wc

Count lines, words, and bytes. More information: https://www.gnu.org/software/coreutils/manual/html_node/wc-invocation.html.

• Count all lines in a file:

wc --lines path/to/file

• Count all words in a file:

wc --words path/to/file

• Count all bytes in a file:

wc --bytes path/to/file

• Count all characters in a file (taking multi-byte characters into account):

wc --chars path/to/file

• Count all lines, words and bytes from stdin:

find . | wc

• Count the length of the longest line in number of characters:

wc --max-line-length path/to/file