arithmetic in ksh Post: 302105004

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I am a beginner and I have been searching the web all morning for this answer but can't find it anywhere. I know that prtint 1*2 will return 1*2 what if i actually want the problem to be calculated so i want print 1*2 to return 2 How is this done?

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Help with arithmetic operation

I am using egrep to extract numbers from a file and storing them as variables in a script. But I am not able to do any arithmetic operations on the variables using "expr" because it stores them as char and not integers. Here is my code and the error I get. Any help will be appreciated. #!/bin/sh...

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strange ksh arithmetic

Hello, I would like to understand this... I'm using ksh and doing (( z = y - 1 )) if y=34, then the result for z is 33, but if y=034 the result is z=27. Why?? Thanks

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ksh-script "arithmetic syntax error" comparing strings

Hi all, I�ve already searched the forum but can�t find what i am doing wrong. I am trying to compare two variables using ksh under red hat. The error I get is: -ksh: .: MDA=`md5sum /tmp/ftp_dir_after_transfer | cut -d' ' -f1 ` MDB=`md5sum /tmp/ftp_dir_before_transfer | cut -d' ' -f1 `...

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Guys, The below expression is valid in which shells (sh,ksh,bash,csh)? VAR1=2 VAR2=$(($VAR1 -2)) Thanks

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I have a fundamental question on C pointer arithmetry.. Suppose i have a c string pointer already pointing to a valid location, Can I just do a charptr = charptr +1; to get to the next location, irregardless if my program is 32 or 64 bits? or should i do it this way: charptr =...

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Hello, I am having a problem when i execute following script on RHEL 6.4. Same script works fine on another machine where I have same version of RHEL and KSH. Below is the rpm and RHEL version. ossvm12(0)> rpm -qa | grep ksh ksh-20100621-19.el6.x86_64 ossvm12(0)> cat...

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Need help with date arithmetic please

Hello fellow forum members, I wrote below piece of code to calculate the date after a given date - date=$DATE_FINAL declare -a max_month=(0 31 28 31 30 31 30 31 31 30 31 30 31) eval $(echo $date|sed 's!$....$$..$$..$!year=\1;month=\2;day=\3!') (( year4=year%4 )) (( year100=year%100...

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Arithmetic with bash

I need to divide the number of white spaces by total number of characters in a file using bash. I am able to get the number of white spaces correctly using: tr -cd �� < afile | wc -c I am also able to get the total number of characters using: wc -c afile How do I divide the first...

LEARN ABOUT DEBIAN

distro-info

DISTRO-INFO(1)						      General Commands Manual						    DISTRO-INFO(1)

NAME

       distro-info - provides information about the distributions' releases

SYNOPSIS

       distro-info [OPTIONS]

DESCRIPTION

       distro-info is a symlink to the distro-info command for your distribution.  On Debian it links to debian-distro-info and on Ubuntu it links
       to ubuntu-distro-info.  All options described in this manual page are available in all distro-info commands. All other options,	which  are
       not described here, are distribution specific.

OPTIONS

       --date=DATE
	      date for calculating the version (default: today)

       -h, --help
	      display help message and exit

       -a, --all
	      list all known versions

       -d, --devel
	      latest development version

       -s, --stable
	      latest stable version

       --supported
	      list of all supported stable versions

       --unsupported
	      list of all unsupported stable versions

       -c, --codename
	      print the codename (default)

       -r, --release
	      print the release version

       -f, --fullname
	      print the full name

SEE ALSO

       debian-distro-info(1), ubuntu-distro-info(1)

AUTHOR

       The script and this manual page was written by Benjamin Drung <bdrung@debian.org>.

distro-info							   January 2011 						    DISTRO-INFO(1)

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Arithmetic In UNIX

Discussion started by: tygun

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Help with arithmetic operation

Discussion started by: emjayshaikh

3. Shell Programming and Scripting

strange ksh arithmetic

Discussion started by: fbg

4. Shell Programming and Scripting

ksh-script "arithmetic syntax error" comparing strings

Discussion started by: old_mike