服务器评测
wc 命令用于统计文件内容的行数、单词数、字母数。但是如果想统计一个目录下所有文件的行数，wc 并没有提供递归统计。
不过，可以结合 find 命令，例如：
$ wc -l `find -name *.c`
其中，-l 参数是统计行数，find -name *.c 是查找当前目录（包含子目录）下所有的C文件，` ` 是 shell 中的替换命令。
当然，实现方法有很多，我只是觉得这个比较简单易记。
测试效果如下：
最后，附一下 wc 的使用帮助（man wc）
NAME
wc – print newline, word, and byte counts for each file
SYNOPSIS
wc [OPTION]… [FILE]…
wc [OPTION]… –files0-from=F
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.
-c, –bytes
print the byte counts
-m, –chars
print the character counts
-l, –lines
print the newline counts
–files0-from=F
read input from the files specified by NUL-terminated names in file F; If F is – then read names from standard input
-L, –max-line-length
print the length of the longest line
-w, –words
print the word counts
–help display this help and exit
–version
output version information and exit
本文永久更新链接地址：http://www.linuxidc.com/Linux/2015-02/114051.htm
