Sorry, should have checked my sort parameters the 4th field was supposed to be sorted in descending order to do the sort needs the r flag (not d) so your correct answers are:
For the awk logic: -F\; use semicolon as the field separator, this allows awk to split the line up into $1, $2 ... $NF fields
!($1$2 in A) means only process lines where the value of field1 concatenated with field2 (your unique key) is not already in the array A
print $0 print the entire line
So in prints the first line where each unique key value occurs.
A[$1$2] add value field1 concatenated with field2 to the array A
This User Gave Thanks to Chubler_XL For This Post:
Hi,
I would like to know given that I have 3 columns.
Let say I have first 3 columns to do operation and these operation output is printed out each line by line using AWK and associative array.Currently in the output file, I do a sort by -r for the operation output.
The problem comes to... (1 Reply)
hello..
I have big file and so far I was able to shink it and make smaller with certains values that I need..
vendor1|2000|1
vendor2|1000|1
vendor2|5000|1
vendor2|500|2
vendor3|1000|2
vendor3|500|3
vendor4|500|3
Vendor5|500|1
vendor6|500|3
Vendor7|1000|1
Vendor8|1000|774... (3 Replies)
Hi,
Is there any way to sort a file in cshell by sort command, sorting it by multiple fields, like to sort it first by the second column and then by the first column.
Thanks forhead (1 Reply)
Howdy!
Need to sort a large .txt file containing the following, using sort. First based on the 1st column, and then on the 2nd column:
Group01.01 1000500 31 0.913 -1.522974494
Group01.01 1001500 16 0.684 -0.967496041
Group01.01 36500 19 0.476 na
Group01.02 365500 15 0.400 na... (1 Reply)
hi all,
i have a file , having few columns. i wanted to sort it based on 2nd column and then based on 1st column. But i have some problem in first column.
first column have characters and numbers, but problem is number of characters are not same in all rows. Few rows have 13 characters and then... (3 Replies)
New to unix.
I need to sort the records of a file by a control number field. That field is in POS 16 through 28. How do I do that? There are no delimiters, or spaces to separate fields.
See example below. Each line is a record.
REC1CCYYMMDD0018888888888888ABCDE... (1 Reply)
Hi All,
I have one requirement, where I need to have output of ls -l command sorted on 1) first on filename 2) last modified time ( descending ) - latest change first.
I am not able to figure out how to do it..
Also I dont have a way to change Date display for ls -ltr command..
I am... (1 Reply)
I have /tmp dir with filename as:
010020001_S-FOR-Sort-SYEXC_20160229_2212101.marker
010020001_S-FOR-Sort-SYEXC_20160229_2212102.marker
010020001-S-XOR-Sort-SYEXC_20160229_2212104.marker
010020001-S-XOR-Sort-SYEXC_20160229_2212105.marker
010020001_S-ZOR-Sort-SYEXC_20160229_2212106.marker... (4 Replies)
Discussion started by: gnnsprapa
4 Replies
LEARN ABOUT DEBIAN
dpkg-awk
DPKG-AWK(1) General Commands Manual DPKG-AWK(1)NAME
dpkg-awk - Utility to read a dpkg style db file
SYNOPSIS
dpkg-awk [(-f|--file) filename] [(-d|--debug) ##] [(-s|--sort) list] [(-rs|--rec_sep) ??] '<fieldname>:<regex>' ... -- <out_fieldname> ..
DESCRIPTION
dpkg-awk Parses a dpkg status file (or other similarly formatted file) and outputs the resulting records. It can use regex on the field
values to limit the returned records, it can also be told which fields to output, and it can sort the matched fields.
OPTIONS -f filename
--file filename
The file to parse. The default is /var/lib/dpkg/status.
-d [#]
--debug [#]
Each time this is specified, it increased the debug level.
-s field(s)
--sort field(s)
A space or comma separated list of fields to sort on.
-n field(s)
--numeric field(s)
A space or comma separated list of fields that should be interpreted as numeric in value.
-rs ??
--rec_sep ??
Output this string at the end of each output paragraph.
-h
--help Display some help.
fieldname
The fields from the file, that are matched with the regex given. The fieldnames are case insensitive.
out_fieldname
The fields from the file, that are output for each record. If the first field listed begins with ^, then the list of fields that
follows will NOT be output.
BUGS
Be warned that the author has only a shallow understanding of the dpkg packaging system, so there are probably tons of bugs in this pro-
gram.
This program comes with no warranties. If running this program causes fire and brimstone to rain down upon the earth, you will be on your
own.
This program accesses the dpkg database directly in places, querying for data that cannot be gotten via dpkg.
AUTHOR
Adam Heath <doogie@debian.org>
DEBIAN Debian Utilities DPKG-AWK(1)