Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Search multiple patterns in multiple files
Top Forums Shell Programming and Scripting Search multiple patterns in multiple files Post 302490046 by methyl on Sunday 23rd of January 2011 05:10:42 PM
Old 01-23-2011
What Operating System and version are you running? This is very important. I haven't seen the "fork" error in many years.
We gather that you have ksh.

Quote:
#!/usr/bin/ksh
for num in `cat file1.txt`
do
find . -name "*processed" -print | xargs gunzip -c | grep -q $num || echo "$num not found" >> outputfile.txt &
done
The script posted makes no sense because it does not search for zipped files.


If "file1.txt" contains 5,000,000 numbers this level of blunt processing is absurd in unix Shell when searching 5Gb of data.
You appear to want to search a specific field at a specific position within a record but have provided sample data in "file1.txt" which does not match the exact length of the highlighted field.


Do you have use of a professional Systems Analyst?
Do you have a database engine (e.g. Oracle) and use of professional Database Programmers?

IMHO you are way out of you depth. Hire a professional.



The background "&" within a 5,000,000 iteration loop is why you are getting "fork" errors. It would take a seriously special kernel build to create a unix which could cope with 5,000,000 concurrent processes (hmm. temptied to try it). I am surprised that you did not crash the computer with this irresponsible, uninformed and ignorant code.


Ps: Given a decent commercial database engine and some top-class Database Programmers this problem is solveable.
Last edited by methyl; 01-23-2011 at 06:46 PM.. Reason: Footnote:, layout and more layout
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to parameterize multiple search patterns and generate a new file

I have one file: 123*100*abcd*10 123*101*abcd*-29*def 123*100*abcd*-10 123*102*abcd*-105*asd I would like to parameterize the search patterns in the following way so that the user could dynamically change the search pattern. *100* and *- (ie *minus) *102* and *- The output that is... (6 Replies)
Discussion started by: augustinep
6 Replies

2. Shell Programming and Scripting

Perl: Match a line with multiple search patterns

Hi I'm not very good with the serach patterns and I'd need a sample how to find a line that has multiple patterns. Say I want to find a line that has "abd", "123" and "QWERTY" and there can be any characters or numbers between the serach patterns, I have a file that has thousands of lines and... (10 Replies)
Discussion started by: Juha
10 Replies

3. Shell Programming and Scripting

Perl - How to search a text file with multiple patterns?

Good day, great gurus, I'm new to Perl, and programming in general. I'm trying to retrieve a column of data from my text file which spans a non-specific number of lines. So I did a regexp that will pick out the columns. However,my pattern would vary. I tried using a foreach loop unsuccessfully.... (2 Replies)
Discussion started by: Sp3ck
2 Replies

4. Shell Programming and Scripting

search multiple patterns

I have two lists in a file that look like a b b a e f c d f e d c I would like a final list a b c d e f I've tried multiple grep and awk but can't get it to work (8 Replies)
Discussion started by: godzilla07
8 Replies

5. Shell Programming and Scripting

How to search Multiple patterns in unix

Hi, I tried to search multiple pattern using awk trans=1234 reason=LN MISMATCH rec=`awk '/$trans/ && /'"$reason"'/' file` whenevr i tried to run on command promt it is executing but when i tried to implment same logic in shell script,it is failing i.e $rec is empty ... (6 Replies)
Discussion started by: ns64110
6 Replies

6. Shell Programming and Scripting

Search & Replace: Multiple Strings / Multiple Files

I have a list of files all over a file system e.g. /home/1/foo/bar.x /www/sites/moose/foo.txtI'm looking for strings in these files and want to replace each occurrence with a replacement string, e.g. if I find: '#@!^\&@ in any of the files I want to replace it with: 655#@11, etc. There... (2 Replies)
Discussion started by: spacegoose
2 Replies

7. Shell Programming and Scripting

Grep from multiple patterns multiple file multiple output

Hi, I want to grep multiple patterns from multiple files and save to multiple outputs. As of now its outputting all to the same file when I use this command. Input : 108 files to check for 390 patterns to check for. output I need to 108 files with the searched patterns. Xargs -I {} grep... (3 Replies)
Discussion started by: Diya123
3 Replies

8. Shell Programming and Scripting

Search patterns in multiple logs parallelly.

Hi All, I am starting a service which will redirect its out put into 2 logs say A and B. Now for succesful startup of the service i need to search pattern1 in log A and pattern2 in log B which are writen continuosly. Now my requirement is to find the patterns in the increasing logs A and B... (19 Replies)
Discussion started by: Girish19
19 Replies

9. Shell Programming and Scripting

Search Multiple patterns and display

Hi, I have scenario like below and need to search for multiple patterns Eg: Test Time Started= secs Time Ended = secc Green test Test Time Started= secs Time Ended = secc Green test Output: I need to display the text starting with Test and starting with Time... (2 Replies)
Discussion started by: weknowd
2 Replies

10. UNIX for Beginners Questions & Answers

Issue with search and replacing multiple items in multiple files

Im having an issue when trying to replace the first column with a new set of values in multiple files. The results from the following code only replaces the files with the last set of values in val.txt. I want to replace all the files with all the values. for date in {1..31} do for val in... (1 Reply)
Discussion started by: ncwxpanther
1 Replies

LEARN ABOUT OSF1

temporary

Temporary(4)						     Kernel Interfaces Manual						      Temporary(4)

NAME

       Temporary - Stores data files during transfers to remote systems

SYNOPSIS

       /usr/spool/uucp/SystemName/TM.xxPID.000

DESCRIPTION

       The  uucp  Temporary  (TM.*) files store data files during transfers to remote systems.	After a Data (D.*) file is transferred to a remote
       system by the uucico daemon, the uucp program places it in a subdirectory of the uucp spooling directory named  /usr/spool/uucp/SystemName,
       where  the SystemName directory is named for the computer that is transmitting the file.  The uucp program creates a temporary data file to
       hold the original data file.

       The full pathname of the temporary data file is in the following format: /usr/spool/uucp/SystemName/TM.xxPID.000

       where the SystemName directory is named for the computer that is sending the file, and TM.xxPID.000 is the name of the file;  for  example,
       TM.00451.000.  The PID variable is the process ID of the job.

FILES

       Describes accessible remote systems Contains uucp command, data, and execute files Contain data to be transferred.  Contain files that uucp
       has transferred

RELATED INFORMATION

       Daemons: uucico(8)

       Commands: uucp(1), uudemon.cleanu(4), uupick(1), uuto(1), uux(1) delim off

																      Temporary(4)
All times are GMT -4. The time now is 08:41 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy