Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: sed or awk delete character in the lines before and after the matching line
Top Forums Shell Programming and Scripting sed or awk delete character in the lines before and after the matching line Post 302596547 by jacobs.smith on Tuesday 7th of February 2012 05:49:05 PM
Old 02-07-2012
Quote:
Originally Posted by Scrutinizer
Try something like this:
Code:
awk '/PRIMARY INDEX/{sub(/.$/,x,p);print p RS $0;getline;sub(/^./,z);print;next}p{print p}{p=$0}' infile

Could you please explain the logic?

Thanks.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Matching multiples of a single character using sed and awk

Hi, I have a file 'imei_01.txt' having the following contents: $ cat imei_01.txt a123456 bbr22135 yet223 where I want to check whether the expression 'first single alphabet followed by 6 digits' is present in the file (here it is the first record 'a123456') I am using the following... (5 Replies)
Discussion started by: royalibrahim
5 Replies

2. Shell Programming and Scripting

sed find matching pattern delete next line

trying to use sed in finding a matching pattern in a file then deleting the next line only .. pattern --> <ad-content> I tried this but it results are not what I wish sed '/<ad-content>/{N;d;}' akv.xml > akv5.xml ex, <Celebrant2First>Mickey</Celebrant2First> <ad-content> Minnie... (2 Replies)
Discussion started by: aveitas
2 Replies

3. Shell Programming and Scripting

sed/awk: Delete matching words leaving only the first instance

I have an input text that looks like this (comes already sorted): on Caturday 22 at 10:15, some event on Caturday 22 at 10:15, some other event on Caturday 22 at 21:30, even more events on Funday 23 at 11:00, yet another event I need to delete all the matching words between the lines, from... (2 Replies)
Discussion started by: GrinningArmor
2 Replies

4. Shell Programming and Scripting

Delete character in determinate position with sed/awk

Hello. I'm trying to delete one character in determinate position. Example: qwEtsdf123Ecv34 <delete character in positión 3> Result: qwtsdf123Ecv34 Plase, help me. Thanks (4 Replies)
Discussion started by: maria_florencia
4 Replies

5. Shell Programming and Scripting

Sed/awk to delete single lines that aren't touching other lines

Hello, I'm trying to figure out how to use sed or awk to delete single lines in a file. By single, I mean lines that are not touching any other lines (just one line with white space above and below). Example: one two three four five six seven eight I want it to look like: (6 Replies)
Discussion started by: slimjbe
6 Replies

6. Shell Programming and Scripting

Sed: delete on each line before a character and after a character

Hi there, A total sed noob here. Is there a way using sed to delete everything before a character AND after another character on each line in a file? The deletion should also delete the indicating characters(here: an opening and a closing parenthesis). The original file would look like... (3 Replies)
Discussion started by: bnbsd
3 Replies

7. Shell Programming and Scripting

Need awk/sed command to pull out matching lines from a block

Hi, In order to make our debugging easier in log files, I need this script. My log file will be structured like this : ------Invoking myfile -param:start_time=1371150900000 -param:end_time=1371151800000 for 06/14/2013 <multiple lines here> ..... - Step Sybase CDR Table.0 ended... (3 Replies)
Discussion started by: Lakshmikumari
3 Replies

8. Shell Programming and Scripting

Replacing lines matching a multi-line pattern (sed/perl/awk)

Dear Unix Forums, I am hoping you can help me with a pattern matching problem. What am I trying to do? I want to replace multiple lines of a text file (that match a multi-line pattern) with a single line of text. These patterns can span several lines and do not always have the same number of... (10 Replies)
Discussion started by: thefang
10 Replies

9. Shell Programming and Scripting

How to delete a character using sed and or awk?

Hi, 1/ i have file test.txt 1 Jul 28 08:35:29 2014-07-28 Root::UserA 1 Jul 28 08:36:44 2014-07-28 Root::UserB i want to delete the seconds of the file, and the Root:: and the output will be: 1 Jul 28 08:35 2014-07-28 UserA 1 Jul 28 08:36 2014-07-28 UserB 2/i have another file test2.txt:... (8 Replies)
Discussion started by: fxsme
8 Replies

10. Shell Programming and Scripting

Seemingly simple sed, delete between matching lines

There are many matching blocks of text in one file that need to be deleted. This example below is one block that needs to be either deleted or replaced with an empty line. This text below is the input file. The ouput file should be empty Searching Checks. Based on search criteria name: Value :... (2 Replies)
Discussion started by: bash_in_my_head
2 Replies

LEARN ABOUT CENTOS

btrfs-debug-tree

BTRFS-DEBUG-TREE(8)					      System Manager's Manual					       BTRFS-DEBUG-TREE(8)

NAME

       btrfs-debug-tree - dump Btrfs filesystem metadata into stdout.

SYNOPSIS

       btrfs-debug-tree [options] <device>

DESCRIPTION

       btrfs-debug-tree  is used to dump the whole tree of the given device.  This is maybe useful for analyzing filesystem state or inconsistence
       and has a positive educational effect on understanding the internal structure.  device is the device file where the filesystem is stored.

       Options

       -e   print detailed extents info.

       -d   print info of btrfs device and root tree dirs only.

       -r   print info of roots only.

       -b <block_num>
	    print info of the specified block only.

EXIT CODE

       btrfs-debug-tree will return 0 if no error happened.  If any problems happened, 1 will be returned.

AUTHOR

       Written by Shilong Wang and Wenruo Qu.

COPYRIGHT

       Copyright (C) 2013 Fujitsu, Inc.  License GPLv2: GNU GPL version 2 <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

       mkfs.btrfs(8)

															       BTRFS-DEBUG-TREE(8)
All times are GMT -4. The time now is 05:24 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy