwarechecking for updates, Registering with Red Hat Network
running, Getting Updates
URLs, Uniform Resource Locators, Table 9-1: Protocols in Web URLs, Uniform Resource Locators
URLs (uniform resource locators), Browsing the Web
UseErrorsTo option, sendmail, sendmail options
user accounts, Enabling Authentication, Creating User Accounts
adding users, Adding users with useradd, Table 11-1: useradd Command Options, Adding users with useradd, Adding users with Red Hat User Manager, Setting system profiles
installation, Quick Installation
installation and, Beginning the installation
prompts, The Shell Interface
reasons for, Why Do I Need a User Login?
user filesfind command and, Deleting user accounts with userdel
user interface. See also GUI, Common Linux Features
user interfaces, What Is an Operating System?
User Manager, Administrative commands
adding users, Adding users with Red Hat User Manager, Setting system profiles
deleting accounts, Deleting user accounts with Red Hat User Manager
modifying accounts, Modifying user accounts with Red Hat User Manager, Deleting user accounts with Red Hat User Manager
user defaults, Setting User Defaults, Table 11-2: useradd Options for Changing User Defaults, Setting User Defaults
shell options, Configuring system-wide shell options
system profiles, Setting system profiles
tcshrc file, Supplying an initial .tcshrc file
bashrc file, Supplying an initial .bashrc file
login scripts, Supplying initial login scripts
user namecommand line automatic completion feature, Command line completion
user security, Samba, Security options
user services, network services reference, User services
finger server, Finger server
remote execution servers, Remote execution servers
remote user identification, Remote user identification
RWall server, Write-to-All server
talk servers, Talk server
user-defined chains (firewalls), Example 1: Firewall for shared Internet connection (plus servers)
user-defined variablesshell scripts, Understanding shell variables
user-level security, netatalk, User-level security
useradd command, Adding users with useradd, Table 11-1: useradd Command Options, Adding users with useradd
user defaults, Setting User Defaults, Table 11-2: useradd Options for Changing User Defaults, Setting User Defaults
shell options, Configuring system-wide shell options
system profiles, Setting system profiles
tcshrc file, Supplying an initial .tcshrc file
bashrc file, Supplying an initial .bashrc file
login scripts, Supplying initial login scripts
userdel command, Deleting user accounts with userdel, Table 11-4: Using find to Locate and Change User Files
usermod command, Modifying user accounts with usermod, Table 11-3: usermod Options for Changing Existing Accounts, Modifying user accounts with usermod
username, Logging in to Red Hat Linux
usersaddingadding, Adding Samba users
adding/removing, Adding and Removing User Access, Adding users and granting access, Revoking access, Checking and Fixing Databases
anonymous, The anonymous FTP user
AppleTalk, Setting up users
bashrc file, Supplying an initial .bashrc file
concurrent, limiting, Limiting the number of concurrent users
configuration, User accounts, Using mysql user/group accounts
directories, Identifying user directories
FTP server, Limiting host access to anonymous and guest logins
guest users, Guest users
login scripts, Supplying initial login scripts
MySQL, Adding administrative users
real users, Real users
real users, limiting access, Denying access to real users
Red Hat User Manager, Adding users with Red Hat User Manager, Setting system profiles
shell options, Configuring system-wide shell options
system profiles, Setting system profiles
tcshrc file, Supplying an initial .tcshrc file
technical support mailbox, Creating a technical support mailbox
uploading files, Uploading (writing) files from local users, Uploading (writing) files from anonymous users
user classes, Creating user classes
User Manager, Modifying user accounts with Red Hat User Manager, Deleting user accounts with Red Hat User Manager
useradd command, Adding users with useradd, Table 11-1: useradd Command Options, Adding users with useradd
administrativeanonymousApache server, Choosing the server's user and group
defaults, Setting User Defaults, Table 11-2: useradd Options for Changing User Defaults, Setting User Defaults
deleting accounts, Deleting User Accounts
userdel, Deleting user accounts with userdel, Table 11-4: Using find to Locate and Change User Files
e-mail to all, Sending Mail to All Users
FTP, Creating FTP users, Real users, Guest users, Creating the FTP directory structure, Creating README files, Changing the initial greeting, Controlling FTP access, Creating user classes, Opening directories for uploading, Preventing files or directories from being retrieved, Enabling chmod, Enabling umask, Limiting the number of concurrent users, File limits, Denying access to host computers, Denying access to real users, Starting and shutting down the WU-FTPD service, Shutting down WU-FTPD, Monitoring the WU-FTP server, Logging file transfers
FTP server, FTP user types
FTP serverslocalmapping options, exports file, User mapping options in /etc/exports
modifying accounts, Modifying user accounts with usermod, Table 11-3: usermod Options for Changing Existing Accounts, Modifying user accounts with usermod
MySQLMySQL databasesnews users, INN, Starting with INN
password reset, Resetting a user's password
portable desktops, Creating Portable Desktops
Samba, Configuring a simple Samba server
setupsupporttrusted users, sendmail, Trusted users
vsFTPdusr directory, Working with the Red Hat Linux File System
utilitiesbackupspax, Using the pax Archiving Tool
document format conversion, Converting documents
oggenc, Converting audio files with Sox
uucp user login, Understanding administrative logins
