If statements in Linux terminal

Homework and Emergencies Homework & Coursework Questions If statements in Linux terminal

Prev Next

10-09-2013

Registered User

6,384, 2,214

Join Date: May 2005

Last Activity: 28 October 2019, 4:59 PM EDT

Location: In the leftmost byte of /dev/kmem

Posts: 6,384

Thanks Given: 143

Thanked 2,214 Times in 1,548 Posts

Quote:

Originally Posted by sea

man bash says:

Code:

       ((expression))
              The expression is evaluated according to the rules described below
              under ARITHMETIC EVALUATION.  If the value of the expression is
              non-zero, the return status is 0;  otherwise  the return status is 1.
              This is exactly equivalent to let "expression".

       [[ expression ]]
              Return a status of 0 or 1 depending on the evaluation of the
              conditional expression expression.

This is exactly what i said. I have marked bold the relevant part pertinent to "(( ... ))" and for "[[ ... ]]" have a look at what man test has to say about tests behavior.

I hope this helps.

bakunin

bakunin

View Public Profile for bakunin

Find all posts by bakunin

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Getting the process ID of the terminal in Unix/Linux

Hi, How can we get the process id of the terminal we are using? When we logged in to unix, we have an associated terminal. we can use "tty" command to get the terminal we are using like: /dev/pts/0 I want to know the process id of this terminal. Please reply as I searched a lot but I...

2. UNIX for Dummies Questions & Answers

Linux terminal server?

Hello everyone, I have an interesting project I'd like to implement on a Linux server here at work. Essentially, I'd like to replace a handful of Windows servers with a single Linux server. The only task these Windows servers perform, is provide remote desktops via RDP protocol that people...

3. UNIX for Dummies Questions & Answers

Is there picture based game under linux terminal?

Is there picture based game under linux terminal? Just like Supermario under DOS.

4. Homework & Coursework Questions

help with linux terminal window

Hello! I need to create a file and provide access to two users of the file under the same command in linuxs terminal window. The question is how can I do it?

5. Linux

how to perform a system check on linux via terminal

hi im new to this and i just want to learn about linux and i just wanted to know how would i be able to perform a system check to see if a directory exists. can any one help me?

6. Windows & DOS: Issues & Discussions

looking for linux like tab terminal for windows

Hello all is there any free tool like linux tabbed terminal but for windows im used to work with putty and its great but i wander if there something like putty but with tabs thanks

7. Ubuntu

Error on my Linux terminal

Hi, I keep on getting the following error on my linux terminal. It did not harm my system so far, but I was wondering if this can be eliminated. { Gecko:4617): GLib-GObject-CRITICAL **: file gobject.c: line 1337 (g_object_unref): assertion `G_IS_OBJECT (object)' failed (Gecko:4617):...

8. Shell Programming and Scripting

How to have color coded Terminal display,(like linux)

Hi all, I would like to know how to have a color display in the terminal... In the sense that, In many linux terminals,we have color coded for each file type, green for executable ,blue for dirs and so on... I wanted to know how i can have the same arrangement in solaris(b-79a) I am not...

9. Solaris

Terminal settings from linux to solaris

When I log in from my linux workstation (CentOS4) to a solaris 8 server using SSH or telnet, the terminal settings don't seem to work well. When I tail or vi a file, I get a blank screen or no response, and I am no longer able to interact with the session. I have to type the escape sequence to...

LEARN ABOUT DEBIAN

debconf-mergetemplate

DEBCONF-MERGETEMPLATE(1)					      Debconf						  DEBCONF-MERGETEMPLATE(1)

NAME

       debconf-mergetemplate - merge together multiple debconf template files

SYNOPSIS

	debconf-mergetemplate [options] [templates.ll ...] templates

DESCRIPTION

       Note: This utility is deprecated. You should switch to using po-debconf's po2debconf program.

       This program is useful if you have multiple debconf templates files which you want to merge together into one big file. All the specified
       files will be read in, merged, and output to standard output.

       This can be especially useful if you are dealing with translated template files. In this case, you might have your main template file, plus
       several other files provided by the translators. These files will have translated fields in them, and maybe the translators left in the
       english versions of the fields they translated, for their reference.

       So, you want to merge together all the translated templates files with your main templates file. Any fields that are unique to the
       translated files need to be added in to the correct templates, but any fields they have in common should be superseded by the fields in the
       main file (which might be more up-to-date).

       This program handles that case properly, just list each of the translated templates files, and then your main templates file last.

OPTIONS

       --outdated
	   Merge in even outdated translations. The default is to drop them with a warning message.

       --drop-old-templates
	   If a translation has an entire template that is not in the master file (and thus is probably an old template), drop that entire
	   template.

SEE ALSO

       debconf-getlang(1)

AUTHOR

       Joey Hess <joeyh@debian.org>

								    2012-09-10						  DEBCONF-MERGETEMPLATE(1)

Homework & Coursework Questions