# exiftool > Read and write meta information in files. > More information: . - Remove all EXIF metadata from the given files: `exiftool -All= {{file1 file2 ...}}` - Move the date at which all photos in a directory were taken 1 hour forward: `exiftool "-AllDates+=0:0:0 1:0:0" {{path/to/directory}}` - Move the date at which all JPEG photos in the current directory were taken 1 day and 2 hours backward: `exiftool "-AllDates-=0:0:1 2:0:0" -ext jpg` - Only change the `DateTimeOriginal` field subtracting 1.5 hours, without keeping backups: `exiftool -DateTimeOriginal-=1.5 -overwrite_original` - Recursively rename all JPEG photos in a directory based on the `DateTimeOriginal` field: `exiftool '-filename