How to unset all variables in shell? Post: 302358062

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to unset 'finger' info?

Hi, Command "chfn" can be used to change finger information.. can anybody tell me how to unset i mean reset the same finger information. Thanks in advance, Chanakya

2. UNIX for Advanced & Expert Users

how to unset the readonly variable

Hi All, May be this is a very simple question... $ b=8 $ readonly b $ echo $b 8 $ b=90 -bash: b: readonly variable $ unset b -bash: unset: b: cannot unset: readonly variable I m not able to change the readonly mode of variable b Please help me out.. Thanks Nidhi

3. Shell Programming and Scripting

How to check exit status of unset variables

Hi All, Is there any way to check exit status of unset variables? In the following code PathX is not set and the script terminates without checking exit status. #!/bin/bash Path="/tmp/log" cd ${PathX:?} if ;then echo "Exit Status : non zero" else echo "Exit Status :...

4. UNIX for Advanced & Expert Users

unset .bashrc

Could someone please tell me how to unset your .bashrc? I have tried all of these. I can't find anything useful from google. unset -f .bashrc unset .bashrc

5. Shell Programming and Scripting

[ask] about unset variables

I'm wondering, is the number of variables will affect execution time of my bash script or maybe affect the cpu workload, cpu memory, etc ? If I create so many variables, should I unset each one of that variables after I used them or after I think they are no longer needed? and if my script...

6. Shell Programming and Scripting

Unset variables in shell when it running two different loops

I have a script to start/stop/restart the tomcat application. When we run the script first time i.e stop/start it set all env variables(DISTRIB_ID,NAME,TOMCAT_CFG,....etc),but when we restart the tomcat it is running in the same shell.....I need to set the variables when i restart the tomcat(in the...

7. Shell Programming and Scripting

Unset variable with characters in value

I have a script with a $PASSWORD variable. I unset it right after using it, just to minimize the chance it could be left around for a snooper. That worked just fine... until I used a password with a value of "P@ssw0rd" Now, unset (even with -f, even with the variable enquoted) tells me: unset:...

8. Shell Programming and Scripting

Listing all local variables for unset

I have tried to thoroughly search other threads before posting this question... I have a shell script (bsh) that I'd like to "re-execute" if the user chooses to. Before the program is executed again the local variables (those set within the script) need to be unset. Is there a command that...

9. UNIX for Dummies Questions & Answers

Unset environement variable

Hi, I have the following line in the script unset _SET_ENV_AA unset _SETENV but where I can check the value for this environement variable

10. UNIX for Dummies Questions & Answers

Where unset command locates?

Hi, Can someone tell what is the path for "unset", I tried "which" command but getting below error # which unset /usr/bin/which: no unset in (/usr/lib/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin/:/root/bin)

LEARN ABOUT CENTOS

test::vars

Test::Vars(3)						User Contributed Perl Documentation					     Test::Vars(3)

NAME

       Test::Vars - Detects unused variables

VERSION

       This document describes Test::Vars version 0.005.

SYNOPSIS

	   use Test::Vars;

	   all_vars_ok(); # check libs in MANIFEST

DESCRIPTION

       Test::Vars finds unused variables in order to keep the source code tidy.

INTERFACE

   Exported
       all_vars_ok(%args)

       Tests libraries in your distribution with %args.

       libraries are collected from the MANIFEST file.

       If you want to ignore variables, for example $foo, you can tell it to the test routines:

       "ignore_vars => { '$foo' => 1 }"
       "ignore_vars => [qw($foo)]"
       "ignore_if => sub{ $_ eq '$foo' }"

       Note that $self will be ignored by default unless you pass explicitly "{ '$self' => 0 }" to "ignore_vars".

       vars_ok($lib, %args)

       Tests $lib with %args.

       See "all_vars_ok".

MECHANISM

       "Test::Vars" is similar to a part of "Test::Perl::Critic",but the mechanism is different.

       While "Perl::Critic", the backend of "Test::Perl::Critic", scans the source code as texts, this modules scans the compiled opcode (or AST:
       abstract syntax tree) using the "B" module. See also "B" and its submodules.

CONFIGURATION

       "TEST_VERBOSE = 1 | 2 " shows the way this module works.

CAVEATS

       https://rt.cpan.org/Ticket/Display.html?id=60018

       https://rt.cpan.org/Ticket/Display.html?id=82411

DEPENDENCIES

       Perl 5.10.0 or later.

BUGS

       All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to
       cpan-RT.

SEE ALSO

       Perl::Critic

       warnings::unused

       B

       Test::Builder::Module

AUTHOR

       Goro Fuji (gfx) <gfuji(at)cpan.org>

LICENSE AND COPYRIGHT

       Copyright (c) 2010, Goro Fuji (gfx). All rights reserved.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic for details.

perl v5.16.3							    2014-06-10							     Test::Vars(3)