Actually, what I'm trying to do is remove duplicate pairs from a file like this:
I find out it doesn't really work if I redirect the file into a while-loop that uses read to read a line, like this:
I got the idea because while read works line by line from the beginning of the file the swapped line is always located behind the other one so if I remove it read will never see it. But apparently the entire original file is still available to read no matter what I remove.
Is there is a better approach?
Assuming the fields in your input file are whitespace separated, you could try this approach:
These 2 Users Gave Thanks to Scrutinizer For This Post:
Hi All,
Very need help about format syntax on solaris 10.
I have done install Solaris 10 OS on sun fire v245 but currently i have a problem to use "format" command to display partition info for my hard drive.
i cannot enter the format menu, below is captured display :
# format
Searching... (7 Replies)
Hi all,
Just subscribed to this forum. Not a regular user of Unix.:)
I did the following:
We have a directory structure /a/b/c5/
Where c5 is the only directory inside b.
export ANOOP=/a/b/c*/
echo $ANOOP=/a/b/c5/
I have to create a symbolic link to anoop.txt in the directory... (2 Replies)
Hiii... There...
I am making a Script in which I am taking the value of a variable "var"
through key board.
But I want, if no values are supplied for "var" for more than 5 seconds then script shuld automatically exit.Script is as follow :
#cat abc
#!/bin/bash
echo "Enter Your Choice : "... (4 Replies)
I am looking at installing PiKdev which needs libqt3-mt and kdelibs4-dev. The installed package is qt-r1008952-i486-1 which claims to be a gui toolkit. find / -name "*libqt*" yields nothing with mt just a lot of support, compatible, and access widgets. Normally I would consider this a no go but... (0 Replies)
Hi,
I am a little bit confusing of using find command.
Actually, I am planning to delete the files whatever the files are existing in the day before yesterday. So, I am writing the command like this.
find . -name "*.txt" -ctime -2 { here I am confusing, if I will use +2 or +1 also I am... (5 Replies)
Sed garbled error. Cannot determine why the sed command to insert a line at the beginning of a file will not work on declared variables.
outfile='DAR.V2.2012115.1.CSV'
testfile='totality_request.sql'
header_prefix='DATA FILE'
no_ext_file=`echo $outfile |sed 's/\(.*\)..../\1/'`
... (6 Replies)
I'm trying to extract a subject from a mail message but my subject example has 2 lines. How can I manage to extract it and write a string at the end of it?
Consider this example:
From: test@domain.com
Subject: Re: U =?ISO-8859-1?Q?qu=EA=3F!=3F!=3F!!_wtff_=E7=E3o_=ED=F3?=
... (6 Replies)
Hi,
I ran a script named cat item
when I searched for this script using command PS
I get two process . I don't understand this. Also this script has run for 15 minutes but the time is showing as 0:00:confused::confused:
ps -ef | grep cat_item
catmgr 4508 4486 0 05:10:29 ? 0:00... (5 Replies)
1. increase file space
first, double space a file:
awk '1;{print ""}'
I probably can understand it:print a blank line every time.But when I read triple space a file I am confused:
awk '1;{print "\n"}'
doesn't it meaning print a blank line every time too?
2. number each line of file, but... (6 Replies)
Discussion started by: hhdzhu
6 Replies
LEARN ABOUT OSF1
merge
merge(1)merge(1)NAME
merge - three-way file merge
SYNOPSIS
merge [-Llabel1 [-Llabel3]] [-p] [-q] file1 file2 file3
DESCRIPTION
merge incorporates all changes that lead from file2 to file3 into file1. The result goes to standard output if -p is present, into file1
otherwise. merge is useful for combining separate changes to an original. Suppose file2 is the original, and both file1 and file3 are
modifications of file2. Then merge combines both changes.
An overlap occurs if both file1 and file3 have changes in a common segment of lines. On a few older hosts where diff3 does not support the
-E option, merge does not detect overlaps, and merely supplies the changed lines from file3. On most hosts, if overlaps occur, merge out-
puts a message (unless the -q option is given), and includes both alternatives in the result. The alternatives are delimited as follows:
<<<<<<< file1 lines in file1 ======= lines in file3 >>>>>>> file3
If there are overlaps, the user should edit the result and delete one of the alternatives. If the -L label1 and -L label3 options are
given, the labels are output in place of the names file1 and file3 in overlap reports.
DIAGNOSTICS
Exit status is 0 for no overlaps, 1 for some overlaps, 2 for trouble.
IDENTIFICATION
Author: Walter F. Tichy.
Revision Number: 1.1.6.2; Release Date: 1993/10/07.
Copyright (C) 1982, 1988, 1989 by Walter F. Tichy.
Copyright (C) 1990, 1991 by Paul Eggert.
SEE ALSO diff3(1), diff(1), rcsmerge(1), co(1)merge(1)