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Top Forums Shell Programming and Scripting Problem renaming files using variables Post 302782145 by hubleo on Monday 18th of March 2013 10:31:20 AM
Old 03-18-2013
Problem renaming files using variables

Hi, I have the following problem:

I have a list of files:
Code:
1.txt
2.txt
3.txt
4.txt

Then I have a list of variable names inside variable.txt:
Code:
A
B
C
D

I'd like to rename 1.txt, 2.txt etc using the variables from variable.txt
Code:
 
A.txt (Contains info from 1.txt)
B.txt (Contains info from 2.txt)
C.txt (Contains info from 3.txt)
D.txt (Contains info from 4.txt)

I've tried using this, but it doesn't work
Code:
END=4
for ((i=1;i<=END;i++)); do for j in $(cat variable.txt); do mv "$i".txt "$j".txt; done; done

When doing this, I get a list of files
Code:
 
A.txt  > (Contains info from 4.txt)
B.txt  > (Contains info from 4.txt)
C.txt  > (Contains info from 4.txt)
D.txt  > (Contains info from 4.txt)

but want

A.txt (Contains info from 1.txt)
B.txt (Contains info from 2.txt)
C.txt (Contains info from 3.txt)
D.txt (Contains info from 4.txt)

Something is going wrong with the loop and can't work out why it's doing this. I'm trying to learn scripting/loops and any help would be appreciated. Many thanks
 

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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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