Linux: find and move files to directory

Find and move

Find files with extension in currect directory

find . -maxdepth 1 -name '*.wav' -exec mv -t to_dir {} +

Find files with extension in directory and its subdirectories

find .  -name '*.wav' -exec mv -t to_dir {} +

Extras:

Find and count:

find . -name "*.wav" | wc -l

Stats per extension:

find . -name '?*.*' -type f -printf '%b.%f\0' |
awk -F . -v RS='\0' '
{s[$NF] += $1; n[$NF]++}
END {for (e in s) printf "%15d %4d %s\n", s[e]*512, n[e], e}' |
sort -n

eg:

size,  file count, extension
     4556288000    1 tgz
     5416792064  256 zip
     8554487808 1178 gz
    20127576064   16 mkv
    73349218304 457198 wav