How to Check given string is number in shell script?

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Concatenate a string and number and compare that with another string in awk script

I have below code inside my awk script if ( $0 ~ /SVC IN:/ ) { svc_in=substr( $0,23 , 3); if (msg_start == 1 && msg_end == 0) { msg_arr=$0; } } else if ( $0 ~ /^SVC OUT:/ ) { svc_out=substr( $0, 9, 3); if (msg_start == 1 && msg_end == 0) ...

2. Shell Programming and Scripting

Linux Shell: how to check a string whether meets some conditions

Hi, guys. In Linux Shell script, how can I check a string whether meets some conditions. e.g.: If a string str must start with a underscore or a alphabet, and it must contains at least one lowercase, one uppercase, one numeric and one punctuation, and its length must be more than 8 characters...

3. Shell Programming and Scripting

korn shell: check the content of a string of a variable

hello, i have a variable which should have following content : var="value1" or var="value2" or var="value2:*" # example: value2:22 how can i check : - if the content is ok (value1 / value2* ) - the two options of "value2" when content is example "value2:22" , i want to split...

4. UNIX for Dummies Questions & Answers

converting string to number in shell script

Hi, I am having a problem in converting a string to number so I can preform arithmetic operations. timeTot=0 timeTmp=$(cat idsOutput | grep 'Run time' | cut -c 36-39) timeTot=$ #This is line 28 echo "total RunTime=" $timeTot this is the error msg: ./ids2.sh: line 28: 0+1.35: syntax...

5. Shell Programming and Scripting

Linux Shell Script to check for string inside a file?

This is what I have so far grep -lir "some text" * I need to check all files on the system for this text, if the text is found I need to change the file permissions so only ROOT has read and write access. How can this be done?

6. Shell Programming and Scripting

Check parameter is number or string

Hey I'm new in linux, I'm looking for a code to check whether the parameter is a number or a string. I have already tried this code: eerste=$(echo $1 | grep "^*$">aux) if But it doesn't work.:confused: Thanks

7. Shell Programming and Scripting

Shell Script to identify the line number containing a particular "string"

Hi, I have a log file, where i am required to identify the line number, where a particular string/line appears in the log file. And then copy 200 lines above that line number to a new file. Can someone provide pointers on how to write this script or what command to be used ? Any...

8. Shell Programming and Scripting

How to check whether a string is number or not

Hi , I am facing a problem .. which looks simple... but took 2 days of mine.. even now it is not solved completely.. I have one variable..., want to know whether that variable contains number... canbe +ve or -ve ... Values +35 --- number -43 --- number 45A -- non number...

9. UNIX for Dummies Questions & Answers

check whether variable number or string

I am passing an argument to a file and i wanna check whether the argument is a number or string ? how can i do this?

10. Shell Programming and Scripting

shell to number and to string

Hello Does the unix korn shell provide a function to convert between number and string data-types regards Hrishy

LEARN ABOUT DEBIAN

lr_environment

LR_ENVIRONMENT.IN(1)					  LogReport's Lire Documentation				      LR_ENVIRONMENT.IN(1)

NAME

       lr_environment - Export Lire configuration in shell script form

SYNOPSIS

       eval `lr_environment`

DESCRIPTION

       The lr_environment command is used to import the Lire configuration in Lire shell scripts.

       All of Lire configuration variables will be written in a format that can be evaled by the shell.

       Shell scripts don't usually have to use that command, since it is done by the defaults file sourced by each command.

       The old names used by when the configuration was done in shell script are also exported by this script for backward compatibility.

AUTHOR

	 Francis J. Lacoste <flacoste@logreport.org>

VERSION

       $Id: lr_environment.in,v 1.12 2006/07/23 13:16:33 vanbaal Exp $

COPYRIGHT

       Copyright (C) 2003 Stichting LogReport Foundation LogReport@LogReport.org

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program (see COPYING); if not, check with
       http://www.gnu.org/copyleft/gpl.html.

Lire 2.1.1							    2006-07-23						      LR_ENVIRONMENT.IN(1)

Shell Programming and Scripting