LInux Shell Scripting Important Points

DISPLAY DIALOG BOX

dialog –tiltle TITLE --backtitle BACKTITLE

--yesno	Text	Height		Width
--msgbox	Text	Height		Width
--infobox	Text	Height		Width
--inputbox	Text	Height		Width
--textbox	{file-location}	{height}		{width}
--menu	--menu	{title}	{height}	{menu-height}	First Arug1	First Arug2

Shell Scripting Disadvantage.

1) Running Very slow in Shell script	Reason: To start the every new command Consider as a New Process.
	Resolved : Using Pipe Line and filter command we can avoid these.

Shell Scripting command error Meaning

[: -l: unary operator expected

Unknown Operator.

-->

Comparison Between Shell Script and Perl Script.

PERL	SHELL
Can be Used Both UNIX and Windows. Unless OS Specific Commands are used	It is not applicable to the Shell scripting in Unix Based.
Used for Web Based Application.	Not applicable for Shell Script.