The photos of my cameras (.CR2 or .JPG) have correct exif date + time but only in seconds, unfortunately not in milliseconds. Therefore some photos have the same date_time value (shot at the same second).The photos are saved in sub-folders which is why creating unique filenames (beyond all folders) just by date_time is not possible with exiv2.Initial situation example:Folder 1 / 2016_12_01_1326.JPGFolder 1 / 2016_12_02_1830.CR2Folder 2 / 2016_12_01_1326.JPG (same date, hours, and seconds but not milliseconds)I would like to create symbolic links with unique name for all of my photos.My idea for solving this problem is by converting the filenames of the photos to date-time with exiv4 and the symbolic links with the same name plus an ongoing number.So finally the result of the symbolic links should be for example:2016_12_01_1326_0001.JPG2016_12_01_1326_0002.JPG2016_12_02_1830_0003.CR2My approach is the following but it doesn't work with the ongoing number:f=$(pwd);export f;var=0; export var;find 2016/. \( -name *.CR2 -o -name *.JPG \) -execdir sh -c 'ln -s $PWD/$(basename {}) $f/2016_Links/Pictures/Link_$((var++))_$(basename {})' {} \;The $((var++)) is not working due to the following error:./20160312_09_02_42.CR2: 1: ./20160312_09_02_42.CR2: arithmetic expression: expecting primary: var++
Create symbolic link recursively for pictures with unique filename altough timestamp is not enough
shell script;symlink;recursive