Ksh scripting language is also known as a Korn unix shell scripting language. Korn shell is a powerful high level language programming language used to writing applications and this is easy and quick than the other high-level languages. The code size of the Ksh scripting language is larger than the other scripting languages. The first line of the Korn scripting is
#!/bin/ksh. Ksh scripting language provide many features of Object oriented languages e.g conditions, iterations, variables, exceptions.
$date Fri May 1 22:59:28 EDT 2008 $uptime 10:59PM up 259 days, 9:44, 5 users, load average: 3.81, 14.27, 13.71 $hostname gonzo
Develop by : David Korn Initial release : 1983 Type : Unix shell Written in : C Operating system : Cross-platform Platform : Unix
CDPATH : Search path for the cd built-in command. Works the same way as PATH for those directories not beginning with / in cd commands.
COLUMNS : Set to the number of columns on the terminal or window. Cur-rently set to the cols value as reported by stty(1) if that value is non-zero.
EDITOR : If the VISUAL parameter is not set, this parameter controls the command line editing mode for interactive shells.
ENV : If this parameter is found to be set after any profile files are executed, the expanded value is used as a shell start-up file.
ERRNO : indicates the reason the last system call failed.
EXECSHELL : If set, this parameter is assumed to contain the shell that is to be used to execute commands that execuve(2) fails to execute and which do not start with a `#! shell' sequence
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