Piping commands using xargs Post: 303008245

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Executing commands with xargs

I have a SQL script that requires values from the environment in order to execute. I found a way to get the desired results but my process is a little choppy. Any suggestions on how to clean this up would be greatly appreciated. SQL Script ------------- select a, b, c from d where a =...

2. 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...

3. UNIX for Dummies Questions & Answers

use of xargs and prune piping with find command.

Can anyone interpret and tell me the way the below command works? find * -name "*${msgType}" -mtime +${archiveDays} -prune -type f -print 2>/dev/null | xargs rm -f 2> /dev/null Please tell me the usage of prune and xargs in the above command? Looking forward your reply. Thanks in...

4. Shell Programming and Scripting

Piping through commands read as variables from file

This is going to be part of a longer script with more features, but I have boiled it down to the one thing that is presently stumping me. The goal is a script which checks for updates to web pages that can be run as a cron job. The script reads (from a tab-delim file) a URL, an MD5 digest, and an...

5. Solaris

Piping results of 'ls' to 'find' using 'xargs'

I'm trying to get a count of all the files in a series of directories on a per directory basis. Directory structure is like (but with many more files): /dir1/subdir1/file1.txt /dir1/subdir1/file2.txt /dir1/subdir2/file1.txt /dir1/subdir2/file2.txt /dir2/subdir1/file1.txt...

6. Shell Programming and Scripting

piping problem with xargs

I'm trying to pipe the output from a command into another using xargs but is not getting what I want. Running this commands: find . -name '33_cr*.rod' | xargs -n1 -t -i cut -f5 {} | sort -k1.3n | uniq | wc -l give the following output: cut -f5 ./33_cr22.rod cut -f5 ./33_cr22.rod ... 9224236...

7. UNIX for Dummies Questions & Answers

Piping multiple commands

Using the below code I want to find all .sff files and extract them. This works but it seems very cheap. Is there a safer more efficient way to go about this? #!/bin/bash G1=(/home/dirone) find ${G1} -type f -name \*.sff | xargs python /usr/local/bin/sff_extract.py

8. UNIX for Dummies Questions & Answers

Piping commands

Hi I am tryin to undertand piping command1|command2 from what i learn output of cammand 2 is an intput for command 1 right? If so . What dose next sequence do cat f1 >> f2 | grep '^' I think it takes context of f1 and Concatenate's it to f2 and then looks for ....i don't know.....

9. 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...

10. Shell Programming and Scripting

Proper chaining and piping of commands

can someone please help me fix the below one liner? what i want to do is run a command, and if that command is successful, pipe the output of the command to another command. i'd prefer not to use any temp files for this. who -blahblah ; if ; then echo exit; fi | egrep username

LEARN ABOUT DEBIAN

bf_tar

BF_TAR(1)						    Bogofilter Reference Manual 						 BF_TAR(1)

NAME

       bf_tar - shell script to write a tar file of a bogofilter directory to stdout

SYNOPSIS

       bf_tar [-r] [-R] bogofilter_directory

DESCRIPTION

       bf_tar bundles a bogofilter working directory in tar format and copies it to standard output (your console, or where you redirect it, see
       EXAMPLES below).

OPTIONS

       The -r option causes bf_tar to remove inactive log files after the archive has been written successfully. The default is to leave log
       files.

       The -R option causes bf_tar to remove inactive log files before the archive is written. This may reduce chances that the resulting archive
       is recoverable should it become damaged. The archive may be smaller though. The default is to leave log files.

EXIT STATUS

       The script exits with status code 0 if everything went well, and nonzero if it encountered trouble.

EXAMPLES

       o   bf_tar ~/.bogofilter > outfile.tar

	   Writes a standard .tar file containing the essential files from ~/.bogofilter to outfile.tar.

       o   bf_tar ~/.bogofilter | gzip -9 -c > outfile.tar.gz

	   Writes a gzipped .tar.gz file containing the essential files from ~/.bogofilter to outfile.tar.gz.

       o   bf_tar `pwd`/mydirectory > outfile.tar

	   Prepend $(pwd)/ or `pwd`/ if you want to specify an absolute path instead of a relative path.

NOTES

       This script is meant for use with Berkeley DB based bogofilter versions.

       This script requires a SUSv2 compliant pax utility.

       This script expects a SUSv2 compliant shell. Solaris systems should have the SUNWxcu4 package installed (when bogofilter is configured) so
       that /usr/xpg4/bin/sh can be used.

AUTHORS

       Matthias Andree

Bogofilter							    03/15/2010								 BF_TAR(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Executing commands with xargs

Discussion started by: bmopal

2. Shell Programming and Scripting

Can Xargs execute multiple commands of evry input file

Discussion started by: nilesrex

3. UNIX for Dummies Questions & Answers

use of xargs and prune piping with find command.

Discussion started by: venkatesht

4. Shell Programming and Scripting

Piping through commands read as variables from file

Discussion started by: fitzwilliam