Bash string variable outputting incorrectly Post: 302655819

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

PATH variable set incorrectly?

I've noted that in order to use commands like ifconfig, I have to prefix the commands with the directory. /etc/profile shows that the paths should be part of the PATH environment variable; any idea where the bug is? :confused: # /etc/profile # System wide environment and startup...

2. Shell Programming and Scripting

Bash string variable manipulation

In a bash script I've set a variable that is the directory name of where an executable lives. the_dir=`dirname $which myscript` which equates to something like "/path/to/dir/bin" I need to cut that down to remove the "bin" so I now have "/path/to/dir/". This sounds easy but as a...

3. UNIX for Dummies Questions & Answers

outputting selected characters from within a variable

Hi all, if for example I had a variable containing the string 'hello', is the any way I can output, for example, the e and the 2nd l based on their position in the string not their character (in this case 2 and 4)? any general pointers in the right direction will be much appreciated, at...

4. Shell Programming and Scripting

Bash:How to split one string variable in two variables?

Hello, I have a paramter $param consisting just of two literals and want to split it into two parameters, so I can combine it to a new parameter <char1><string><char2>, but the following code didn't work: tmp_PARAM_1=cut -c1 $PARAM tmp_PARAM_2=cut -c2 $PARAM...

5. Shell Programming and Scripting

Bash assign string to variable

Hi ,I am trying to assign string to variable ,but it doesn't work Also could you show me different ways to use grep,(I am trying to get the first,second and first column form file,and I am counting the chars) let name=`grep "$id" product | cut -c6-20`

6. Shell Programming and Scripting

BASH script outputting strange file formats

Hi I am very new to using BASH, but I have a problem with a piece of script that I have been working on. Basically the script goes through a mailbox file looking at particular aspects of the file, for example how many spamwords there are email address etc. It does this pretty well except for an...

7. UNIX for Dummies Questions & Answers

bash variable string declaration

Hello, Why is this not working in a script? files="test.fsa" echo $files for file in $files do if then echo "$file does not exist." fi run a command done I get an error saying

8. Shell Programming and Scripting

bash: using a string variable in grep

Hi, I've been stuck for several days on this. Using grep on a command line, I can use quotes, eg... grep 'pattern of several words' filename I want to do this in my bash script. In my script I have captured the several command line arguments (eg arg1 arg2) into a variable: variable=$@ I...

9. Shell Programming and Scripting

Passing string as variable(s) in bash

I'm trying to write a basic bash script that takes input you give (what directory, if any, what name, if any ....) and passes the information to find. I'm trying to just create a string with all variables and then pass it to find. So far I have this extremely simple: #!/bin/bash -f ...

10. Shell Programming and Scripting

Convert a string to variable in Bash shell

Hi All; I have 2 variable let's say $A and $B. These are actually some remotely executed command outputs. I captured these values in my local variables. Here is my problem. When I try to do some arithmetic operation with these variables, I receive an error message. Neither expr nor typeset -i...

LEARN ABOUT DEBIAN

ppmtopgm

ppmtopgm(1)						      General Commands Manual						       ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and	pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

								   10 April 2000						       ppmtopgm(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

PATH variable set incorrectly?

Discussion started by: jon80

2. Shell Programming and Scripting

Bash string variable manipulation

Discussion started by: Witty

3. UNIX for Dummies Questions & Answers

outputting selected characters from within a variable

Discussion started by: skinnygav

4. Shell Programming and Scripting

Bash:How to split one string variable in two variables?

Discussion started by: ABE2202