Unix wc Command
$ cat letter
Final exams are coming up next week.
Please send food and money.
Run the wc command on this file:
$ wc letter
8 16 90 letter
wc command tells you that this file has 8 line, 16 words, and 90 characters.
You can display just the number of lines using the l option, the number of words by using the w option, or the number of characters by using the c option.
Here is the same command using the l option:
This limits the output to just the number of lines in the letter file.
$ wc –l letter