If you have GNU sort you could try the stable sort option (-s):
That would keep the relative order of the 4th column for records with the same first three columns unchanged like you asked.
But your output sample seems to only group the same records without changing the order in which the records appear for the first time. Is that what you are after?
Hi,
I know that to create a pdf file I can use the txt2pdf command.
But if I would change an existing pdf file, by inserting lines in particular positions of this file, what can I use? And How? (3 Replies)
Hi,
We have some clients who will place huge files in to one of the remote server.
And the shell script written in our local server to retrieve client files (using FTP) placed on one of the remote server of ours by clients.
My question Is there any FTP command/script to check from my local... (1 Reply)
Hey everyone,
I need some help for some unix commands.
- List all processes in the file "ProcessUser.txt" sorted by the users and in the file "ProcessName.txt" sorted by the name of the process.
- How much time does the command "ls -alR /" need and compared to that, how much time is... (2 Replies)
Dear friends,
I believe that all unix commands are programs which are written in c language, please correct me if I am wrong. Now suppose that I want to see the c source of common commands like echo, ls, mkdir etc, where I can I find the source, linux is open source I believe, so the source for... (2 Replies)
I have the below requirement. below is the content of the input file and my expected result
Input file: a.txt
<?xml version="1.0" encoding="UTF-8"?>
<Employee>
<Name>XXXX</Name>
<ID>1233</ID>
</Employee>
<?xml version="1.0" encoding="UTF-8"?>
<Employee>
<Name>YYYY</Name>
<ID>1345</ID>... (2 Replies)
Please help me to update a file which contains date values as below:-
From:-
"1912108",20161130,"2016-12-01-00.00.00.000000","2016-12-01-08.37.12.000000"
"1912108",20161201,"2016-12-02-00.00.00.000000","2016-12-02-08.28.22.000000"
To:-
"1912108",2016-11-30,"2016-12-01... (7 Replies)
Dear Forum,
I have a rather large file with a few million lines looking like this:
head -n 5 seq.txt
>KF1.8.1
010011001011100010101110000000
>DF1.6.1
0101000010111010101011111100
>XC1.3.7
010110101011101010110000011
>GG5.1.1
0100011010111010101110001101
>HK1.2.2... (5 Replies)
Discussion started by: GDC
5 Replies
LEARN ABOUT NETBSD
uniq
UNIQ(1) BSD General Commands Manual UNIQ(1)NAME
uniq -- report or filter out repeated lines in a file
SYNOPSIS
uniq [-cdu] [-f fields] [-s chars] [input_file [output_file]]
DESCRIPTION
The uniq utility reads the standard input comparing adjacent lines, and writes a copy of each unique input line to the standard output. The
second and succeeding copies of identical adjacent input lines are not written. Repeated lines in the input will not be detected if they are
not adjacent, so it may be necessary to sort the files first.
The following options are available:
-c Precede each output line with the count of the number of times the line occurred in the input, followed by a single space.
-d Don't output lines that are not repeated in the input.
-f fields
Ignore the first fields in each input line when doing comparisons. A field is a string of non-blank characters separated from adja-
cent fields by blanks. Field numbers are one based, i.e. the first field is field one.
-s chars
Ignore the first chars characters in each input line when doing comparisons. If specified in conjunction with the -f option, the
first chars characters after the first fields fields will be ignored. Character numbers are one based, i.e. the first character is
character one.
-u Don't output lines that are repeated in the input.
If additional arguments are specified on the command line, the first such argument is used as the name of an input file, the second is used
as the name of an output file.
The uniq utility exits 0 on success, and >0 if an error occurs.
COMPATIBILITY
The historic +number and -number options have been deprecated but are still supported in this implementation.
SEE ALSO sort(1)STANDARDS
The uniq utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
BSD January 6, 2007 BSD