11-15-2005
8 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
1 . Thanks everyone who read the post first.
2 . I have a log file which size is 143M , I can not use vi open it .I can not use xedit open it too.
How to view it ?
If I want to view 200-300 ,how can I implement it
3 . Thanks (3 Replies)
Discussion started by: chenhao_no1
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2. Shell Programming and Scripting
Can someone help me to write a script / command to read in a file, character by character, replace any unknown ASCII characters with space. then write out the file to a new filename/
Thanks! (1 Reply)
Discussion started by: raghav525
1 Replies
3. Shell Programming and Scripting
Hi All,
I have a big log file i want to delete all characters (between 350th to 450th characters) starting at 350th character position to 450th character position.
please advice or sample code. (6 Replies)
Discussion started by: rajeshorpu
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4. UNIX for Advanced & Expert Users
I want to know how to, given a string like W87151WR71C, if the 4th and 5th character (in this case 15) are greater than 45, then to add 1 to the 3rd character (in this case 7) and assign the revised string the variable name MODSTRING.
Thanks in advance. This is ultimately to grab info from... (6 Replies)
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5. UNIX for Dummies Questions & Answers
I have a 5000 line config.log file with several "maybe" errors. Any reccomendations on finding solvable problems? (2 Replies)
Discussion started by: NeedLotsofHelp
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6. Shell Programming and Scripting
hello all
i request you to give the solution for the following problem..
I want read the text file.and print the contents character by character..like if the text file contains google means..i want to print
g
go
goo
goog
googl
google
like this Using unix Shell scripting...
without using... (1 Reply)
Discussion started by: samupnl
1 Replies
7. Shell Programming and Scripting
Hi All,
Was wondering how I can do the following....
I have a String as follows
"ACCTRL000005022RRWDKKEEDKDD...."
This string can be in a file called tail.out or in a Variable called $VAR2
Now I have another variable called $VAR1="000004785" (9 bytes long), I need the content of... (5 Replies)
Discussion started by: mohullah
5 Replies
8. Shell Programming and Scripting
Hi,
Anyone can help using SED searches a character string for a specified delimiter character, and returns a leading or trailing space/blank.
Text file :
"1"|"ExternalClassDEA519CF5"|"Art1"
"2"|"ExternalClass563EA516C"|"Art3"
"3"|"ExternalClass305ED16B8"|"Art9"
...
...
... (2 Replies)
Discussion started by: fspalero
2 Replies
LEARN ABOUT X11R4
pbmreduce
pbmreduce(1) General Commands Manual pbmreduce(1)
NAME
pbmreduce - read a portable bitmap and reduce it N times
SYNOPSIS
pbmreduce [-floyd|-fs|-threshold ] [-value val] N [pbmfile]
DESCRIPTION
Reads a portable bitmap as input. Reduces it by a factor of N, and produces a portable bitmap as output.
pbmreduce duplicates a lot of the functionality of pgmtopbm; you could do something like pnmscale | pgmtopbm, but pbmreduce is a lot
faster.
pbmreduce can be used to "re-halftone" an image. Let's say you have a scanner that only produces black&white, not grayscale, and it does a
terrible job of halftoning (most b&w scanners fit this description). One way to fix the halftoning is to scan at the highest possible res-
olution, say 300 dpi, and then reduce by a factor of three or so using pbmreduce. You can even correct the brightness of an image, by
using the -value flag.
OPTIONS
By default, the halftoning after the reduction is done via boustrophedonic Floyd-Steinberg error diffusion; however, the -threshold flag
can be used to specify simple thresholding. This gives better results when reducing line drawings.
The -value flag alters the thresholding value for all quantizations. It should be a real number between 0 and 1. Above 0.5 means darker
images; below 0.5 means lighter.
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pnmenlarge(1), pnmscale(1), pgmtopbm(1), pbm(5)
AUTHOR
Copyright (C) 1988 by Jef Poskanzer.
02 August 1989 pbmreduce(1)