与 unix 中的命令 wc -l 和 wc 混淆

Question

In the file.txt , it contains

Good is good
Bad
Gp
TR

What I run the command

wc file.txt 

it produces 4 6 23..........I still don't quite understand how do 4 6 23 arrive?

Also when I run the command

wc -l file.txt

it produces 4 which means the number of rows in the file..Am I right?

Answer 1

it produces 4 6 23..........I still don't quite understand how do 4 6 23 arrive?

It means:

• 4 denotes that there are 4 lines in complete Input_file.
• 6 denotes that there are 6 words in complete Input_file.
• 23 tells us that there are 23 characters present in whole file.

So this output only comes when we do not pass any option to wc , in case you need to get these details very specifically then use something like: wc -l to get lines and wc -c to get number of characters in Input_file.

From man wc :

DESCRIPTION Print newline, word, and byte counts for each FILE, and a total line if more than one FILE is specified. With no FILE, or when FILE is -, read standard input. A word is a non-zero-length sequence of characters delimited by white space. The options below may be used to select which counts are printed, always in the following order: newline, word, character, byte, maximum line length.