Visit Our UNIX and Linux User Community


How to append line with sed?


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting How to append line with sed?
# 1  
Old 10-17-2010
How to append line with sed?

Input:
Code:
gstreamer-plugins-good
gstreamer-plugins-bad
gstreamer-plugins-ugly

Output should be:
Code:
gstreamer-plugins-good gstreamer-plugins-bad gstreamer-plugins-ugly

How can it be done with sed?
# 2  
Old 10-17-2010
Hi.

Try:

Code:
$ sed -e :h -e '$! N; s/\n/ /; th' file
gstreamer-plugins-good gstreamer-plugins-bad gstreamer-plugins-ugly

# 3  
Old 10-17-2010
Quote:
Originally Posted by scottn
Hi.

Try:

Code:
$ sed -e :h -e '$! N; s/\n/ /; th' file
gstreamer-plugins-good gstreamer-plugins-bad gstreamer-plugins-ugly

What does the $! do here?
If i remove it it displays the same result.

And is it possible to do the same thing without using a label and jump?
# 4  
Old 10-17-2010
Code:
tr "\n" " " < file

# 5  
Old 10-19-2010
Code:
# cat file
gstreamer-plugins-good
gstreamer-plugins-bad
gstreamer-plugins-ugly

Code:
# sed -e :a -e 'N;s/\n/ /' -e 'ta' file
gstreamer-plugins-good gstreamer-plugins-bad gstreamer-plugins-ugly



---------- Post updated at 12:41 PM ---------- Previous update was at 12:28 PM ----------

Quote:
Originally Posted by cola
What does the $! do here?
If i remove it it displays the same result.

And is it possible to do the same thing without using a label and jump?
1-) actually i think all the same things..because $! --> means dont process for last line and go for others..already there is not a newline after the last line..
2-) without using a label and jump --> is not successfull if you use without label then result is process just every two lines.


regards
ygemici

Last edited by ygemici; 10-20-2010 at 04:30 AM..
# 6  
Old 10-19-2010
Quote:
Originally Posted by cola
What does the $! do here?
If i remove it it displays the same result.

And is it possible to do the same thing without using a label and jump?
$! N is the same as $!N, which means append the next line except when on the last line. This is for older seds that have a bug if I'm not mistaken. I think for most seds you can just use N

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

sed command to append word at end of line

hello Team, I am looking for sed command or script which will append word at end of line. for example. I want to validate particular filesystem with mount |<filesystem name> command. if nodev parameter is not there then it should add in the fstab file with receptive to the filesystem. # mount... (8 Replies)
Discussion started by: ghpradeep
8 Replies

2. Shell Programming and Scripting

Using sed to find and append or insert on SAME line

Hi, $ cat f1 My name is Bruce and my surname is I want to use SED to find “Bruce” and then append “ Lee” to the end of the line in which “Bruce” is found Then a more tricky one…. I want to INSERT ….a string… in to a line in which I find sometihng. So example $ cat f2 My name is... (9 Replies)
Discussion started by: Imre
9 Replies

3. Shell Programming and Scripting

sed - append line after block

Hi, I posted in another section, but no reply yet. I have an ini file with sections denoted as follows (for example) blah=blah blee=blee bloo=bloo blur=blur blaa=blaa I have ksh script that needs to append a line ${line} to the end of section ${section} I saw this... (7 Replies)
Discussion started by: andyatit
7 Replies

4. Shell Programming and Scripting

SED and Solaris Append line to the end of File does not work

Hello, I have to add a new line at the end of a File on Solaris-System: I think my script should be right, because I evaluated it to other threads. However the script does not what I am expected it should do. My file might look like this: Line1 Line2 Line3 And my script could... (7 Replies)
Discussion started by: Timo_HR
7 Replies

5. Shell Programming and Scripting

sed to append on specific line in password file

I have the a group file and my ftp group line looks like this ... (3 Replies)
Discussion started by: slufoot80
3 Replies

6. Shell Programming and Scripting

sed append without using new line

im trying to append to the end of the line using sed but I want to do it without creating a new line the text to which I want to append is all in capital letters. I want to do something like this: LINE]Foo but when I do this: //a\ ] Foo it prints foo on a new line: LINE ]Foo ... (11 Replies)
Discussion started by: mrjavoman
11 Replies

7. UNIX for Dummies Questions & Answers

sed - append text to every line

Hi all I tried this on an old version of sed on NCR Unix MP-RAS: sed -e "s/$/nnn/" file1 >file2 This file (file1): the cat sat on the mat. the cat sat on the mat. the cat sat on the mat. becomes this (file2): the cat sat on the mat.nnn the cat sat on the mat.nnn nnn the... (3 Replies)
Discussion started by: jgrogan
3 Replies

8. Shell Programming and Scripting

Sed : identify a pattern and append a word at the end of a line

Hello to all, On aix, I want to identify a term on a line in a file and then add a word at the end of the line identified. I do not want the word to be added when the line contains the symbol "#". I use the following command, but it deletes the term identified then adds the word. #sed... (4 Replies)
Discussion started by: dantares
4 Replies

9. UNIX for Dummies Questions & Answers

using sed to append text to the end of each line

Anyone know how to use SED to append a comma to the end of each line example: field1,field2,field3,field4 If i Cat /textfile ---- How can i append the end of /textfile with a comman? (8 Replies)
Discussion started by: Redg
8 Replies

10. Shell Programming and Scripting

Using SED to append character to each line

Hey - my first post here, and I'm a total SED newb. I've looked around for previous help on this, but have so far been unsuccessful. I have a program (AMStracker for OS X) that outputs data in the terminal. Output is in this form: . . . 3 0 -75 3 0 -76 3 0 -77 ... (4 Replies)
Discussion started by: c0nn0r
4 Replies

Featured Tech Videos