The cat command is not necessary since sed can read a file on its own.
The red part is matching another 16 characters, and when you \1 those 16 matched chars are discarded and replaced by AAAAAAAA.
The red part has to be the same length of the substitution if you do not want to truncate the original line any farther.
---------- Post updated at 05:25 PM ---------- Previous update was at 05:02 PM ----------
You can do it with many other programs, however I prefer Perl.
How to I get the nth character from a string in shell script. For instance, I have a string London. I want to get, say the first character (L) from the string. How do I do this in unix shell?
Thankx (4 Replies)
Hi all,
If you look at the example below,I want to replace the 21st character (,) with a period (.). I have 1000 records in a file can someone help me how to do that. Thankyou all in advance.
"2008-07-15... (3 Replies)
I have an awk script to find the maximum value of the 2nd column of a 2 column datafile, but I need to find the top 5 maximum values of the 2nd column.
Here is the script that works for the maximum value.
awk 'BEGIN { subjectmax=$1 ; max=0} $2 >= max {subjectmax=$1 ; max=$2} END {print... (3 Replies)
Is there an awk script that can easily perform the following operation?
I have a data file that is in the format of
1944-12,5.6
1945-01,9.8
1945-02,6.7
1945-03,9.3
1945-04,5.9
1945-05,0.7
1945-06,0.0
1945-07,0.0
1945-08,0.0
1945-09,0.0
1945-10,0.2
1945-11,10.5
1945-12,22.3... (3 Replies)
Hi,
I have a requirement to search for a pattern in each line in a file and remove the in between words till the 3rd occurrence of double quote (").
Ex: CREATE TABLE "SCHEMANAME"."AMS_LTV_STATUS"
(Note: "SCHEMANAME" may changes for different schemas. Its not a fixed value)
I need to... (2 Replies)
Hi guyz i want to know nth position of character in string. For ex.
var="UK,TK,HK,IND,AUS"
now if we see 1st occurance of , is at 3 position, 2nd at 6,..4th at 13 position.
1st position we can find through INDEX, but what about 2nd,3rd and 4th or may be upto nth position. ?
In oracle we had... (2 Replies)
I have a requirement as below.
In one of my column, I have data which may or may not be separted with coma always. Now I need to validate the length of these text within the coma (if available) and if the length is more than 30 characters, I need to insert a coma either at 30 characters if its... (3 Replies)
Using Awk, how can I achieve the following?
I have set of record numbers, for which, I have to replace the nth field with some values, say spaces.
Eg:
Set of Records : 4,9,10,55,89,etc
I have to change the 8th field of all the above set of records to spaces (10 spaces).
Its a delimited... (1 Reply)
Discussion started by: deepakwins
1 Replies
10. Post Here to Contact Site Administrators and Moderators
I have Index Line and I tried to get the 9th character from the file and to check the character is "|" or not.
Shell Scripting.
Sample Index file.
"91799489|K8E|188.004.A.917994892.1099R.c.01.pdf|2013|10/15/2014|002|B|C|C"... (3 Replies)
Discussion started by: pavand
3 Replies
LEARN ABOUT REDHAT
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)