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Top Forums Shell Programming and Scripting Making a script to copy files not seen before (using md5sum) Post 302849217 by gacanepa on Saturday 31st of August 2013 11:19:17 AM
Old 08-31-2013
This will do the trick:
Code:
#!/bin/bash
set -x

# The source directory where the photo folder on the phone is mirrored to
SRC=test1

# The destination directory where we want to copy only new photos we have copied before
DST=test2

# The MD5 list file that tracks which files we have copied before
MD5=/hd1/home/nick/test1.md5

# Check files against the MD5 list and then copy if not previously copied
# Then add the md5 for that file to the MD5 list
for f in $SRC/*
do
  FMD5=$(md5sum $f)
  grep -q $FMD5 $MD5
  if [[ $? -ne 0 ]]; then
    cp $SRC/$f $DST
    md5sum $f >> $MD5
  fi
done

Once you fixed the shell expansion thing you had to revert to a relative pathname for both the source and the destination.
This User Gave Thanks to gacanepa For This Post:
 

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Apache::Session::Generate::MD5(3pm)			User Contributed Perl Documentation		       Apache::Session::Generate::MD5(3pm)

NAME
Apache::Session::Generate::MD5 - Use MD5 to create random object IDs SYNOPSIS
use Apache::Session::Generate::MD5; $id = Apache::Session::Generate::MD5::generate(); DESCRIPTION
This module fulfills the ID generation interface of Apache::Session. The IDs are generated using a two-round MD5 of a random number, the time since the epoch, the process ID, and the address of an anonymous hash. The resultant ID number is highly entropic on Linux and other platforms that have good random number generators. You are encouraged to investigate the quality of your system's random number generator if you are using the generated ID numbers in a secure environment. This module can also examine session IDs to ensure that they are, indeed, session ID numbers and not evil attacks. The reader is encouraged to consider the effect of bogus session ID numbers in a system which uses these ID numbers to access disks and databases. This modules takes one argument in the usual Apache::Session style. The argument is IDLength, and the value, between 0 and 32, tells this module where to truncate the session ID. Without this argument, the session ID will be 32 hexadecimal characters long, equivalent to a 128-bit key. AUTHOR
This module was written by Jeffrey William Baker <jwbaker@acm.org>. SEE ALSO
Apache::Session perl v5.10.1 2010-10-18 Apache::Session::Generate::MD5(3pm)
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