Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Question about variables
Top Forums Shell Programming and Scripting Question about variables Post 302370485 by hin-linux on Wednesday 11th of November 2009 03:30:15 PM
Old 11-11-2009
Question about variables
What does this mean?

Code:
#!/bin/bash
BACKUPFILE=backup-$(date +%m-%d-%Y)
archive=${1:-$BACKUPFILE}

Last edited by pludi; 11-11-2009 at 04:37 PM.. Reason: code tags, please...
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Question variables Korn

I'm using the following command to test for certain characters in a script echo "${1}" | grep '\$' if (( ${?} == 0 )) then testing this script on the command line I have ksh -x script1.sh "xxxx$xxxx" this works fine but when I want to use ksh -x script1.sh "xxxx $xxx" the... (1 Reply)
Discussion started by: frank
1 Replies

2. Programming

A question on C programming and Outputing variables

I was wondering if someone could show me what I'd need to do in C programming language to output the current values of all of your environment variables and do so in such a way that it will duplicate an "env" command on unix. Does anyone know how and can you share it with me? Thanks in advance. (2 Replies)
Discussion started by: HelpMeIAmLost
2 Replies

3. UNIX for Dummies Questions & Answers

Question about variables

I am looking for 8 variables in the following profile. I am looking to see if anyone could explain this for me better than the book I am using has been able to. There are 5 system, 2 aliases, and one editor. The profile is as follows: # @(#)local.profile 1.8 99/03/26 SMI stty istrip... (0 Replies)
Discussion started by: wswaner
0 Replies

4. UNIX for Dummies Questions & Answers

Shell script question on variables

I have the following script that is supposed to calculate the runtime of the script as a whole (edited for brevity): #!/bin/sh # set endtime and print elapsed time set starttime=`date +%s` echo "Value of starttime: " $starttime sleep 1 set endtime=`date +%s` echo "Value of endtime: "... (2 Replies)
Discussion started by: figaro
2 Replies

5. Shell Programming and Scripting

question about variables with sed

Hi, I am trying to do some mass replacements in lots of scripts, and using sed. However sed doesn't seem to like to be able to dereference variables within the substitute clause. For example: tab=newtable cat f1 | sed 's/oldtable/$tab/g' doesn't work. it would replace oldtable with the... (2 Replies)
Discussion started by: fwellers
2 Replies

6. Linux

Question about Variables in If?

Hi everybody, im trying to store a path "address" of a file in a variable, then IF the Address that the user entered INSIDE the variable is exist, do something, else echo invalid file address. here's my code, but it's not working i dunno why: $variable cat > variable #variable will contain... (4 Replies)
Discussion started by: iam_ako
4 Replies

7. UNIX for Dummies Questions & Answers

Variables question

Hi I am trying to find were to look for definitions of these variables; $0, $1, $2, $#, $$ , $*. I am not having much luck with my searching. Can anyone point me in the right direction? Thanks, Doug (3 Replies)
Discussion started by: Reddoug
3 Replies

8. Programming

Question on integer variables (c++)

Hello guys! It's orszhak and in my book I am currently studying incrementing values in c++ and it states thant I could do this to increment the value of nVariable nVariable = nVariable + 2; it states that I could also do this and assign the same value nVariable += 2; but can't I also do this and... (1 Reply)
Discussion started by: orszhak
1 Replies

9. Shell Programming and Scripting

awk question for printing variables

Hi All, I have the following awk code where I am passing 4 variables to the program and I need to print them in the awk script. The variables are $start_month $start_date - $end_month $end_date. printf("\tFor More Information\n") > out_tmp1 printf("\tIf you have any questions about this... (6 Replies)
Discussion started by: nua7
6 Replies

10. UNIX for Dummies Questions & Answers

Question On Sourcing Variables

I have 2 scripts first script would call second script. test1.sh #!/bin/bash logfile=`basename $0`.log echo "First File" >> $logfile TIME=`ls -lu array.ksh | awk '{print $6" "$7" "$8}'` . /home/infrmtca/bin/Test/test2.sh #/home/infrmtca/bin/Test/test2.sh test2.sh #!/bin/bash... (1 Reply)
Discussion started by: Ariean
1 Replies

LEARN ABOUT CENTOS

locale::codes::langext

Locale::Codes::LangExt(3)				User Contributed Perl Documentation				 Locale::Codes::LangExt(3)

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) 2011-2013 Sullivan Beck

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

perl v5.16.3							    2013-02-27						 Locale::Codes::LangExt(3)
All times are GMT -4. The time now is 03:14 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy