[SYMBOL]
[A]
[B]
[C]
[D]
[E]
[F]
[G]
[H]
[I]
[J]
[K]
[L]
[M]
[N]
[O]
[P]
[Q]
[R]
[S]
[T]
[U]
[V]
[W]
[X]
[Y]
[Z]
U.S. Secret Service (USSS)
UDP (User Datagram Protocol)
2nd
3rd
[See also network services]
DNS and
NFS protocol built on
TCP Wrappers support for
UDP socket
UFS (Unix File System)
2nd
ufsdump
[See dump program]
UIDs (user identifiers)
2nd
3rd
4th
5th
[See also SUID programs]
for superuser
real versus effective
2nd
and RPC requests
for server process
stored in inodes
su command and
switching temporarily
zero
[See root account superuser]
ulimit command
Ultrix
2nd
umask
2nd
UMNT request
UMNTALL request
unattended terminals
Underground (Dreyfus, Suelette)
underscore (_), in hostnames
Unicode
unintended disclosure and
uninterruptable power supply
[See UPS]
unison program
United States
federal computer crime laws
federal jurisdiction
Universal Coordinated Time (UTC)
Unix
[See also specific operating systems]
add-on functionality of
current trends
deployment environments using
free versions of
history of
2nd
3rd
4th
installing new system
kernel
[See kernel]
mobile versions of
open source
parts of
published resources for
secure versions of
security and
2nd
security policy
[See policy, security]
servers
starting up
system database files
system software, updating
thin-client systems
utilities
2nd
versions covered in this book
versions of
Unix domain socket
Unix File System
[See UFS]
The UNIX Programming Environment (Kernighan, Brian; Ritchie, Dennis; Pike, Rob)
Unix Support Group (USG)
UNIX System Administration Handbook (Nemeth, Evi; Snyder, Garth; Seebass, Scott; Hein, Trent R.)
UNIX System Security (Wood, Patrick H. and Kochan, Stephen G.)
Unix-to-Unix Copy System (UUCP)
unowned files
unsecure
unshare command
upgrades
backing out of
logging
sensitive
UPS (uninterruptable power supply)
2nd
uptime account
urandom device
Usenet
[See also NNTP]
groups, security-related
news user
reporting security holes on
USENIX/SAGE Association
User Datagram Protocol
[See UDP]
user IDs
[See UIDs]
usermod command
-e option
-f option
-s option
usernames
aliases for
doubling as passwords (Joes)
2nd
for superuser
switching temporarily
users
[See also employees; groups; superuser]2nd
accidentally deleting files
assigning passwords to
auditing equipment access of
auditing system activity of
authenticating
backup errors of
effects of obscurity on
identifiers for
[See UIDs]
importing to NIS server
2nd
as intruders
logging
monitoring
NIS passwords for
nobody
2nd
participation in security policy
power users
security awareness of
2nd
3rd
4th
security checklist for
2nd
security regarding
security threats caused by
2nd
sending messages to
summarizing filesystem usage by
switching temporarily
system
trusted
users command
2nd
USG (Unix Support Group)
/usr directory
[See also /var directory]
/usr/adm directory
/usr/bin directory
/usr/bin/uudecode
[See uudecode program]
/usr/etc/yp/makedbm program
/usr/lib directory
/usr/lib/preserve program
/usr/lib/sendmail
[See sendmail program]
/usr/lib/uucp/Devices file
/usr/lib/uucp/L-devices file
/usr/local/lib directory
/usr/sbin/rexecd
[See rexec service]
/usr/ucb directory
USSS (U.S. Secret Service)
UTC (Universal Coordinated Time)
utilities, Unix
security vulnerabilities with
standard
utimes() system call
utmp file
2nd
3rd
4th
utmpx file
UUCP (Unix-to-Unix Copy System)
uucp user
uudecode program
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