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Full Discussion: Renaming files in one file from names in other
Top Forums UNIX for Dummies Questions & Answers Renaming files in one file from names in other Post 302504366 by ctsgnb on Monday 14th of March 2011 12:01:43 PM
Old 03-14-2011
please provide :

Code:
cat /Users/pawannoel/Desktop/a.txt
cat /Users/pawannoel/Desktop/b.txt
cat b.txt | xargs -i ls /Users/pawannoel/Documents/Sequences/Sanger_Sequencing_results/{}

run this :

Code:
ksh
cd /Users/pawannoel/Desktop
unset t v n
MYDIR=/Users/pawannoel/Documents/Sequences/Sanger_Sequencing_results
paste ./b.txt ./a.txt | while read a b
do
[[ ! -f "$MYDIR/$a" ]] && echo "$MYDIR/$a does not exists, script abort" && break
echo "before assignment t=$t v=$v n=$n a=$a b=$b"
t=${b##*_}
v=$(echo $b | sed 's/.*_//;s/-/+/')
n=${b%$t}$(( ($v) / 2 )).${a#*.}
echo "before mv t=$t v=$v n=$n a=$a b=$b"
echo "mv $MYDIR/$a $MYDIR/$n"
mv "$MYDIR/$a" "$MYDIR/$n"
unset t v n
echo "after unset t=$t v=$v n=$n a=$a b=$b"
done

And copy paste the output you will get
 

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LEARN ABOUT PHP

rename

RENAME(3)								 1								 RENAME(3)

rename - Renames a file or directory

SYNOPSIS

       bool rename (string  $oldname, string  $newname, [resource  $context])

DESCRIPTION

	Attempts to rename $oldname to $newname, moving it between directories if necessary. If $newname exists, it will be overwritten.

PARAMETERS

	      o $oldname
		-

	      Note

		      The old name. The wrapper used in $oldname must match the wrapper used in $newname.

	      o $newname
		- The new name.

	      o $context
		-

	      Note

		     Context support was added with PHP 5.0.0. For a description of contexts, refer to "Streams".

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.3.1	|						    |
       |	|						    |
       |	| rename(3)  can  now rename files across drives in |
       |	| Windows.					    |
       |	|						    |
       | 5.0.0	|						    |
       |	|						    |
       |	| rename(3) can now also  be  used  with  some	URL |
       |	| wrappers. Refer to "Supported Protocols and Wrap- |
       |	| pers" for a listing  of  which  wrappers  support |
       |	| rename(3).					    |
       |	|						    |
       | 4.3.3	|						    |
       |	|						    |
       |	| rename(3)  may now be able to rename files across |
       |	| partitions on *nix based  systems,  provided	the |
       |	| appropriate permissions are held. Warnings may be |
       |	| generated if the destination	filesystem  doesn't |
       |	| permit chown() or chmod() system calls to be made |
       |	| on files  --	for  example,  if  the	destination |
       |	| filesystem is a FAT filesystem.		    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      Example with rename(3)

	      <?php
	      rename("/tmp/tmp_file.txt", "/home/user/login/docs/my_file.txt");
	      ?>

SEE ALSO

       copy(3), unlink(3), move_uploaded_file(3).

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