今天在执行以下命令的时候：
[root@SOR_SYS zy]# grep -c 'model name' /proc/cpuinfo
4
这个命令的意思是查看cpu的个数，刚开始我还有些疑惑：-c的作用是什么呢？
然后我就查了一下命令，grep的参数是如是解释的：
-c, --count
Suppress normal output; instead print a count of matching lines for each input file. With the -v,
--invert-match option (see below), count non-matching lines.
下面我们对grep进行简单的总结
NAME
grep, egrep, fgrep - print lines matching a pattern
SYNOPSIS
grep [options] PATTERN [FILE...]
grep [options] [-e PATTERN | -f FILE] [FILE...]
DESCRIPTION
Grep searches the named input FILEs (or standard input if no files are named, or the file name - is given) for
lines containing a match to the given PATTERN. By default, grep prints the matching lines.
In addition, two variant programs egrep and fgrep are available. Egrep is the same as grep -E. Fgrep is the
same as grep -F.
有什么不懂的就去查看grep的参数！O(∩_∩)O~