[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]
validation program
values, null, checking for
variables [See also local variables, environment variables]
$? variable
arithmetic
attributes
Korn shell
awk 2nd 3rd
Bash 2nd
BASH_ENV variable
built-in
awk 2nd
C shell
C shell 2nd
debugging issues 2nd
directory stack
environment
Bourne shell
Korn shell
exit status
Bourne shell
C shell
using in script
extracting values from
Bash
Bourne shell
C shell
Korn shell
field
history
Bash
C shell
initialization
integers
Bash 2nd
Korn shell 2nd
Korn shell 2nd
local
Bourne shell
C shell
Korn shell
local variables
nawk user-defined functions
null or unset
pathname modifiers
printing
Bourne shell
echo command 2nd
Korn shell
TC shell
set
Bourne shell
Korn shell
special
Bourne shell
C shell
Korn shell
substitution
types
unsetting
Bourne shell
Korn shell
user-defined
variable expansion modifiers
Bourne shell
Korn shell
verbose option
vi
Bash
commands
Korn shell
TC shell
Korn shell
regular expression metacharacters
selecting as editor
TC shell
vi editor text editors
FCEDIT variable
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