Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Sed question
Top Forums UNIX for Advanced & Expert Users Sed question Post 302140700 by drl on Monday 15th of October 2007 02:25:26 PM
Old 10-15-2007
Hi.

Note than "-i" really refers to the result, not the operational characteristics; a temporary file is still created. Think of it as a convenience, not as an option to save space:
Quote:
`-i[SUFFIX]'
`--in-place[=SUFFIX]'
This option specifies that files are to be edited in-place. GNU
`sed' does this by creating a temporary file and sending output to
this file rather than to the standard output.(1).

This option implies `-s'.

When the end of the file is reached, the temporary file is renamed
to the output file's original name.

-- excerpt from info sed
(I think I would have written that last part as "... to the input file's original name".)

cheers, drl
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Sed Question

Hi, Is there any way to traverse the file once and look for the following conditions in one sweep instead of going over the file 3 times with different search criteria...... sed -n '/^ORA-07445/ p' /tmp/t$$ > ${OERRFILE} sed -n '/^ORA-00600/ p' /tmp/t$$ >> ${OERRFILE} ... (1 Reply)
Discussion started by: YS2002
1 Replies

2. Shell Programming and Scripting

sed question (again)

hello there, I have a sed question. I have a file (temp.srv), in it it has v1_host1 v2_host2 And I have another file (temp2.srv), in it is has v1_host3_date v1_host1 v2_host2 v2_host4_date v3_host5_date I had used a script to remove the name from temp2.srv base on the name inside... (3 Replies)
Discussion started by: ahtat99
3 Replies

3. Shell Programming and Scripting

sed question

Hi, When deleting lines using sed, as i understand the lines are redirected to the standard output. What i'm unclear about is how to actually modify the file? If I write the command sed '1,2d' test it will display lines one and 2 onto the screen however the file is not modified? I think my... (5 Replies)
Discussion started by: c19h28O2
5 Replies

4. Shell Programming and Scripting

sed question

Hi, :) can any body explain the following statement sed 's/\(\)- ]//g' cheers RRK (3 Replies)
Discussion started by: ravi raj kumar
3 Replies

5. Shell Programming and Scripting

sed question

I have a file that conatins following info Policy1=U|guestRoom=test1idCode=5(1):!:Amenity2=U|RoomId=testrma=4(1):!:| GuestRoomAmenity1=U|guestRoomId=testguest1id^rmaCode=5(1):!:| I need it to look like this Policy1=U|guestRoom=test1idCode Amenity2=U|RoomId=testrmaCode... (2 Replies)
Discussion started by: arushunter
2 Replies

6. UNIX for Dummies Questions & Answers

sed question

How would I use sed to print everything on the line after the regular expresion? I have a configuration file setting several variables. cfg.dat DDB = cpptest SUDBNAME = sucpptestdb host = cpptest Example I want to search for the regular expresion 'SUDBNAME =' and print everything on... (3 Replies)
Discussion started by: orahi001
3 Replies

7. Shell Programming and Scripting

Sed Question 1. (Don't quite know how to use sed! Thanks)

Write a sed script to extract the year, rank, and stock for the most recent 10 years available in the file top10_mktval.csv, and output in the following format: ------------------------------ YEAR |RANK| STOCK ------------------------------ 2007 | 1 | Exxon... (1 Reply)
Discussion started by: beibeiatNY
1 Replies

8. Shell Programming and Scripting

sed question

hi i have a file with this line: variable=/export/home/oracle I want to change the file so that the path is replaced with the value of another variable var2=/tmp/anything. how to do this in sed? thx (4 Replies)
Discussion started by: melanie_pfefer
4 Replies

9. Shell Programming and Scripting

Sed question

I need to replace the numbers with a new string. How can I give a wildcard for the different # of numbers sed '/abcdef/s/abcdef=*/abcdef=999999/'<foo>foo1 From: To: abcdef=1234 abcdef=999999 abcdef=12345 abcdef=999999 abcdef=123456... (10 Replies)
Discussion started by: beppler
10 Replies

10. UNIX for Dummies Questions & Answers

SED question

I am trying to write a script that will take an input text file in the format person: place: phonenumber; person: place: phonenumber; person: place: phonenumber; ... and output it using sed too: Name ######## Location ######### Phone Number... (1 Reply)
Discussion started by: jmack56
1 Replies

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)
All times are GMT -4. The time now is 02:32 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy