Count all files in a directory and subdirectories (linux)

First, we need to find needed files, using the 'find' command. The find utility recursively descends the directory tree for each path listed, evaluating an expression in terms of each file in the tree. Next, we need to count lines, using wc (word, line, character, and byte count) command with -l (lines) parameter.

Let's count all *.conf files in directory and all subdirectories:

find . -name '*.conf' -type f | wc -l