Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Insert at the beginning of odd lines
Top Forums Shell Programming and Scripting Insert at the beginning of odd lines Post 302698607 by bakunin on Monday 10th of September 2012 10:15:09 AM
Old 09-10-2012
Read in two lines at once with the "N" subcommand, then insert after the "\n", which is the newline separating the lines:

Code:
sed 'N;s/\n/&=changes here=/p'

In case of files with uneven numbers of lines you will have to introduce a special rule for the last line ("$"), otherwise the last line will not be printed.

I hope this helps.

bakunin
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Insert two strings at the beginning and at the end of each line of a file

Hi, excuse me for my poor english. My problem is that: I have a File i want to add to each line of that file two strings: one at the beginning of the line, one at the ending. string1="abcd" string2="efgh" i want $string1 content $string2 for each line. Is that possible? (3 Replies)
Discussion started by: Linux-fueled
3 Replies

2. Shell Programming and Scripting

print ODD lines

i want to print ODD lines like first ,third then fifth and so on 234,567,ABC,KJL 234,565,ABD,KJL 234,568,ABE,KJL 234,560,ABF,KJL 234,563,ABG,KJL 234,562,ABH,KJL O/P will be like 234,567,ABC,KJL ----->first liine 234,568,ABE,KJL ----->third line 234,563,ABG,KJL ----->fifth line... (6 Replies)
Discussion started by: aaysa123
6 Replies

3. Shell Programming and Scripting

Need to insert text(constant) at the beginning of file

I am very new to scripting and I know this request is simple but I am having no luck with it. I have a file a.dat with the following data in it. aa bb cc dd I need to run a script that will take each line of a.dat and put dsjc/ubin/ in front of each record, so the output looks like ... (2 Replies)
Discussion started by: jclanc8
2 Replies

4. Shell Programming and Scripting

SED - insert space at the beginning of line and multi replace command

hi I am trying to use SED to replace the line matching a pattern using the command sed 'pattern c\ new line ' <file1 >file 2 I got two questions 1. how do I insert a blank space at the beginning of new line? 2. how do I use this command to execute multiple command using the -e... (5 Replies)
Discussion started by: piynik
5 Replies

5. Shell Programming and Scripting

Insert output from a file to beginning of line with sed

Hi I've been trying to search but couldn't quite get the answer I was looking for. I have a a file that's like this Time, 9/1/12 0:00, 1033 0:10, 1044 ... 23:50, 1050 How do I make it so the file will be like this? 9/1/12, 0:00, 1033 9/1/12, 0:10, 1044 ... 9/1/12, 23:50, 1050 I... (4 Replies)
Discussion started by: diesel88
4 Replies

6. Shell Programming and Scripting

Sum product of even/odd lines

Hi, I have a text file like this 6.0000E-02 0.00000E+00 0.0000 0.00000E+00 0.0000 7.0000E-02 5.00000E-10 1.0000 5.00000E-10 1.0000 8.0000E-02 3.00000E-09 0.4082 3.00000E-09 0.4082 9.0000E-02 3.50000E-09 0.3780 3.50000E-09 0.3780 1.0000E-01 1.00000E-09... (2 Replies)
Discussion started by: f_o_555
2 Replies

7. Shell Programming and Scripting

Insert text at the beginning of every even number line

i am trying to insert text at the beginning of every even number line with awk i can do it with odd number lines with this command awk 'NR%2{$0="some text "$0}1' filehow can i edit this command thanks (5 Replies)
Discussion started by: bob123
5 Replies

8. UNIX for Dummies Questions & Answers

Replace character in odd or even lines

Hello, I'm here again asking for your precious help. I'm writing some code to convert csv files to html. I want to highlight header and also I want to have rows with alternate colors. So far this is my work###Let's format first line only with some color cat $fileIN".tmp1" | sed '1... (7 Replies)
Discussion started by: emare
7 Replies

9. UNIX for Advanced & Expert Users

Insert a column in the beginning

Hi, I have been trying to see how i can insert a column in the beginning to my html table This is how it looks Name Age Sid 32 John 33 Mary 34 I want to insert a column Job before Name column, so it looks like Job Name Age IT Sid 32 Doctor... (3 Replies)
Discussion started by: sidnow
3 Replies

10. UNIX for Beginners Questions & Answers

How to use sed to insert character in the beginning of file path?

I need to manipulate one Database file on Solaris 11 in which contains more than 5000 lines of data file path like this: '/data1/oradata/DBNAME/system01.dbf', '/data7/oradata/DBNAME/undotbs1_01.dbf', '/data1/oradata/DBNAME/sysaux01.dbf', '/data28/oradata/DBNAME/userdata01.dbf', ... (6 Replies)
Discussion started by: duke0001
6 Replies

LEARN ABOUT LINUX

nl

NL(1)								   User Commands							     NL(1)

NAME

       nl - number lines of files

SYNOPSIS

       nl [OPTION]... [FILE]...

DESCRIPTION

       Write each FILE to standard output, with line numbers added.  With no FILE, or when FILE is -, read standard input.

       Mandatory arguments to long options are mandatory for short options too.

       -b, --body-numbering=STYLE
	      use STYLE for numbering body lines

       -d, --section-delimiter=CC
	      use CC for separating logical pages

       -f, --footer-numbering=STYLE
	      use STYLE for numbering footer lines

       -h, --header-numbering=STYLE
	      use STYLE for numbering header lines

       -i, --line-increment=NUMBER
	      line number increment at each line

       -l, --join-blank-lines=NUMBER
	      group of NUMBER empty lines counted as one

       -n, --number-format=FORMAT
	      insert line numbers according to FORMAT

       -p, --no-renumber
	      do not reset line numbers at logical pages

       -s, --number-separator=STRING
	      add STRING after (possible) line number

       -v, --starting-line-number=NUMBER
	      first line number on each logical page

       -w, --number-width=NUMBER
	      use NUMBER columns for line numbers

       --help display this help and exit

       --version
	      output version information and exit

       By default, selects -v1 -i1 -l1 -sTAB -w6 -nrn -hn -bt -fn.  CC are two delimiter characters for separating logical pages, a missing second
       character implies :.  Type \ for .  STYLE is one of:

       a      number all lines

       t      number only nonempty lines

       n      number no lines

       pBRE   number only lines that contain a match for the basic regular expression, BRE

       FORMAT is one of:

       ln     left justified, no leading zeros

       rn     right justified, no leading zeros

       rz     right justified, leading zeros

AUTHOR

       Written by Scott Bartram and David MacKenzie.

REPORTING BUGS

       Report nl bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report nl translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2010 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The full documentation for nl is maintained as a Texinfo manual.  If the info and nl programs are properly installed at your site, the com-
       mand

	      info coreutils 'nl invocation'

       should give you access to the complete manual.

GNU coreutils 8.5						   February 2011							     NL(1)
All times are GMT -4. The time now is 09:13 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy