Sponsored Content
Full Discussion: Duplicate removal
Top Forums UNIX for Advanced & Expert Users Duplicate removal Post 302807589 by duplicate on Wednesday 15th of May 2013 03:24:37 AM
Old 05-15-2013
Thanks Vidya,

can you please explain what does this mean(functionality) :awk '!A

Code:
awk '!A[substr($0,3,9)substr($0,14,17)substr($0,44,16)substr($0,60,9)substr($0,153,11)]++' filename


Last edited by Scott; 11-25-2013 at 05:10 AM.. Reason: Code tags
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Removal

I am using Unix as my OS on my server and would like to format my hard drive. How do I go about wiping my hard drive or is there a removal tool that I can use? (1 Reply)
Discussion started by: anaconda
1 Replies

2. UNIX for Dummies Questions & Answers

Removal of Data

Hi All, (And first up, a Happy New Year to you all! 363 days to go!) I need to make sure that our old Sun Sparcstations and Servers are clear of any Confidential data before I return them... Suggestions? I'm formatting the discs to make sure that there's nothing obvious, but would... (5 Replies)
Discussion started by: geralex
5 Replies

3. UNIX for Dummies Questions & Answers

Sort, duplicate removal - Query

Hi All, I have a problem with the sort and duplicate filter command I am using in one of my scripts. I have a '|' delimited file and want to sort and remove duplicates on the 1,2,15 fields. These fields constitute the primary key of the table I will be loading the data into. But I see that some... (4 Replies)
Discussion started by: novice1324
4 Replies

4. Shell Programming and Scripting

Removal of Duplicate Entries from the file

I have a file which consists of 1000 entries. Out of 1000 entries i have 500 Duplicate Entires. I want to remove the first Duplicate Entry (i,e entire Line) in the File. The example of the File is shown below: 8244100010143276|MARISOL CARO||MORALES|HSD768|CARR 430 KM 1.7 ... (1 Reply)
Discussion started by: ravi_rn
1 Replies

5. Homework & Coursework Questions

removal of files?

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: remove all files and only files that the first three characters start with numerals. 2. Relevant commands,... (6 Replies)
Discussion started by: linuxtraining
6 Replies

6. Shell Programming and Scripting

\n removal between two |

I have a multi-line string I'm trying to do some clean-up on. Example: 1|575|67866|"fgnhdgj"|"afhgajh agfajgf ahfjhgfk ahfkhf"|568 2|56|5435|"mayank"|"gupta gdja agdjagf"|677 3|5666|5435|"mayank"|"gupta gdja agdjagf"|677 I need a shell script that replace all \n under " ". (11 Replies)
Discussion started by: mayankgupta18
11 Replies

7. Shell Programming and Scripting

Find duplicate based on 'n' fields and mark the duplicate as 'D'

Hi, In a file, I have to mark duplicate records as 'D' and the latest record alone as 'C'. In the below file, I have to identify if duplicate records are there or not based on Man_ID, Man_DT, Ship_ID and I have to mark the record with latest Ship_DT as "C" and other as "D" (I have to create... (7 Replies)
Discussion started by: machomaddy
7 Replies

8. Shell Programming and Scripting

Duplicate line removal matching some columns only

I'm looking to remove duplicate rows from a CSV file with a twist. The first row is a header. There are 31 columns. I want to remove duplicates when the first 29 rows are identical ignoring row 30 and 31 BUT the duplicate that is kept should have the shortest total character length in rows 30... (6 Replies)
Discussion started by: Michael Stora
6 Replies

9. Web Development

Vbseo removal

first off i want to thank you for such a great site, you helped me narrow down a long search on what was wrong with my forum, i have a large forum motorbicycling DOT com which i had someone remove vbseo before they went under because of all the security problems. anyway i have lots of 404 errors... (13 Replies)
Discussion started by: atcspaul
13 Replies

10. Shell Programming and Scripting

Honey, I broke awk! (duplicate line removal in 30M line 3.7GB csv file)

I have a script that builds a database ~30 million lines, ~3.7 GB .cvs file. After multiple optimzations It takes about 62 min to bring in and parse all the files and used to take 10 min to remove duplicates until I was requested to add another column. I am using the highly optimized awk code: awk... (34 Replies)
Discussion started by: Michael Stora
34 Replies
fwtmp(1M)																 fwtmp(1M)

NAME
fwtmp, wtmpfix - manipulate connect accounting records SYNOPSIS
[files] DESCRIPTION
fwtmp reads from the standard input and writes to the standard output, converting binary records of the type found in to formatted ASCII records. The ASCII version is useful to enable editing, via ed(1), bad records or for general purpose maintenance of the file. The argument is used to denote that input is in ASCII form, and output is to be written in binary form. The arguments and are independent, respectively specifying ASCII input and binary output. Therefor, is an ASCII to ASCII copy and is a binary to binary copy. should be used for reading If is not used, structure is read. wtmpfix examines the standard input or named files in format, corrects the time/date stamps to make the entries consistent, and writes to the stan- dard output. A can be used in place of files to indicate the standard input. If time/date corrections are not performed, will fault when it encounters certain date-change records. Each time the date is set, a pair of date change records is written to The first record is the old date denoted by the string old time placed in the line field and the flag placed in the type field of the structure. The second record specifies the new date, and is denoted by the string placed in the line field and the flag placed in the type field. uses these records to synchronize all time stamps in the file. nullifies date change records when writing to the standard output by setting the time field of the structure in the old date change record equal to the time field in the new date change record. This prevents and from factoring in a date change record pair more than once. In addition to correcting time/date stamps, wtmpfix checks the validity of the name field to ensure that it consists solely of alphanumeric characters or spaces. If it encounters a name that is considered invalid, it changes the login name to and writes a diagnostic to the standard error. This minimizes the risk that will fail when processing connect accounting records. DIAGNOSTICS
wtmpfix generates the following diagnostics messages: WARNINGS
generates no errors, even on garbage input. FILES
SEE ALSO
ed(1), acct(1M), acctcms(1M), acctcom(1M), acctcon(1M), acctmerg(1M), acctprc(1M), acctsh(1M), runacct(1M), acct(2), acct(4), utmp(4), wtmps(4). STANDARDS CONFORMANCE
fwtmp(1M)
All times are GMT -4. The time now is 08:54 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy