Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Using xargs for multiple functions
Top Forums Shell Programming and Scripting Using xargs for multiple functions Post 302436170 by panyam on Friday 9th of July 2010 11:19:53 AM
Old 07-09-2010
Code:
 
for i in `cat syslogs | nawk '/From/ {print $3}' | uniq`; do grep $i syslogs >> $i

Just an advice : no need of "cat" here, something like this should be fine:

Code:
 
for i in `nawk '/From/ {print $3}' syslogs | uniq`; do grep $i syslogs >> $i

This User Gave Thanks to panyam For This Post:
krypton
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Can Xargs execute multiple commands of evry input file

Hello , I am trying to print the footer of evry file in the given directory with xargs command like follows ls -1 | xargs -I {} gzcat {} | tail -1 now problem with this is only last file foooter is getting printed as " | tail -1 " is getting executed for the last file. I know this can... (4 Replies)
Discussion started by: nilesrex
4 Replies

2. Shell Programming and Scripting

Multiple functions

Hi, which of the shell support multiple functions in a shell script? Thanks Amit (1 Reply)
Discussion started by: amitrajvarma
1 Replies

3. Shell Programming and Scripting

Run Multiple Functions over SSH (BASH)

I am trying to write a script that will ssh into a remote machine and recurse through a specified directory, find mp3 files which may be two or three directories deep (think iTunes: music/artist/album/song.mp3), and scp them back to the machine running the script. The script should also maintain... (3 Replies)
Discussion started by: johnnybg00de
3 Replies

4. Shell Programming and Scripting

Calling multiple functions in parallel

Hello, I have multiple functions within a shell script. eg. function_database_backup, unix_tar_creation, etc. I would like to run these functions in parallel, as each is independent of the other. If these were simple commands, I could have probably run each of the commands in background. ... (1 Reply)
Discussion started by: neil.k
1 Replies

5. Shell Programming and Scripting

How to run multiple functions in Background in UNIX Shell Scripting?

Hi, I am using ksh , i have requirement to run 4 functions in background , 4 functions call are available in a case that case is also in function, i need to execute 1st function it should run in background and return to case and next i will call 2nd function it should run in background and... (8 Replies)
Discussion started by: karthikram
8 Replies

6. Shell Programming and Scripting

Xargs: multiple commands to each argument

Hello. There is my one-liner to get subjects of potential spam mails sudo exiqgrep -bf "spamer@example.com" |cut -d' ' -f1 |xargs -I ~ sudo /usr/sbin/exim -Mvh ~ |grep 'Subject: ' I want to insert blank line after each iteration to make output more readable. I tried sudo exiqgrep -bf... (1 Reply)
Discussion started by: urello
1 Replies

7. Shell Programming and Scripting

Parallel processing for functions in xargs

I have a script (ksh) which tries to run a function in parallel for performance gains. I am also trying to limit the number of parallel child processes to avoid overloading the system by using a variable to count triggered processes and waiting for completion e.g. do_something () { ... } ... (9 Replies)
Discussion started by: jawsnnn
9 Replies

8. Shell Programming and Scripting

Python passing multiple parameters to functions

Hi, I am a beginner in python programming. In my python script have a main function which calls several other functions. The main function gets its input by reading lines from a input text file. I call the main function for every line in input text file through a loop. def main(line): var1... (6 Replies)
Discussion started by: ctrld
6 Replies

9. Shell Programming and Scripting

Shell script to apply functions to multiple columns dynamically

Hello, I have a requirement to apply hashing algorithm on flat file on one or more columns dynamically based on header sample input file ID|NAME|AGE|GENDER 10|ABC|30|M 20|DEF|20|F say if i want multiple columns based on the header example id,name or id,age or name,gender and hash and... (13 Replies)
Discussion started by: mkathi
13 Replies

10. Shell Programming and Scripting

Xargs to call python executable to process multiple bam files

I am running the below loop that to process the 3 bam files (which isn't always the case). A .py executable is then called using | xargs sh to further process. If I just run it with echo the output is fine and expected, however when | xargs sh is added I get the error. I tried adding | xargs... (4 Replies)
Discussion started by: cmccabe
4 Replies

LEARN ABOUT LINUX

zegrep

ZGREP(1)                                                      General Commands Manual                                                     ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep  options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

                                                                                                                                          ZGREP(1)
All times are GMT -4. The time now is 11:03 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy