Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Remove empty line and the next one

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Remove empty line and the next one
# 1  
Old 06-14-2011
Remove empty line and the next one
Hi all,

I'm trying to remove when this condition is met: an empty and the next one
I'm using this command:
Code:
sed '/^$/N; s/&//' file

Which searches for an empty line, N attaches it to the next line, and substituing the combination with nothing.... but it is not working.

What I'm missing here?

---------- Post updated at 11:29 AM ---------- Previous update was at 11:09 AM ----------

ok, solved
if anyone is interested:

Code:
sed '/^$/ {N;d}' filename

Last edited by Scott; 06-14-2011 at 02:24 PM.. Reason: Please use code tags
# 2  
Old 06-14-2011
Works if you match the newline embedded in the pattern...and delete not substitute.

The sed on my system complains about your command but this works on mine.
Code:
sed '/^$/N;/\n/d' file

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to remove empty line.?

Hi gurus, I have a script which works fine. https://www.unix.com/shell-programming-and-scripting/239347-how-pass-string-into-sql-query.html while read p do && para="'${p}'" || para="${para},'${p}'" done < filePlease use code tags as required by forum rules! a few days... (6 Replies)
Discussion started by: ken6503
6 Replies

2. UNIX for Dummies Questions & Answers

Using awk to remove duplicate line if field is empty

Hi all, I've got a file that has 12 fields. I've merged 2 files and there will be some duplicates in the following: FILE: 1. ABC, 12345, TEST1, BILLING, GV, 20/10/2012, C, 8, 100, AA, TT, 100 2. ABC, 12345, TEST1, BILLING, GV, 20/10/2012, C, 8, 100, AA, TT, (EMPTY) 3. CDC, 54321, TEST3,... (4 Replies)
Discussion started by: tugar
4 Replies

3. Shell Programming and Scripting

Need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line...

Hello, I need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line... An example of entries in the file would be: SRVXPAPI001 ERRO JUN24 07:28:34 1775 REASON= 0000, PROCID= #E506 #1065: TPCIPPR, INDEX= 003F ... (8 Replies)
Discussion started by: Ferocci
8 Replies

4. Shell Programming and Scripting

Remove CR only on empty lines

Dear community, I have two output files that contains some CR # cat first.out 1234567890 598679857648566 9 1234567234 365837465873465 4 2342343243 289374982374894 4 # cat second.out 2342342342 ... (2 Replies)
Discussion started by: Lord Spectre
2 Replies

5. Shell Programming and Scripting

Remove empty records

Hello: Is there a simple way to remove empty records of FASTA format file? A FASTA format consists of two parts: header and sequence (for non-biologist, Wiki for details of course!). The header always start with ">" for the name of the sequence. The header must be in this ONLY single line.... (9 Replies)
Discussion started by: yifangt
9 Replies

6. UNIX for Dummies Questions & Answers

remove empty field

Hi all ! I'm sure it is a basic question but I didn't find any threads that fit my need. How to remove empty fields with awk? Or in other words, how to shift all the fields after an empty field on the left? input: 1|2||3|4|5||6 wanted: 1|2|3|4|5|6 I tried: awk '{for(i=1; i<=NF;... (7 Replies)
Discussion started by: lucasvs
7 Replies

7. Shell Programming and Scripting

Fill the empty line by adding line before blank line

FIle A "A" 2 aa 34 3 ac 5 cd "B" 3 hu 67 4 fg 5 gy output shud be A"" 2 aa 34 "A" 3 ac 34 "A" 5 cd 34 "B" 3 hu 67 "B" 4 fg 67 "B" 5 gy 67 (6 Replies)
Discussion started by: cdfd123
6 Replies

8. Shell Programming and Scripting

using vi -c to remove empty lines

Hello: I searched here for "vi -c" but found no hits. How can I use vi -c to remove ALL empty lines, regardless of how many? I tried <code> vi -c ":g/^$/d | wq" filename </code> but I have to run it several times. This is NOT homework. :) Thanks for your time. (3 Replies)
Discussion started by: Habitual
3 Replies

9. UNIX for Dummies Questions & Answers

Remove only Empty Directories

I know this one was answered before in forum below - https://www.unix.com/unix-dummies-questions-answers/58210-removing-empty-folders-using-find-command.html But that one is closed & I have a question so here it goes. I want to delete all 2006 files. Now if along with the files, if the... (2 Replies)
Discussion started by: kedar.mehta
2 Replies

10. Shell Programming and Scripting

remove empty directory

Hi, I need to delete an empty directory in a temp directory except "dir5" (keep everything that is not empty). Plese advise. Here is an example of my directory. /dir/temp/ dir1 - delete if this is empty dir2 - delete if this is empty dir3 - delete if this is empty dir4 - delete if this... (7 Replies)
Discussion started by: sirrtuan
7 Replies
Login or Register to Ask a Question