Sponsored Content
Top Forums Shell Programming and Scripting awk changes to make it faster Post 302808149 by mirwasim on Thursday 16th of May 2013 02:54:39 AM
Old 05-16-2013
awk changes to make it faster

I have script like below, who is picking number from one file and and searching in another file, and printing output.

Bu is is very slow to be run on huge file.can we modify it with awk

Code:
#! /bin/ksh
while read line1
do
echo "$line1"
a=`echo $line1`
if [ $a -ge 0 ]
then
echo "$num"
cat file1|nawk -v "c=$line1" '$1 ~ c' >> message.log
fi
done < file2

.

file2 has below data
Code:
cat file2
1234
5678
9100
1324

file 1 has string which contain this data in that.
 

10 More Discussions You Might Find Interesting

1. Solaris

looking for different debugger for Solaris or to make sunstudio faster

im using the sunstudio but it is very slow , is there ant other GUI debugger for sun Solaris or at list some ways to make it faster ? im using to debug throw telnet connection connected to remote server thanks (0 Replies)
Discussion started by: umen
0 Replies

2. Shell Programming and Scripting

Can anyone make this script run faster?

One of our servers runs Solaris 8 and does not have "ls -lh" as a valid command. I wrote the following script to make the ls output easier to read and emulate "ls -lh" functionality. The script works, but it is slow when executed on a directory that contains a large number of files. Can anyone make... (10 Replies)
Discussion started by: shew01
10 Replies

3. Shell Programming and Scripting

awk help to make my work faster

hii everyone , i have a file in which i have line numbers.. file name is file1.txt aa bb cc "12" qw xx yy zz "23" we bb qw we "123249" jh here 12,23,123249. is the line number now according to this line numbers we have to print lines from other file named... (11 Replies)
Discussion started by: kumar_amit
11 Replies

4. Red Hat

Re:How to make the linux pc faster

Hi, Can any one help me out in solving the problem i have a linux database server it is tooo slow that i am unable to open even the terminial is there any solution to get rid of this problem.How to make this server faster. Thanks & Regards Venky (0 Replies)
Discussion started by: venky_vemuri
0 Replies

5. Shell Programming and Scripting

How to make copy work faster

I am trying to copy a folder which contains a list of C executables. It takes 2 mins for completion,where as the entire script takes only 3 more minutes for other process. Is there a way to copy the folder faster so that the performance of the script will improve? (2 Replies)
Discussion started by: prasperl
2 Replies

6. Shell Programming and Scripting

Running rename command on large files and make it faster

Hi All, I have some 80,000 files in a directory which I need to rename. Below is the command which I am currently running and it seems, it is taking fore ever to run this command. This command seems too slow. Is there any way to speed up the command. I have have GNU Parallel installed on my... (6 Replies)
Discussion started by: shoaibjameel123
6 Replies

7. Shell Programming and Scripting

Make script faster

Hi all, In bash scripting, I use to read files: cat $file | while read line; do ... doneHowever, it's a very slow way to read file line by line. E.g. In a file that has 3 columns, and less than 400 rows, like this: I run next script: cat $line | while read line; do ## Reads each... (10 Replies)
Discussion started by: AlbertGM
10 Replies

8. Shell Programming and Scripting

How to make awk command faster?

I have the below command which is referring a large file and it is taking 3 hours to run. Can something be done to make this command faster. awk -F ',' '{OFS=","}{ if ($13 == "9999") print $1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12 }' ${NLAP_TEMP}/hist1.out|sort -T ${NLAP_TEMP} |uniq>... (13 Replies)
Discussion started by: Peu Mukherjee
13 Replies

9. Shell Programming and Scripting

How to make awk command faster for large amount of data?

I have nginx web server logs with all requests that were made and I'm filtering them by date and time. Each line has the following structure: 127.0.0.1 - xyz.com GET 123.ts HTTP/1.1 (200) 0.000 s 3182 CoreMedia/1.0.0.15F79 (iPhone; U; CPU OS 11_4 like Mac OS X; pt_br) These text files are... (21 Replies)
Discussion started by: brenoasrm
21 Replies

10. Shell Programming and Scripting

How to make faster loop in multiple directories?

Hello, I am under Ubuntu 18.04 Bionic. I have one shell script run.sh (which is out of my topic) to run files under multiple directories and one file to control all processes running under those directories (control.sh). I set a cronjob task to check each of them with two minutes of intervals.... (3 Replies)
Discussion started by: baris35
3 Replies
cat(1)							      General Commands Manual							    cat(1)

Name
       cat - concatenate and print data

Syntax
       cat [ -b ] [ -e ] [ -n ] [ -s ] [ -t ] [ -u ] [ -v ] file...

Description
       The  command reads each file in sequence and displays it on the standard output.  Therefore, to display the file on the standard output you
       type:
       cat file
       To concatenate two files and place the result on the third you type:
       cat file1 file2 > file3
       To concatenate two files and append them to a third you type:
       cat file1 file2 >> file3
       If no input file is given, or if a minus sign (-) is encountered as an argument, reads from the standard input file.  Output is buffered in
       1024-byte blocks unless the standard output is a terminal, in which case it is line buffered.  The utility supports the processing of 8-bit
       characters.

Options
       -b   Ignores blank lines and precedes each output line with its line number.

       -e   Displays a dollar sign ($) at the end of each output line.

       -n   Precedes all output lines (including blank lines) with line numbers.

       -s   Squeezes adjacent blank lines from output and single spaces output.

       -t   Displays non-printing characters (including tabs) in output.  In addition to those representations used with the -v  option,  all  tab
	    characters are displayed as ^I.

       -u   Unbuffers output.

       -v   Displays  non-printing  characters (excluding tabs and newline) as the ^x.	If the character is in the range octal 0177 to octal 0241,
	    it is displayed as M-x. The delete character (octal 0177) displays as ^?.  For example, is displayed as ^X.

See Also
       cp(1), ex(1), more(1), pr(1), tail(1)

																	    cat(1)
All times are GMT -4. The time now is 05:54 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy