= Notes related to management of personal photo albums =
 * Stoye photos in directory structure  /yyyy/yyyymmdd/<photos>.jpg
 * Problem is the following
   1. keeping multiple backups
   1. syncing them reliably
      1. detecting corrupt photos before syncing
      1. merging photo changes
      1. detecting duplicates, e.g. dir rename etc.

== using hashdeep to detect corruption ==
 * hashdeep creates md5+sha256 checksums and saves them, then can be used later to verify files have not changed.
 * Create hash -r=recursive , -l relative file paths {{{
hashdeep -rl  Photos/{19*,20*,jokes} | tee $(date +"./Photos/hashdeep/%Y%m%d-hashdeep.hash.txt")
}}}
 * Audit hash -a audit -k load known hashes {{{
hashdeep -rl -a -k ./Photos/hashdeep/$1 Photos/{19*,20*,jokes} | tee $(date +"./Photos/hashdeep/%Y%m%d-hashdeep.audit.txt")
}}}
 * with (export hashfile=hashfile.txt) 
   * get all duplicates {{{
cat $hashfile | sort | uniq -w100 -D 
}}}
   * get 0 byte files {{{
cat $hashfile | grep "^0,"
}}}
   * get small files 10-999bytes {{{
cat $hashfile | grep "^...,"
}}}