insert a header in a huge data file without using an intermediate file Post: 302286317

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 DEBIAN

fixnt

fixnt(1)							      Debian								  fixnt(1)

NAME

       fixnt - Filter for the Windows NT postscript printer driver.

SYNOPSIS

       fixnt < BADFILE.ps > GOODFILE.ps

DESCRIPTION

       The  Windows  NT  postscript  driver has a tendency to make broken postscript files, that are incompatible with psutils.  fixnt is a filter
       that fixes these problems, allowing the use of psnup(1).

       The filter takes the broken postscript file on stdin, and outputs a fixed postscript file on stdout.  It has no other form  for	invocation
       and takes no options on the command-line.

OPTIONS

       fixnt  takes no options.

BUGS

       fixnt does not check for NTPSOct94.  For a workaround, use a sed(1) command to replace 'NTPSOct94' with 'NTPSOct95', like so:
	      sed 's/NTPSOct94/NTPSOct95/g'
       This is particularly important for Windows NT 3.5 users.

AUTHOR

       fixnt   was   written   by   Holger   Bauer   <Holger.Bauer@topmail.de>,  Michael  Rath	<rath@itsm.uni-stuttgart.de>,  and  Akim  Demaille
       <demaille@inf.enst.fr>.

REPORTING BUGS

       Report bugs to the Authors, but avoid sending large postscript files.

       Patches are always welcome; send to <bauer@itsm.uni-stuttgart.de>.

SEE ALSO

       psnup(1), sed(1)

a2ps								   February 2003							  fixnt(1)