Sponsored Content
Top Forums Shell Programming and Scripting Extract large list of substrings Post 302233805 by dcfargo on Monday 8th of September 2008 01:14:16 PM
Old 09-08-2008
Extract large list of substrings

I have a very long string (millions of characters).

I have a file with start location and length that is thousands of rows long:

Start Length
5 10
16 21
44 100
215 37
...

I'd like to extract the substring that corresponds to the start and length from each row of the list:

I tried just using a large awk '{print substr($1,5,10), "\n", substr($1,16,21) "\n", substr($1,44,100) "\n", substr($1,215,37)...}' infile > outfile &

command

But it seems to hang likely because the Bash line is too long.

Can you help me with a way to get out the substrings as rows.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

List large files

Hi I need to list all files in the system: 1. Greater than specific size 2. All files sorted by size How can I do that? Thanks in advance. (2 Replies)
Discussion started by: GNMIKE
2 Replies

2. Shell Programming and Scripting

Need to extract 7 characters immediately after text '19' from a large file.

Hi All!! I have a large file containing millions of record. My purpose is to extract 7 characters immediately after text '19' from this file (including text '19') and save the result in new file. So, my OUTPUT would be as under : 191234561 194567894 192789005 198839408 and so on..... ... (7 Replies)
Discussion started by: parshant_bvcoe
7 Replies

3. Shell Programming and Scripting

Extract data from large file 80+ million records

Hello, I have got one file with more than 120+ million records(35 GB in size). I have to extract some relevant data from file based on some parameter and generate other output file. What will be the besat and fastest way to extract the ne file. sample file format :--... (2 Replies)
Discussion started by: learner16s
2 Replies

4. Shell Programming and Scripting

extract unique pattern from large text file

Hi All, I am trying to extract data from a large text file , I want to extract lines which contains a five digit number followed by a hyphen , like 12345- , i tried with egrep ,eg : egrep "+" text.txt but which returns all the lines which contains any number of digits followed by hyhen ,... (19 Replies)
Discussion started by: shijujoe
19 Replies

5. Shell Programming and Scripting

Extract information into large variable

Hello people :) That's here my first message to your forum, so I guess it would be fine ^^ I have a request about a code I want to use. Actually, my system use a large variable, including much informations but those informations can change by more and I want to extract one of thoses... (26 Replies)
Discussion started by: WolwX
26 Replies

6. Shell Programming and Scripting

Extract three substrings from a logfile

I have a log file like below. 66.249.73.11 - - "UCiZ7QocVqYAABgwfP8AAHAA" "US" "Mediapartners-Google" "-" www.mahashwetha.com.sg "GET... (2 Replies)
Discussion started by: Tuxidow
2 Replies

7. Shell Programming and Scripting

Curl download zip extract large xml file

Hi i have a php script that works 100% however i don't want this to run on php because of server limits etc. Ideally if i could convert this simple php script to a shell script i can set it up to run on a cron. My mac server has curl on it. So i am assuming i should be using this to download the... (3 Replies)
Discussion started by: timgolding
3 Replies

8. UNIX for Dummies Questions & Answers

Extract spread columns from large file

Dear all, I want to extract around 300 columns from a very large file with almost 2million columns. There are no headers, but I can find out which column numbers I want. I know I can extract with the function 'cut -f2' for example just the second column but how do I do this for such a large... (1 Reply)
Discussion started by: fndijk
1 Replies

9. Shell Programming and Scripting

Need to extract 8 characters from a large file.

Hi All!! I have a large file containing millions of records. My purpose is to extract 8 characters immediately from the given file. 222222222|ZRF|2008.pdf|2008|01/29/2009|001|B|C|C 222222222|ZRF|2009.pdf|2009|01/29/2010|001|B|C|C 222222222|ZRF|2010.pdf|2010|01/29/2011|001|B|C|C... (5 Replies)
Discussion started by: pavand
5 Replies

10. UNIX for Beginners Questions & Answers

Command to extract empty field in a large UNIX file?

Hi All, I have records in unix file like below. In this file, we have empty fields from 4th Column to 22nd Column. I have some 200000 records in a file. I want to extract records only which have empty fields from 4th field to 22nd filed. This file is comma separated file. what is the unix... (2 Replies)
Discussion started by: rakeshp
2 Replies
mailq(1)						      General Commands Manual							  mailq(1)

NAME
mailq - prints the mail queue SYNOPSIS
DESCRIPTION
prints a summary of the mail messages queued for future delivery. The first line printed for each message shows the internal identifier used on this host for the message, the size of the message in bytes, the date and time the message was accepted into the queue, and the envelope sender of the message. The second line shows the error message that caused this message to be retained in the queue; it will not be present if the message is being processed for the first time. The status characters are: to indicate that the job is being processed to indicate that the load is too high to process the job to indicate that the job is too new in the queue to process. The output lines that follow the second line show the message recipients, one per line. is identical to Options The supported options are: Show the mail submission queue specified in the file instead of the MTA queue specified in the file. Show the lost items in the mail queue instead of normal queue items. Show the quarantined items in the mail queue instead of the normal queue items. Limit processed jobs to those containing substr as a substring of the queue ID or not when is specified. Limit processed jobs to quarantined jobs containing substr as a substring of the quarantine reason or not when is specified. Limit processed jobs to those containing substr as a substring of one of the recipients or not when is specified. Limit processed jobs to those containing substr as a substring of the sender or not when is specified. Print verbose information. This adds the priority of the message and a single character indicator or blank) indicating whether a warning message has been sent on the first line of the message. In addition, extra lines may be intermixed with the recipients indicating the `controlling user' information. This shows who owns the programs that are executed on behalf of this message and the name of the alias this command expanded from, if any. RETURN VALUE
The utility exits with 0 on success, and >0 if an error occurs. AUTHOR
was developed by the University of California, Berkeley, and originally appeared in 4.0BSD. FILES
mail queue files for SEE ALSO
sendmail(1M). mailq(1)
All times are GMT -4. The time now is 05:40 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy