Linux: count number of files in a directory

The following command will print the number of files in the current directory:

ls | wc -l

The ‘ls’ command prints the directory listing. The output of ls is piped into the wc command by the inclusion of the ‘|’. Finally, the ‘wc’ command performs a word count on the directory listing it was given, and because ls outputs each filename as a word, you get the number of files in the directory.

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