Recursively counting files in a Linux directory

 

How can I recursively count files in a Linux directory?

I found this: 

find DIR_NAME -type f ¦ wc -l

But when I run this it returns the following error.

find: paths must precede expression: ¦

This should work: 

find DIR_NAME -type f | wc -l

Explanation:

  • -type f to include only files.
  • | ( and not ¦ ) redirects find command's standard output to wc command's standard input.
  • wc (short for word count) counts newlines, words and bytes on its input (docs).
  • -l to count just newlines.

    • Notes:

  • Replace DIR_NAME with . to execute the command in the current folder.
  • You can also remove the -type f to include directories (and symlinks) in the count.
  • It's possible this command will overcount if filenames can contain newline characters.

    • Explanation of why your example does not work:

    In the command you showed, you do not use the "Pipe" ( | ) to kind-of connect two commands, but the broken bar ( ¦ ) which the shell does not recognize as a command or something similar. That's why you get that error message.

    对于当前目录： 

    find . -type f | wc -l

    If you want a breakdown of how many files are in each dir under your current dir: 

    for i in $(find . -maxdepth 1 -type d) ; do 
    echo -n $i": " ; 
    (find $i -type f | wc -l) ; 
done

    That can go all on one line, of course. The parenthesis clarify whose output wc -l is supposed to be watching ( find $i -type f in this case).

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