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Differing Features

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• The following table defines differing features between the Bourne, Korn and C-Shell.

sh	ksh	csh	Meaning/Action
$	$	%	Prompt
	>|	>!	Force redirecion
		>>!	Force Append
		{ }	Expand elements in list
	$( )		Substitute output of enclosed command
$HOME	$HOME	$home	Home directory
	~	~	Home directory symbol
var=value	var=value	set var=value	Variable assignment
export var	export var=val	export var=value	Set environment variable
	${nn}		More than nine args can be referenced
"$@"	"$@"		All args as seperate words
$#	$#	$#argv	Number of arguments
$?	$?	$status	Exit status
$!	$!	%	Background exit status
$-	$-		Current options
. file	. file	source file	Read commands in file
	alias x=y	alias x y	Name x stands for y
case	case	switch case	Choose alternatives
	cd~-	popd/pushd	Switch directories
done	done	end	End a loop ststement
esac	esac	endsw	End case or switch
for/do	for/do	foreach	Loop through variables
	print -r	glob	Ignore echo escapes
hash	alias -t	hashstat	Display tracked aliases (hashed commands)
hash cmds	alias -t cmds	rehash	Remember command locations
hash -r	PATH=$PATH	unhash	Forget command locations

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