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Top Forums UNIX for Beginners Questions & Answers Wget, grep, sort, sed in 1 command/script Post 302996136 by Don Cragun on Wednesday 19th of April 2017 03:29:51 PM
Old 04-19-2017
What operating system are you using?

What shell are you using?

If the commands:
Code:
grep -hrio "\b[a-z0-9.-]\+@[a-z0-9.-]\+\.[a-z]\{2,4\}\+\b" * > first.txt
sort -u first.txt > second.txt && sed '0~5 a\\' second.txt > third.txt

produce the output you want in third.txt after running the command:
Code:
wget -q -r -l1 URL

what is the difference between third.txt and fourth.txt after you also run:
Code:
grep -hrio "\b[a-z0-9.-]\+@[a-z0-9.-]\+\.[a-z]\{2,4\}\+\b" * |
    sort -u |
    sed '0~5 a\\' > fourth.txt

? Are any diagnostic messages produced by either of these sets of commands? If so, exactly what are those diagnostic messages?
 

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PARALLEL-SLURP(1)														 PARALLEL-SLURP(1)

NAME
parallel-slurp - copy files from listed hosts SYNOPSIS
parallel-slurp [OPTIONS] -h hosts.txt -L destdir remote local DESCRIPTION
pssh provides a number of commands for executing against a group of computers, using SSH. It's most useful for operating on clusters of homogenously-configured hosts. parallel-slurp gathers specified files from hosts you listed. OPTIONS
-r --recursive recusively copy directories (OPTIONAL) -L --localdir output directory for remote file copies -h --hosts hosts file (each line "host[:port] [user]") -l --user username (OPTIONAL) -p --par max number of parallel threads (OPTIONAL) -o --outdir output directory for stdout files (OPTIONAL) -e --errdir output directory for stderr files (OPTIONAL) -t --timeout timeout (secs) (-1 = no timeout) per host (OPTIONAL) -O --options SSH options (OPTIONAL) -v --verbose turn on warning and diagnostic messages (OPTIONAL) EXAMPLE
An example to copy /home/irb2/foo.txt from each host. Files gathered will be stored in /tmp/outdir/hostname/foo.txt. # prallel-slurp -h hosts.txt -L /tmp/outdir -l irb2 /home/irb2/foo.txt foo.txt ENVIRONMENT
All four programs take similar sets of options. All of these options can be set using the following environment variables: o PSSH_HOSTS o PSSH_USER o PSSH_PAR o PSSH_OUTDIR o PSSH_VERBOSE o PSSH_OPTIONS SEE ALSO
parallel-ssh(1), parallel-scp(1), parallel-nuke(1), parallel-rsync(1), ssh(1) AUTHOR
Brent N. Chun <bnc@theether.org> COPYING
Copyright: 2003, 2004, 2005, 2006, 2007 Brent N. Chun NOTES
1. bnc@theether.org mailto:bnc@theether.org 03/30/2009 PARALLEL-SLURP(1)
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