Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Need help with sed command
Top Forums Shell Programming and Scripting Need help with sed command Post 302914044 by Don Cragun on Thursday 21st of August 2014 01:01:24 PM
Old 08-21-2014
Quote:
Originally Posted by linuxUser_
Dear Don Cragun,

You are expert.
I would like to see your posts with little explanation like in this command lines you are doing something like editing the file and saving in some temp files then copying to the original file (correct me if my understanding is wrong).

Thanks & Regards,
linuxUser_
The command:
Code:
sed 's/xValue .*;/xValue 19.1434;/' file > file.$$ && mv file.$$ file

directs the output from sed to a temporary file whose name ends with a period followed by the process ID of the shell that is running this command. If the sed command succeeds (exit status 0), the mv command is executed to replace the original file with the temporary file.

If the sed utility detects an error, the original file will not be changed, but after seeing the diagnostic message(s) produced by sed, you may need to manually remove the temporary file.
This User Gave Thanks to Don Cragun For This Post:
linuxUser_
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk/sed Command : Parse parameter file / send the lines to the ksh export command

Sorry for the duplicate thread this one is similar to the one in https://www.unix.com/shell-programming-scripting/88132-awk-sed-script-read-values-parameter-files.html#post302255121 Since there were no responses on the parent thread since it got resolved partially i thought to open the new... (4 Replies)
Discussion started by: rajan_san
4 Replies

2. Shell Programming and Scripting

Loop with sed command to replace line with sed command in it

Okay, title is kind of confusion, but basically, I have a lot of scripts on a server that I need to replace a ps command, however, the new ps command I'm trying to replace the current one with pipes to sed at one point. So now I am attempting to create another script that replaces that line. ... (1 Reply)
Discussion started by: cbo0485
1 Replies

3. UNIX for Dummies Questions & Answers

some help with the sed command please

hi all, attached you can find a small txt file ( .txt ), GIVEN that past_scheduler="islip" and scheduler="mucf" can somebody please tell me WHY sed 's/-u '$past_scheduler'/-u '$scheduler'/g' .txt > .txt.temp fails ? thanx (3 Replies)
Discussion started by: OneDreamCloser
3 Replies

4. Shell Programming and Scripting

Convert Sed command to perl command

Hello, Can any perl experts help me convert my sed string to perl. I am unsuccessful with this. I have to remove this string from html files OAS_AD('Top'); I have come up with this. However the requirement is in perl. for find in $(find . -type f -name "file1.html") ; do cat $find |... (2 Replies)
Discussion started by: abacus
2 Replies

5. UNIX for Dummies Questions & Answers

sed insert command and variable expansion/command substitution

I know this script is crummy, but I was just messing around.. how do I get sed's insert command to allow variable expansion to show the filename? #!/bin/bash filename=`echo $0` /usr/bin/sed '/#include/ { i\ the filename is `$filename` }' $1 exit 0 (8 Replies)
Discussion started by: glev2005
8 Replies

6. UNIX for Advanced & Expert Users

sed command

Hi..... I'm using sed command for replace the words in a file cat >test.txt My test.txt contains Mary had a little ham Mary fried a lot of spam Jack ate a Spam sandwich Jill had a lamb spamwich Marry had a spicy wich $ sed 's/wich$/mirchi/g' test.txt output is: Mary had a little ham... (24 Replies)
Discussion started by: ksrivani
24 Replies

7. Shell Programming and Scripting

sed returns error "sed: -e expression #1, char 18: unterminated `s' command"

Hello All, I have something like below LDC100/rel/prod/libinactrl.a LAA2000/rel/prod/libinactrl.a I want to remove till first forward slash that is outputshould be as below rel/prod/libinactrl.a rel/prod/libinactrl.a How can I do that ??? (8 Replies)
Discussion started by: anand.shah
8 Replies

8. Shell Programming and Scripting

sed Command

Hello, I'm working with this command which I'm having trouble understanding it: sed -e '1,$ s/SUB/N/g' < $1 > file.txt Where SUB stand for an special character with code in ASCII is 0x1A, notepad read it as a right arrow. Any help will be appreciated. (5 Replies)
Discussion started by: emilioveras
5 Replies

9. Shell Programming and Scripting

sed and awk giving error ./sample.sh: line 13: sed: command not found

Hi, I am running a script sample.sh in bash environment .In the script i am using sed and awk commands which when executed individually from terminal they are getting executed normally but when i give these sed and awk commands in the script it is giving the below errors :- ./sample.sh: line... (12 Replies)
Discussion started by: satishmallidi
12 Replies

10. UNIX for Dummies Questions & Answers

Output of sed command to another sed command

Hi All, I'm relatively new to Unix scripting and am trying to get my head around piping. I'm trying to take a header record from one file and prepend it to another file. I've done this by creating several temp files but i'm wondering if there is a cleaner way to do this. I'm thinking... (10 Replies)
Discussion started by: BigCroyd
10 Replies

LEARN ABOUT DEBIAN

fixnt

fixnt(1)							      Debian								  fixnt(1)

NAME

       fixnt - Filter for the Windows NT postscript printer driver.

SYNOPSIS

       fixnt < BADFILE.ps > GOODFILE.ps

DESCRIPTION

       The  Windows  NT  postscript  driver has a tendency to make broken postscript files, that are incompatible with psutils.  fixnt is a filter
       that fixes these problems, allowing the use of psnup(1).

       The filter takes the broken postscript file on stdin, and outputs a fixed postscript file on stdout.  It has no other form  for	invocation
       and takes no options on the command-line.

OPTIONS

       fixnt  takes no options.

BUGS

       fixnt does not check for NTPSOct94.  For a workaround, use a sed(1) command to replace 'NTPSOct94' with 'NTPSOct95', like so:
	      sed 's/NTPSOct94/NTPSOct95/g'
       This is particularly important for Windows NT 3.5 users.

AUTHOR

       fixnt   was   written   by   Holger   Bauer   <Holger.Bauer@topmail.de>,  Michael  Rath	<rath@itsm.uni-stuttgart.de>,  and  Akim  Demaille
       <demaille@inf.enst.fr>.

REPORTING BUGS

       Report bugs to the Authors, but avoid sending large postscript files.

       Patches are always welcome; send to <bauer@itsm.uni-stuttgart.de>.

SEE ALSO

       psnup(1), sed(1)

a2ps								   February 2003							  fixnt(1)
All times are GMT -4. The time now is 10:20 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy