6
W
orking
with
Shells
Whenev
er
y
ou
en
ter
a
command
y
ou
are
making
use
of
a
command
in
terpreter
whic
h
in
terprets
that
command
for
HP-UX.
The
command
in
terpreter
is
called
a
shell .
When
y
ou
log
in,
y
ou
are
said
to
b e
\in"
a
shell .
HP-UX
supp orts
sev
eral
dieren
t
shells
whic
h
b eha
v
e
in
slightly
dieren
t
w
a
ys
and
give
y
ou
v
arying
amoun
ts
of
in
teractive
supp ort
at
y
our
display
.
These
are
called
the
Bourne,
Korn,
Key
,
and
C
Shells.
Y
our
system
administrator
determines
whic
h
shell
y
ou
get
when
y
ou
rst
log
in,
and
y
ou
ha
v
e
the
option
of
c
hanging
shells
later.
Basics
of
Shells:
Characteristics,
Choosing
and
Using
HP-UX
gives
y
ou
y
our
c
hoice
of
sev
eral
dieren
t
shell-typ es
whic
h
y
ou
can
run:
the
Bourne,
Korn,
Key
,
and
C
Shells.
Eac
h
of
these
shells
has
dieren
t
c
haracteristics,
and
y
ou
can
increase
the
sp eed
and
eciency
with
whic
h
y
ou
in
teract
with
HP-UX
inside
windo
ws
if
y
ou
learn
to
use
some
of
the
built-in
features
of
the
shell
of
y
our
c
hoice.
F
or
details
on
shell
features
and
b eha
vior,
please
see
the
Be
ginner's
Guide
to
HP-UX
and
the
Shel
ls:
User's
Guide
.
Using
the
Command
Line
6-3
Summary of Contents for 425s
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