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Full Discussion: del the line before the "abc"line and after it
Top Forums Shell Programming and Scripting del the line before the "abc"line and after it Post 302406602 by yanglei_fage on Tuesday 23rd of March 2010 11:18:31 AM
Old 03-23-2010
del the line before the "abc"line and after it
Code:
$file1
haha
hello i'm lei
i'm abc
you are right
yes it is

I want to get
Code:
file2
haha
i'm abc
yes it is

del line before and after the line contains abc I want to know the two steps 1,del the line before line "abc' ,2 del the line after the "abc


question 2
Code:
$file3
haha
hello i'm lei
i'm abc
you are right
yes it is

I want to get



$file4
Code:
haha
hello i'm lei
<!-- i'm abc -->
you are right
yes it is

then I want to recover it from file4 to file3

Code:
$file2
haha
hello i'm lei
i'm abc
you are right
yes it is

 

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LEARN ABOUT MINIX

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)
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