wc command-Count the number of bytes, words, and lines of a file

The wc command counts the number of bytes, words, and lines in the specified file, and displays and outputs the statistical results. Using the wc command, we can calculate the number of bytes, words, or columns of the file. If the file name is not specified, or the given file name is "-", the wc command will read data from the standard input device. wc also gives the presidential count of the specified file.

Syntax: wc [parameter] [file]

Common parameters:

-w	Count the number of words, or --words: display only the number of words. A word is defined as a string separated by whitespace, tabs, or newline characters
-c	Count the number of bytes, or --bytes or --chars: only display the number of bytes
-l	Count the number of lines, or --lines: display only the number of columns
-m	Count the number of characters
-L	Print the length of the longest line
--help	Display help information
--version	Display version information

Example

Count words:

[root@linuxstar ~]# cat test.txt hello world hello world hello world hello world hello world [root@linuxstar ~]# wc -w test.txt 10 test.txt

Statistics bytes:

[root@linuxstar ~]# wc -c test.txt 60 test.txt

Count the number of characters:

[root@linuxstar ~]# wc -m test.txt 60 test.txt

Statistics rows:

[root@linuxstar ~]# wc -l test.txt 4 test.txt

Print the length of the longest line:

[root@linuxstar ~]# wc -L test.txt 23 test.txt