Extracting a file type recursively from a directory using find {linux}
FInd - search for files in a directory hierarchy.
Usage(general)
find <search directory> <search pattern> <action>
Example(finding all jpeg(s) in current dir)
find . -iname \*.jpeg -print0
Xargs - build and execute command lines from standard input
cp -v {} /dir/where/to/put/it
grep searches for PATTERNS in each FILE.
required command(to extract all the pictures) >
find . -name '*' -exec file {} \; | grep -o -P '^.+: \w+ image' | cut -d':' -f1 | xargs -I{} cp -v {} /dir/where/to/put/it