Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Bash - command substution not working
Homework and Emergencies Emergency UNIX and Linux Support Bash - command substution not working Post 302926344 by sreyan32 on Sunday 23rd of November 2014 01:43:49 PM
Old 11-23-2014
Quote:
Originally Posted by sea
You do not need to put date, ls, or any other COMMAND to put in quotes when executed in a terminal.

Just like this is enough:
Code:
date
ls
w

To actualy work with them, it is suggest to echo them when encapsuled in a XY (what is this called again?).
As in:
Code:
echo $(( $(w| wc -l) - 2 ))
echo $(( $(date +%s) / 86400 ))

Because if you just call:
Code:
$(( $(date +%s) / 86400 ))

It will fail, because its result is not a COMMAND.

Furthermore (but not relevant to the post), F14 is way end of life, 21 is coming out soon.

Hope this helps
Thanks that solved my problem. Don't know what you mean by F14 though.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

#!/bin/bash has stopped working

Hi I'm writing a script and I've put #!/bin/bash as the first line so that I can just type my scripts name 'whodate' at PS1 instead of ./whodate. This has suddenly stopped working for me. It used to be the case that I could start a script with #!/bin/bash and it would work, but for this script... (2 Replies)
Discussion started by: zorrokan
2 Replies

2. Shell Programming and Scripting

if loop not working in BASH shell

i have this code for a simple if loop: #!/bin/bash array="1 2 3 4 5" array2="5 6 7 8 9" if } -gt ${array} ]; then echo "${array2} is greater than ${array}!!" fi the error is ./script8: line 9: [: too many arguments ./script8: line 9: [: too many arguments ./script8: line 9: [:... (10 Replies)
Discussion started by: npatwardhan
10 Replies

3. Shell Programming and Scripting

Simple BASH script not working?

So I need a script that does the following: If a certain user is logged in Run `command` Else Echo “incorrect user” This is my first stab...which doesn't work: #!/bin/bash X="user=`ls -l /dev/console | cut -d " " -f 4`" Y="foobar" echo $X echo $Y (4 Replies)
Discussion started by: doubleminus
4 Replies

4. Shell Programming and Scripting

export not working in Bash shell

Hi Friends, I am presently migrating shell scripts writter in KSH to SH.I am stuck at this place and i am not able to find a work around:- Let the script name is x.sh Below are some of the codes in it... export abc=hello export abc=hi export abc=how When i am trying to compile the script ... (6 Replies)
Discussion started by: amit.behera
6 Replies

5. HP-UX

Why Bash is not working in HP-UX ?

Why Bash is not working in HP-UX ? What is similiar exe which is in HP_UX as Bash? (9 Replies)
Discussion started by: girija
9 Replies

6. Shell Programming and Scripting

Working with bash and date

Hello all, I'm trying to substract 1 minute from the current date and take the hour and minute (for filename purpose). 1) If I want hour an minute from current time I can use: timetmp=$(date +"%H:%M") 2) To substract 1 minute from current time I can use: timetmp=$(date --date "$dte -1... (8 Replies)
Discussion started by: Lord Spectre
8 Replies

7. Shell Programming and Scripting

sed not working in a bash script

Hi friends, I have two files - input and commands I want to read the input and replace a value in it with the contents in commands. My script is like this. Instead of printing the value in the commands file, it is simply printing $cmd in the output file. Any pointers are highly... (1 Reply)
Discussion started by: jacobs.smith
1 Replies

8. Shell Programming and Scripting

Working with grep and Bash

Hi, I am currently working on a Bash shell script that - Downloads a webpage, in this case youtube.com - Extracts Number of views, Extracts Title of video, Extracts User who made it, and lastly Duration. Then I have to Out put this into columns. To me this sounds like crazyness. I'm very new... (6 Replies)
Discussion started by: Njzangel
6 Replies

9. Shell Programming and Scripting

How to run several bash commands put in bash command line?

How to run several bash commands put in bash command line without needing and requiring a script file. Because I'm actually a windows guy and new here so for illustration is sort of : $ bash "echo ${PATH} & echo have a nice day!" will do output, for example:... (4 Replies)
Discussion started by: abdulbadii
4 Replies

10. Programming

Best way to get a bash script working in C

Ahoy friends. Currently i got a bash script running to manage my minecraft servers. All of them are stored in /home/minecraft_servers directory. Using my script im able to start a server (e.g. ./minecraft start ftb_continuum) because server name and server name are the same.(e.g.... (2 Replies)
Discussion started by: Knogle
2 Replies

LEARN ABOUT OSX

locale::codes::langext

Locale::Codes::LangExt(3pm)				 Perl Programmers Reference Guide			       Locale::Codes::LangExt(3pm)

NAME

       Locale::Codes::LangExt - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangExt;

	  $lext = code2langext('acm');		       # $lext gets 'Mesopotamian Arabic'
	  $code = langext2code('Mesopotamian Arabic'); # $code gets 'acm'

	  @codes   = all_langext_codes();
	  @names   = all_langext_names();

DESCRIPTION

       The "Locale::Codes::LangExt" module provides access to standard codes used for identifying language extensions, such as those as defined in
       the IANA language registry.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default IANA language
       registry codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language extensions. A code set may be specified using either a name, or
       a constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langext('acm','alpha');
	  $lext = code2langext('acm',LOCALE_LANGEXT_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from the IANA language registry, such as 'acm' for Mesopotamian Arabic.

	   This is the default code set.

ROUTINES

       code2langext ( CODE [,CODESET] )
       langext2code ( NAME [,CODESET] )
       langext_code2code ( CODE ,CODESET ,CODESET2 )
       all_langext_codes ( [CODESET] )
       all_langext_names ( [CODESET] )
       Locale::Codes::LangExt::rename_langext  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangExt::add_langext  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangExt::delete_langext  ( CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangExt::delete_langext_alias  ( NAME )
       Locale::Codes::LangExt::rename_langext_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::delete_langext_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.iana.org/assignments/language-subtag-registry
	   The IANA language subtag registry.

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2012 Sullivan Beck

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

perl v5.16.2							    2012-10-11					       Locale::Codes::LangExt(3pm)
All times are GMT -4. The time now is 07:17 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy