I am working with a huge amount of files in a Linux environment and I was trying to filter my data. Here's what my data looks like
The first part of the filename (anything before the first dot is similar in many of them).
I would like to keep the files with unique names. In case the first part of the name (before the first dot) is similar, look for the largest file size and keep it. My resulting data should look something like this:
I think `awk` can do it but I am not sure how to handle duplicates with `awk`
I hope this is not very complicated
Many thanks,
Last edited by jim mcnamara; 07-08-2013 at 07:07 AM..
i have a file with some 1000 entries it will contain entries like
1000,ram
2000,pankaj
1001,rahim
1000,ram
2532,govind
2000,pankaj
3000,venkat
2532,govind
what i want is i want to extract only the distinct rows from this file
so my output should contain only
1000,ram... (2 Replies)
I have data like this:
It's sorted by the 2nd field (TID).
envoy,90000000000000634600010001,04/11/2008,23:19:27,RB00266,0015,DETAIL,ERROR,
envoy,90000000000000634600010001,04/12/2008,04:23:45,RB00266,0015,DETAIL,ERROR,... (1 Reply)
hey all,
I need some help.
I have a text file with names in it.
My target is that if a particular pattern exists in that file more than once..then i want to rename all the occurences of that pattern by alternate patterns..
for e.g if i have PATTERN occuring 5 times then i want to... (3 Replies)
I have a log file with posts looking like this:
--
Messages can be delivered by different systems at different times. The id number is used to sort out duplicate messages. What I need is to strip the arrival time from each post, sort posts by id number, and reattach arrival time to respective... (2 Replies)
Hi Experts,
Please check the following new requirement. I got data like the following in a file.
FILE_HEADER
01cbbfde7898410| 3477945| home| 1
01cbc275d2c122| 3478234| WORK| 1
01cbbe4362743da| 3496386| Rich Spare| 1
01cbc275d2c122| 3478234| WORK| 1
This is pipe separated file with... (3 Replies)
Hi,
I have a file that I want to change the format of. It is a large file in rows but I want it to be comma separated (comma then a space).
The current file looks like this:
HI, Joe, Bob, Jack, Jack
After I would want to remove any duplicates so it would look like this:
HI, Joe,... (2 Replies)
Hi All,
I am merging files coming from 2 different systems ,while doing that I am getting duplicates entries in the merged file
I,01,000131,764,2,4.00
I,01,000131,765,2,4.00
I,01,000131,772,2,4.00
I,01,000131,773,2,4.00
I,01,000168,762,2,2.00
I,01,000168,763,2,2.00... (5 Replies)
I have been using grep to output whole lines using a pattern file with identifiers (fileA):
fig|562.2322.peg.1
fig|562.2322.peg.3
fig|562.2322.peg.3
fig|562.2322.peg.3
fig|562.2322.peg.7
From fileB with corresponding identifiers in the second column:
NODE_0 fig|562.2322.peg.1 peg ... (2 Replies)
i hav two files like
i want to remove/delete all the duplicate lines in file2 which are viz unix,unix2,unix3.I have tried previous post also,but in that complete line must be similar.In this case i have to verify first column only regardless what is the content in succeeding columns. (3 Replies)
Discussion started by: sagar_1986
3 Replies
LEARN ABOUT ULTRIX
pclose
popen(3) Library Functions Manual popen(3)Name
popen, pclose - initiate I/O to/from a process
Syntax
#include <stdio.h>
FILE *popen(command, type)
char *command, *type;
pclose(stream)
FILE *stream;
Description
The arguments to are pointers to null-terminated strings containing respectively a shell command line and an I/O mode, either "r" for read-
ing or "w" for writing. It creates a pipe between the calling process and the command to be executed. The value returned is a stream
pointer that can be used (as appropriate) to write to the standard input of the command or read from its standard output.
A stream opened by should be closed by which waits for the associated process to terminate and returns the exit status of the command.
Because open files are shared, a type "r" command may be used as an input filter, and a type "w" as an output filter.
Diagnostics
The routine returns a null pointer if files or processes cannot be created, or the shell cannot be accessed.
The routine returns -1 if stream is not associated with a `popened' command.
Restrictions
Buffered reading before opening an input filter may leave the standard input of that filter mispositioned. Similar problems with an output
filter may be forestalled by careful buffer flushing, for instance, with For further information, see
The routine always calls and never calls
See Alsosh(1), pipe(2), wait(2), system(3), fclose(3s), fopen(3s)popen(3)