HP-UX Reference (11i v1 00/12) - 5 Miscellaneous Topics, 7 Device (Special) Files, 9 General Information, Index (vol 9)

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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
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c
glossary(9) glossary(9)
the control key (which may be labeled CTRL, CONTROL, or CNTL depending on your ter-
minal), and pressing a character key (as you would use SHIFT). These two-key sequences
are often written as, for example, Control-D, Ctrl-D,orˆD, where ˆ stands for the control
key.
controlling process
The session leader that establishes the connection to the controlling terminal. Should
the terminal subsequently cease to be a controlling terminal for this session, the session
leader ceases to be the controlling process.
controlling terminal
A terminal that is associated with a session. Each session can have at most one controlling
terminal associated with it and a controlling terminal is associated with exactly one session.
Certain input sequences from the controlling terminal cause signals to be sent to all
processes in the foreground process group associated with the controlling terminal.
Coordinated Universal Time (UTC)
See Epoch.
CS/80, CS-80 A family of mass storage devices that communicate with the controlling computer by means
of a series of commands and data transfer protocol referred to as the CS/80 (Command Set
1980) command set. This command set was implemented in order to provide better
forward/backward compatibility between models and generations of mass storage devices as
technological advances develop. Some mass storage devices support only a subset of the
full CS/80 command set, and are usually referred to as SS/80 (Subset 1980) devices.
crash The unexpected shutdown of a program or system. If the operating system crashes, this is
a ‘‘system crash’’, and requires the system to be re-booted.
current directory
See working directory.
current working directory
See working directory.
daemon A process which runs in the background, and which is usually immune to termination
instructions from a terminal. Its purpose is to perform various scheduling, clean-up, and
maintenance jobs. lpsched(1M) is an example of a daemon. It exists to perform these
functions for line printer jobs queued by lp(1). An example of a permanent daemon (that
is, one that should never die) is cron(1M).
data encryption
A method for encoding information in order to protect sensitive or proprietary data. For
example, HP-UX automatically encrypts all users’ passwords. The encryption method used
by HP-UX converts ASCII text into a base-64 representation using the alphabet
., /, 0-9,
A-Z, a-z. See passwd(4) for the numerical equivalents associated with this alphabet.
default search path
The sequence of directory prefixes that sh(1), time(1), and other HP-UX commands apply in
searching for a file known by an relative path name (that is, a path name not beginning
with a slash (/)). It is defined by the environment variable PATH (see environ(5)).
login(1) sets
PATH equal to :/usr/bin, which means that your working directory is the
first directory searched, followed by /usr/bin. The search path can be redefined by
modifying the value of PATH. This is usually done in /etc/profile , and/or in the
.profile file found in the home directory.
delta A term used in the Source Code Control System (SCCS) to describe a unit of one or
more textual changes to an SCCS file. Each time an SCCS file is edited, changes made to
the file are stored separately as a delta. The get(1) command is then used to specify which
deltas are to be applied to or excluded from the SCCS file, thus yielding a particular version
of the file. Contrast this with the vi or ed editor, which incorporates changes into the file
immediately, eliminating any possibility of obtaining a previous version of that file. A simi-
lar capabilityis provided by RCS files (see rcsintro(5)).
demon Improper spelling of the UNIX word daemon.
device A computer peripheral or an object that appears to an application as such.
HP-UX Release 11i: December 2000 − 4 − Section 9−−5
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