I have a log file with over 500000 lines and I want to use sed command to filter through the file and delete the first 5000 lines.
I have tried
sed -e '1,5000d' fileA.
where d is delete but this does not work. Any ideas ?
Regards
dodo14 :o (1 Reply)
Hi,
I'm trying to use sed to process some files on Macs running OSX. Anyone know anything about Macs and sed?
Here's the problem
sed 's/^/ /g' test_file > endfile
(there are spaces betwen the second and third /, but the forum software compresses them)
This should put spaces at... (3 Replies)
i need a sample unix awk/sed program to replace param3 in a file.
i have sample file a.dat with the following format/length (week 8, sku 20, store 20 and qty 8). all store id's which end with _2 needs to be replaced with div id 2. all store id's which end with _1 needs to be replaced with div id... (4 Replies)
hello,
i have a csh file that calls a program and stores the output in a variable. the output is: \*\%VFT\$1\\3
as you can see there is a backslash before every non alphanumeric character. i save this output and then use SED to replace a word in a file with the output that i got.
... (3 Replies)
hi i want to append the number in each file,but when i ran this command:-
sed -i "1i 50" filename
its giving error sed: illegal option -- i in HP unix
but its working in linux.
any advice !!!!!!!!! (6 Replies)
Please help on the usage of sed in unix.
The questions are below :
1. how to display a particular word in a file using sed
2. how to replace a single letter in a word using sed
ex : in a file, all the 'ram' should be replaced by 'Ram'
3. i want to display a particular word from file... (1 Reply)
Hi,
I am a new student learning about Unix. Can anyone help with the following sed command. What would this command do?
sed -n -e '/^s/p'
Any help you can provide would be a big help.
Thanks in advance! (2 Replies)
I have a text file containing multiple lines like
password="&test.";
password="xyz";
password='write some';
password="&testwrite.";
today='o1jan2017'd;
-----------------
------------------
I don't want to replace the string value which are starting with & for Password variable... (3 Replies)
Discussion started by: harshabag
3 Replies
LEARN ABOUT DEBIAN
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)