There are a number of variables provided by the Korn shell that allow you to customize your working environment. Some are automatically set by the Korn shell, some have a default value if not set, while others have no value unless
specifically
set.
|
CDPATH
|
search
path
for
cd
when not given a full pathname (no default)
|
|
COLUMNS
|
window width for in-line edit mode and
select
command lists (default
80
)
|
|
EDITOR
|
pathname of the editor for in-line editing (default
/bin/ ed
)
|
|
ENV
|
pathname of the environment file (no default)
|
|
FCEDIT
|
default editor for the
fc
command
|
|
FPATH
|
search path for auto-loaded functions pathname of the history file
|
|
HISTFILE
|
pathname of the history file (default
$HOME/ .sh_history
)
|
|
HISTSIZE
|
number of commands to save in history file (default
128
)
|
|
HOME
|
home directory
|
|
IFS
|
internal field separator (default space, tab, newline)
|
|
LINES
|
specifies column length for
select
lists
|
|
MAIL
|
name
of mail file
|
|
MAILCHECK
|
specifies how often to check for mail (default
600
seconds)
|
|
MAILPATH
|
search path for mail files (no default)
|
|
OLDPWD
|
previous working directory
|
|
OPTARG
|
value of the last
getopts
option argument
|
|
OPTIND
|
index of the last
getopts
option argument
|
|
PATH
|
search path for commands (default
/bin:/usr/bin:
)
|
|
PPID
|
process id of the parent shell
|
|
PS1
|
primary prompt string (default $, #)
|
|
PS2
|
secondary prompt string (default >)
|
|
PS3
|
select
command prompt (default #?)
|
|
PS4
|
debug prompt string (default +)
|
|
RANDOM
|
contains a random number
|
|
REPLY
|
contains input to
read
command when no variables given
|
|
SECONDS
|
contains number of seconds since Korn shell invocation
|
|
SHELL
|
pathname of shell
|
|
TERM
|
specifies your terminal type (no default)
|
|
TMOUT
|
Korn shell timeout variable (default
)
|
|
VISUAL
|
pathname of the editor for in-line editing
|
