U

Index

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UDF (Universal Disk Format) file system
udf modules
ufs modules
UIDs (User IDs) 2nd
umask command
umount command 2nd
     floppy disks, unmounting
     remote file systems, removing
umsdos modules
uname command
undeleting files
     ext2fs undeletion process
     mc command
     mke2fs-S command
unexpanded variables
unicast addressing
Universal Coordinated Time (UTC)
UNIX
     backup levels
     DNS (Domain Name System) security
     Linux comparisons
unknown image files, identifying
unless conditional statement
unmounting Samba shares
unprivileged domains
Unreal Tournament
unrecoverable file system errors
unset() function
unshar command
unshielded twisted pair (UTP) cables
until statements 2nd
up2date command 2nd
updates
     installers
     network security
upgrade installation option (Fedora Core)
upgrading
     Apache
     BIND (Berkeley Internet Name Domain)
     networks
     release cycles
uplink ports
uptime command
USB devices
     drives
     Linux support
     printers
     scanners
use function
Usenet newsgroups
     article formats
     hierarchy of
     naming
     NNTP
     Perl resources
     posts to
     threads
user accounts
     /etc/passwd files
     /etc/skel files
     chgrp command
     chmod command
     chown command
     command-line tools 2nd
     creating 2nd
     deleting
     disk quotas
     Fetchmail
     file ownership
     file permissions
     FTP users
     GIDs (group IDs)
    granting system administrator privileges to
         restricted shells
         root privileges, granting on occasion
         UIDs (user IDs), temporarily changing
     locking users out of
     login process
     MySQL
     PAM (Pluggable Authentication Module)
     passwords
         /etc/passwd file
         batch password changes
         selecting
         shadow passwords
         system password policies
     regular users
    root accounts [See root users.]
     standard users
     types of
     UIDs (User IDs) 2nd
     user activity, monitoring
    user information
         changing
         verifying
     user stereotypes
     usernames 2nd
     viewing
     websites
User directive (httpd.conf file)
USER environment variable
User IDs (UIDs)
user information directives (ftpaccess file)
     displaying administrator email address
     displaying files
     displaying prelogin banners
     last modification date notifications
User Mount Tool
user variables
useradd command 2nd
     group management
     user management
userdel command
UserDir directive (httpd.conf file)
userinfo command
usermod command
     group management
     user management
usermount command 2nd
usernames
     assigning
     creating
     format of
userpasswd command
users [See user accounts.]
usertty file
/usr directory 2nd
     /usr/bin directory
     /usr/include directory
     /usr/lib directory
     /usr/lib/modules directory
     /usr/lib/X11 directory
     /usr/sbin/ftpshut files
    /usr/sbin/smbd [See smbd daemon.]
     /usr/share/doc directory
     /usr/src/linux-2.6 directory
         /configs subdirectory
         arch directory
         Documentation directory
         kernel source code
         kernel testing programs
         scripts directory
     /usr/src/linux-2.6/configs directory
     /usr/X11/man directory
     Linux file system hosting
UTC (Universal Coordinated Time)
UTF-8 language encoding
UTP (unshielded twisted pair) cables
uucp (UNIX-to-UNIX copy program)