how to check first character in var's value.

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Var Check Script (Help improve if possible)

I am working on a script to check the var on all of my systems. Can someone help me fix it to work better or give me suggestions. #!/bin/ksh IN=/path/to/list_of_workstations.txt while read hostnames do if ping $hostnames 1 | grep alive > /dev/null then percent=`ssh -q...

2. Shell Programming and Scripting

Help with a shell script to check /var file system

deleting

3. UNIX for Dummies Questions & Answers

Check to see if string var is empty

i have a veriable set var1 set var2 = abcd how can i check if var 1 is empty and if var 2 is not empty ???

4. Shell Programming and Scripting

How to check for special character in a value

Hi, I have a variable and to it always alphanumeric value will be assigned. If the value has any special characters in it then in the if statement it should exit like below if (value has any speacial character) then exit else .... fi can any one suggest how to acheive this?

5. Shell Programming and Scripting

check number of character

hi, I would like to calculate number of character for a number, for exemple : 1200 --> there are 4 characters , 120001 -> 5 characters

6. Shell Programming and Scripting

check whether it is a non-numeric character

Below is the abstract of the script which is working fine. if ] then error_process "Invalid month format." return 1 fi I am doing validation for month and it errors if the value is > 12 or < 0. In addition, I want to add another condition to error if it...

7. AIX

check for a particular character inside a file and substitute with a given character?

i am a newbie to shell script,so i want a kshell script in which i need to check for a particular character inside a file through conditional looping(like if ,case,while)and if that character exists ,then substitute a given character to that character. consider a file test.txt,inside the file...

8. Shell Programming and Scripting

how to check string of character

how can i check whether variable contains only character from a-z or A-Z....if my variable contains any alpha numeric, numeric or any character with some special one i.e. *%&@! etcetera etcetera....then it should show me please enter only characters...... Let my variable var1="abc77}|" then...

9. Shell Programming and Scripting

Bourne: search for a non-numeric character in $VAR

if $1 = "123x456", how can I test for the non-numeric character 'x' in that string. I've tried expr with "" but it did not find the x. Any ideas? Can this perhaps be done with sed? Thanks.

10. UNIX for Dummies Questions & Answers

check for the first character to be blank

I'm having a problem when the first line or first character of a file is blank. I need to get rid of both of them when they occur but don't want to delete the line. Does anyone have any suggestions?

LEARN ABOUT LINUX

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)

UNIX for Dummies Questions & Answers