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Full Discussion: Difference in Shell Scripts
Top Forums UNIX for Dummies Questions & Answers Difference in Shell Scripts Post 70296 by Just Ice on Wednesday 27th of April 2005 10:16:03 AM
Old 04-27-2005
Quote:
Originally Posted by dangral
I can tell you that in ksh there are some minor differences between Sun and HP-UX.

On Sun you will have no problem doing:
Code:
if [ -z $VAR ]

but on HP-UX you will have to put double quotes around $VAR.

Also when doing a string comparison, on Sun you can do
Code:
if [ "${ErrorOccurred}" == "Y" ]

but on HP-UX, you can't have the double equals.


There are probably more, but those are a couple I can think of off the top of my head.
if you stick to having double quotes around variables and using only 1 "=" sign for shell tests, you will not notice any difference on the shell scripts aside from the OS-specific external commands ... if you want a portable script that does the same thing on different platforms, have the script check for the OS and then put in the OS-specific command lines as required ...
Code:
OS=`uname`
case $OS in
SunOS)  admintool ;;
AIX)    smit ;;
*)      echo "etcetera, etcetera, etcetera..." ;;
esac

 

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LEARN ABOUT CENTOS

cpanplus::shell::default::plugins::remote

CPANPLUS::Shell::Default::Plugins::Remote(3)		User Contributed Perl Documentation	      CPANPLUS::Shell::Default::Plugins::Remote(3)

NAME

       CPANPLUS::Shell::Default::Plugins::Remote - connect to a remote CPANPLUS

SYNOPSIS

	   CPAN Terminal> /connect localhost 1337 --user=foo --pass=bar
	   ...
	   CPAN Terminal@localhost> /disconnect

DESCRIPTION

       This is a "CPANPLUS::Shell::Default" plugin that allows you to connect to a machine running an instance of "CPANPLUS::Daemon", allowing
       remote usage of the "CPANPLUS Shell".

       A sample session, updating all modules on a remote machine, might look like this:

	   CPAN Terminal> /connect --user=my_user --pass=secret localhost 1337

	   Connection accepted

	   Successfully connected to 'localhost' on port '11337'

	   Note that no output will appear until a command has completed
	   -- this may take a while

	   CPAN Terminal@localhost> o; i *

	   [....]

	   CPAN Terminal@localhost> /disconnect

	   CPAN Terminal>

BUG REPORTS

       Please report bugs or other issues to <bug-cpanplus@rt.cpan.org<gt>.

AUTHOR

       This module by Jos Boumans <kane@cpan.org>.

COPYRIGHT

       The CPAN++ interface (of which this module is a part of) is copyright (c) 2001 - 2007, Jos Boumans <kane@cpan.org>. All rights reserved.

       This library is free software; you may redistribute and/or modify it under the same terms as Perl itself.

SEE ALSO

       CPANPLUS::Shell::Default, CPANPLUS::Shell, cpanp

perl v5.16.3							    2013-05-20			      CPANPLUS::Shell::Default::Plugins::Remote(3)
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