insert a header in a huge data file without using an intermediate file Post: 302286257

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Insert a line as the first line into a very huge file

Hello, I need to insert a line (like a header) as the first line of a very huge file (about 3 ml rows). I am able to do it with sed, but redirecting the output and creating a new file takes quite some time. I was wondering if there was a more efficient way of doing it? Any help would be...

2. UNIX for Dummies Questions & Answers

search and grab data from a huge file

folks, In my working directory, there a multiple large files which only contain one line in the file. The line is too long to use "grep", so any help? For example, if I want to find if these files contain a string like "93849", what command I should use? Also, there is oder_id number...

3. Shell Programming and Scripting

How to extract data from a huge file?

Hi, I have a huge file of bibliographic records in some standard format.I need a script to do some repeatable task as follows: 1. Needs to create folders as the strings starts with "item_*" from the input file 2. Create a file "contents" in each folders having "license.txt(tab...

4. Programming

to find header in Mp3 file and retrieve data

hi all, In an mp3 file , data is arranged in sequence of header and data ,how to retrieve data between two headers. Is the data between two headers fixed? because as per theory it says 1152 samples will be there , but dont knw how many bits one sample correspond to? it would help if any c...

5. Shell Programming and Scripting

Three Difference File Huge Data Comparison Problem.

I got three different file: Part of File 1 ARTPHDFGAA . . Part of File 2 ARTGHHYESA . . Part of File 3 ARTPOLYWEA . .

6. Shell Programming and Scripting

Help- counting delimiter in a huge file and split data into 2 files

I’m new to Linux script and not sure how to filter out bad records from huge flat files (over 1.3GB each). The delimiter is a semi colon “;” Here is the sample of 5 lines in the file: Name1;phone1;address1;city1;state1;zipcode1 Name2;phone2;address2;city2;state2;zipcode2;comment...

7. Shell Programming and Scripting

Extract header data from one file and combine it with data from another file

Hi, Great minds, I have some files, in fact header files, of CTD profiler, I tried a lot C programming, could not get output as I was expected, because my programming skills are very poor, finally, joined unix forum with the hope that, I may get what I want, from you people, Here I have attached...

8. Shell Programming and Scripting

Insert date/time header at top of file

I'm trying to take mrt output and put it at the top of a file along with the date and time. I was able to do it at the bottom of the file with the following printf "********** $(date) **********\n\n" >> $OUTPUT_PATH/$HOSTNAME mtr -r -w -c 10 $HOSTADDRESS >> $OUTPUT_PATH/$HOSTNAME printf...

9. UNIX for Advanced & Expert Users

Need Optimization shell/awk script to aggreagte (sum) for all the columns of Huge data file

Optimization shell/awk script to aggregate (sum) for all the columns of Huge data file File delimiter "|" Need to have Sum of all columns, with column number : aggregation (summation) for each column File not having the header Like below - Column 1 "Total Column 2 : "Total ... ......

10. UNIX for Advanced & Expert Users

File comaprsons for the Huge data files ( around 60G) - Need optimized and teh best way to do this

I have 2 large file (.dat) around 70 g, 12 columns but the data not sorted in both the files.. need your inputs in giving the best optimized method/command to achieve this and redirect the not macthing lines to the thrid file ( diff.dat) File 1 - 15 columns File 2 - 15 columns Data is...

LEARN ABOUT PHP

getrusage

GETRUSAGE(3)								 1							      GETRUSAGE(3)

getrusage - Gets the current resource usages

SYNOPSIS

       array getrusage ([int  $who])

DESCRIPTION

	This is an interface to getrusage(2). It gets data returned from the system call.

PARAMETERS

	      o $who
		- If $who is 1, getrusage will be called with RUSAGE_CHILDREN.

RETURN VALUES

	Returns an associative array containing the data returned from the system call. All entries are accessible by using their documented field
       names.

EXAMPLES

       Example #1

	      getrusage(3) example

	      <?php
	      $dat = getrusage();
	      echo $dat["ru_nswap"];	     // number of swaps
	      echo $dat["ru_majflt"];	     // number of page faults
	      echo $dat["ru_utime.tv_sec"];  // user time used (seconds)
	      echo $dat["ru_utime.tv_usec"]; // user time used (microseconds)
	      ?>

CHANGELOG

       +--------+---------------------------------------------+
       |Version |					      |
       |	|					      |
       |	|		  Description		      |
       |	|					      |
       +--------+---------------------------------------------+
       | 7.0.0	|					      |
       |	|					      |
       |	|  This function is now supported on Windows. |
       |	|					      |
       +--------+---------------------------------------------+
NOTES

       Note

	       On Windows getrusage(3) will only return the following members:

		     o "ru_stime.tv_sec"

		     o "ru_stime.tv_usec"

		     o "ru_utime.tv_sec"

		     o "ru_utime.tv_usec"

		     o "ru_majflt" (only if $who is RUSAGE_SELF)

		     o "ru_maxrss" (only if $who is RUSAGE_SELF)

	       If getrusage(3) is called with $who set to 1 ( RUSAGE_CHILDREN), then resource usage for threads are collected (meaning that inter-
	      nally the function is called with RUSAGE_THREAD).

       Note

	       on BeOS 2000, only the following members are returned:

		     o "ru_stime.tv_sec"

		     o "ru_stime.tv_usec"

		     o "ru_utime.tv_sec"

		     o "ru_utime.tv_usec"

SEE ALSO

       Your system's man page on getrusage(2).

PHP Documentation Group 													      GETRUSAGE(3)