Some questions about grep/awk Post: 302444955

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Simple grep questions

Hi all, My boss wants me to find out how often e-m users are accessing their account:confused:. The mail server keeps log of all logins. I want to use grep the 'usernames', but it should come out the moment it first encounters the username in the log. Can I do that? I want to avoid 10+ greps...

2. UNIX for Dummies Questions & Answers

Unpratical SED and GREP questions

Hello every one, I have read a little about SED and GREP but I do not know how to do this: Using SED or GREP: "reverse all three letter words" "replace the last two digits in any string of digits by zeros (0)" "remove lines that start and end with the same word" and I have more like...

3. UNIX for Dummies Questions & Answers

grep questions

I have the data file: A 1 2 3 BBB 4 5 6 A 7 8 9 I want to grep "A" then-skip a line-then-add two sublines: I my command: grep +3 "A" datafile

4. UNIX for Dummies Questions & Answers

Questions on GREP command

Hi, Is it possible to display a specific number of lines starting from a line having a particular text using grep command? e.g. I have a text file with the contents below: AAA BBB CCC DDD EEE FFF I want to display 3 lines starting with the line having "BBB" to get the result below:...

5. UNIX for Dummies Questions & Answers

Using Grep Questions

Hello All, 1.) I am searching for ".exe" in a text file 2.) I need to search for a hexadecimal entree of at least four digits

6. Shell Programming and Scripting

Grep questions

Hello All, I have few of questions related to Grep given below: 1. Like Perl, is it possible in Grep to negate characters in square brackets. For example in Perl, if '^' is used inside '' then it acts as a negation characters. Can same be achieved through Grep's regular expression. 2. How...

7. Shell Programming and Scripting

grep and sed exact match questions

This post was previously mistaken for homework, but is actually a small piece of what I working on at work. Please answer if you can. QUESTION1 How do you grep only an exact string. I am using Solaris10 and do not have any GNU products installed. Contents of car.txt CAR1_KEY0 CAR1_KEY1...

8. UNIX for Dummies Questions & Answers

Couple of questions wth grep/sort

I have different things that I was trying to do but am kind of struggling with this since I'm a Linux noob. The backround is that I have two files with student names in the same directory, and each file lists the student name, their major and their grade level. What is the most efficient way to...

9. Shell Programming and Scripting

Sed/grep questions

Hi. I have a txt file. I need to make a copy of the lines which are beginning with a mobile phone number, or a fix phone number. I have to copy thoose lines in numbers.txt, after that i have to delete then from the originally file. In numbers.txt i need to write a prefix before each number. if the...

10. Homework & Coursework Questions

awk questions using sort and grep

1. The problem statement, all variables and given/known data: So i'll probably get told off for this but I have a few problems and rather than clog up the whole forum I'll post them here. Please bare in mind I am a complete novice when it comes to all this and so if you help please treat me like a...

LEARN ABOUT ULTRIX

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)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Simple grep questions

Discussion started by: nitin

2. UNIX for Dummies Questions & Answers

Unpratical SED and GREP questions

Discussion started by: Lem2003

3. UNIX for Dummies Questions & Answers

grep questions

Discussion started by: bobo

4. UNIX for Dummies Questions & Answers

Questions on GREP command

Discussion started by: stevefox