grep - grep 可以只显示匹配搜索模式的单词吗？

Question

有没有办法让 grep 从匹配搜索表达式的文件中输出“单词”？

如果我想在多个文件中找到“th”的所有实例，我可以这样做:

grep "th" *

但是输出会是这样的(粗体是我的)；

some-text-file : the cat sat on the mat  some-other-text-file : the quick brown fox  yet-another-text-file : i hope this explains it thoroughly 

What I want it to output, using the same search, is:

the
the
the
this
thoroughly

这可以使用 grep 吗？还是使用另一种工具组合？

Answer 1

试试grep -o:

grep -oh "\w*th\w*" *

编辑:匹配 Phil 的评论。

来自 the docs :

-h, --no-filename
    Suppress the prefixing of file names on output. This is the default
    when there is only  one  file  (or only standard input) to search.
-o, --only-matching
    Print  only  the matched (non-empty) parts of a matching line,
    with each such part on a separate output line.