Count All File Extension Types in Linux

Here's a command to check how many of each file type (extension) exists in your present directory and subdirectories:

find . -type f | sed -n 's/.*\.//p' | sort | uniq -c | sort -nr

Example output, ran on my photos directory:

  34902 JPG
  25068 HEIC
   1160 MOV
   1144 jpg
    398 JPEG
    128 tif
    112 PNG
     66 AVI
     62 DNG
     14 png
     11 mp4
     11 heic
      7 MPG
      6 MP4
      5 mov
      2 wmv
      2 jpeg
      2 3gp
      1 3GP

If you want the list to be case insensitive, such that jpg and JPG files count as the same extension, add a pipe to tr in the command:

find . -type f | sed -n 's/.*\.//p' | tr '[:upper:]' '[:lower:]' | sort | uniq -c | sort -nr

Case insensitive output:

  36046 jpg
  25079 heic
   1165 mov
    400 jpeg
    128 tif
    126 png
     66 avi
     62 dng
     17 mp4
      7 mpg
      3 3gp
      2 wmv

In case you want to exclude subdirectories, use the -maxdepth option:

find . -type f -maxdepth 1 | sed -n 's/.*\.//p' | sort | uniq -c | sort -nr