I have a file which has some lines starting with a particular word. I would like to delete 5 lines before each such line containing that particular word.
eg:
line1
line2
line3
line4
line5
line6
"particular word"...
I would like to delete line2-line6 and all such occurences in that... (4 Replies)
Hi there
I have a file with a variable amount of rows but the 45th, 46th and 47th charachter of each line is the status field which is a three digit code ie 001, 002, 003 etc. My question is this..I need to strip all the records/lines with 002's out of the file completely and put them into... (14 Replies)
When restoring a file in my uninstall program I need to remove the lines I added to a file during the install. In between the file can be modified by the users.
Assume file1 is as follow:
xxx str2 xxxx
.....
...The Following lines containing str* have to be removed...
xxx str1 xxxx
xxx ... (17 Replies)
are there any basic commands that can display lines 99 - 101 of the /etc/passwd file?
I'm thinking use of head and tail, but I forget what numbers to use and where to put /etc/passwd in the command. (2 Replies)
Hello All,
I am new to this forum. I am currently facing a problem in manipulating files.
I have two files called old-matter and new-matter
# cat old-matter
abc: this, is a, sample, entry
byi: white board, is white in color
rtz: black, board is black
qty: i tried, a lot
asd: no... (1 Reply)
Hi,
I have a file named Mani.txt. The contents are like this
cat Mani.txt
--------------------------------------------------------
Hi there how r u
My Name is Mani
Bye
------------------------------------------------------------
I want to cut the first and last lines from the file... (15 Replies)
Hi,
I have a file which contains DDL statements- CREATE TABLE, CREATE INDEX, ALTER TABLE etc.
I have to only pick CREATE TABLE statements from the file-
Source :
----------------------------------------------
--DDL for table abc
--------------------------------------------
CREATE TABLE... (4 Replies)
Hi,
I have one file, say file 1, that has data like below where 19900107 is the date,
19900107 12 144 129 0.7380047
19900108 12 168 129 0.3149017
19900109 12 192 129 3.2766666E-02
... (3 Replies)
This could be a really dummy question.
I have a log text file.
What unix command to extract line from specific string to another specific string.
Is it something similar to?:
more +/"string" file_name
Thanks (4 Replies)
Hello All,
this is my first post so I don't know if I am doing this right.
I would like to append entries from a series of strings (contained in a text file) consecutively at the end of specifically labeled lines in another file.
As an example:
- the file that contains the values to be... (3 Replies)
Discussion started by: gus74
3 Replies
LEARN ABOUT MOJAVE
english
English(3pm) Perl Programmers Reference Guide English(3pm)NAME
English - use nice English (or awk) names for ugly punctuation variables
SYNOPSIS
use English;
use English qw( -no_match_vars ) ; # Avoids regex performance penalty
# in perl 5.16 and earlier
...
if ($ERRNO =~ /denied/) { ... }
DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get
triggered just by accessing them (like $0) will still be affected.
For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be
referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module.
See perlvar for a complete list of these.
PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if
your code is to run on perl 5.18 or earlier.
This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters
in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing
use English qw( -no_match_vars ) ;
. It is especially important to do this in modules to avoid penalizing all applications which use them.
perl v5.18.2 2014-01-06 English(3pm)