Find a list of files in directory, move to new, allow duplicates Post: 302911988

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Top Forums UNIX for Dummies Questions & Answers Find a list of files in directory, move to new, allow duplicates Post 302911988 by bakunin on Tuesday 5th of August 2014 04:29:00 AM

08-05-2014

Registered User

Quote:

Originally Posted by jim mcnamara

Code:

find /path/to/files -type f  | grep -Ff text_file_with_file_names > outputfile

while read filename
do
  mv $filename   /path/to/somewhere/
done <outputfile

That said - DO NOT agglomerate zillions of user data files adhoc in one file tree.
It is completely possible to have parked those files into meaningful directory names - i.e., the text you are using as a key. Then you can simply look for a directory and go from there. Pre-planning beats kludge like this every time.

Concur! Especially for the last Sentence!

Quote:

Originally Posted by jim mcnamara

PS: because you want to run this ONE time there is a huge performance penalty:
grep -Ff filename has to scan the entire 300 lines of filename for every file it finds. And since you seem to have large numbers of files be prepared to wait.

True. Here is my take at it, based on yours. The rationale is that after the first scan the inode list is cached in memory and the next finds will go a lot faster:

Code:

while read FILEMASK ; do
     find /path/to/sourcedir -type f -name "*${FILEMASK}*" |\
          while read MOVEFILE ; do
               FNAME="${MOVEFILE##*/}"
               if [ -f "/path/to/targetdir/$FNAME" ] ; then
                    mv "$MOVEFILE" "/path/to/targetdir/${FNAME}.$$"
               else
                    mv "$MOVEFILE" "/path/to/targetdir"
               fi
          done
done < /path/to/list.of.filemasks

Note that no security provisions are put into place: checks for exhausted diskspace, successful move operation, etc.. are all missing and you should add them before putting this sketch into a fire-and-forget script.

I hope this helps.

bakunin

bakunin

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LEARN ABOUT LINUX

bzgrep

BZGREP(1)						      General Commands Manual							 BZGREP(1)

NAME

       bzgrep, bzfgrep, bzegrep - search possibly bzip2 compressed files for a regular expression

SYNOPSIS

       bzgrep [ grep_options ] [ -e ] pattern filename...
       bzegrep [ egrep_options ] [ -e ] pattern filename...
       bzfgrep [ fgrep_options ] [ -e ] pattern filename...

DESCRIPTION

       Bzgrep  is  used to invoke the grep on bzip2-compressed files. All options specified are passed directly to grep.  If no file is specified,
       then the standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and  fed	to
       grep.

       If  bzgrep  is  invoked as bzegrep or bzfgrep then egrep or fgrep is used instead of grep.  If the GREP environment variable is set, bzgrep
       uses it as the grep program to be invoked. For example:

	   for sh:  GREP=fgrep	bzgrep string files
	   for csh: (setenv GREP fgrep; bzgrep string files)

AUTHOR

       Charles Levert (charles@comm.polymtl.ca). Adapted to bzip2 by Philippe Troin <phil@fifi.org> for Debian GNU/Linux.

SEE ALSO

       grep(1), egrep(1), fgrep(1), bzdiff(1), bzmore(1), bzless(1), bzip2(1)

																	 BZGREP(1)