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Full Discussion: Renaming a bunch of files
Top Forums Shell Programming and Scripting Renaming a bunch of files Post 302242894 by tokland on Friday 3rd of October 2008 07:13:37 AM
Old 10-03-2008
Java Renaming a bunch of files
This is possibly a FAQ, but I was unable to find an answer: let's say you have two files named "hello.txt" and "goodbye.txt" and you want them to be "hi.txt" and "seeyou.txt". The typical regular expressions renamer apps do not apply, as you want different new names for each one of the files. The first logical step is creating a text file with the new names:

Code:
hi.txt
seeyou.txt

Then, using the command paste I got that:

Code:
#!/bin/bash
# Usage: rename_from_file.sh newfilenames.txt hello.txt goodbye.txt
set -e
NEWFILENAMES=$1
shift
for FILENAME in "$@"; do 
    echo "$FILENAME" 
done | paste - $NEWFILENAMES | tr '\n' '\t' | xargs -rt -d"\t" -n2 mv

Seeking a one-liner solution I came across the interesting "process substitution" bash feature, and this is what I got (still using paste):

Code:
#!/bin/bash
# Usage: rename_from_file.sh hello.txt goodbye.txt <newfilenames.txt
paste <(for FILE in "$@"; do echo "$FILE"; done) - | tr '\n' '\t' | xargs -rt -d"\t" -n2 mv

I cannot say I am proud of it, so... any better ideas?

regards
 

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LEARN ABOUT DEBIAN

parallel-slurp

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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