如何使用grep过滤Apache虚拟主机列表

Question

我有一个配置了许多虚拟主机的Apache服务器，并希望能够使用grep过滤它们，如下所示。

# httpd -S | grep "myStr"

。。然而，这种方法不起作用-我仍然看到我所有的虚拟主机都列出了。你知道我怎么才能做到这一点吗？

以下是httpd -S的输出示例

[root@224136 config]# httpd -S
VirtualHost configuration:
184.22.xxx.33:80       is a NameVirtualHost
         default server default (/etc/httpd/conf/kloxo/default.conf:4)
         port 80 namevhost default (/etc/httpd/conf/kloxo/default.conf:4)
         port 80 namevhost webmail (/etc/httpd/conf/kloxo/webmail.conf:6)
         port 80 namevhost xxxxxx.com (/home/httpd/xxxxxx.com/conf/kloxo.xxxxxxx.com:4)
         port 80 namevhost twptest.xxxxxx.com (/home/httpd/twptest.xxxxxx.com/conf/kloxo.twptest.xxxxxx.com:4)
         port 80 namevhost yyyyyyy.com (/home/httpd/yyyyyy.com/conf/kloxo.yyyyyyy.com:4)
         port 80 namevhost zzzzzzzz.com (/home/httpd/zzzzzzz.com/conf/kloxo.zzzzzzzz.com:4)
         port 80 namevhost expenses.zzzzzzzz.com (/home/httpd/expenses.zzzzzzz.com/conf/kloxo.expenses.zzzzzzz.com:4)
         port 80 namevhost aaaaaaaa.cz (/home/httpd/aaaaaaaaaaaa.cz/conf/kloxo.aaaaaaaaaaa.cz:4)
         port 80 namevhost aaaaaaaaaaa.cz (/home/httpd/aaaaaaaaaaaaa.cz/conf/kloxo.aaaaaaaaaa.cz:142)

Answer 1

既然您说“我仍然看到列出了我所有的虚拟主机”，我怀疑您需要将STDERR重定向到STDOUT，如下所示(假设bash) out.py只是一个使用sys.stderr.write()将一些输出写到STDERR的output脚本

$ ./out.py | grep zzzzzzzz

VirtualHost configuration:
184.22.xxx.33:80       is a NameVirtualHost
         default server default (/etc/httpd/conf/kloxo/default.conf:4)
         port 80 namevhost default (/etc/httpd/conf/kloxo/default.conf:4)
         port 80 namevhost webmail (/etc/httpd/conf/kloxo/webmail.conf:6)
         port 80 namevhost xxxxxx.com (/home/httpd/xxxxxx.com/conf/kloxo.xxxxxxx.com:4)
         port 80 namevhost twptest.xxxxxx.com (/home/httpd/twptest.xxxxxx.com/conf/kloxo.twptest.xxxxxx.com:4)
         port 80 namevhost yyyyyyy.com (/home/httpd/yyyyyy.com/conf/kloxo.yyyyyyy.com:4)
         port 80 namevhost zzzzzzzz.com (/home/httpd/zzzzzzz.com/conf/kloxo.zzzzzzzz.com:4)
         port 80 namevhost expenses.zzzzzzzz.com (/home/httpd/expenses.zzzzzzz.com/conf/kloxo.expenses.zzzzzzz.com:4)
         port 80 namevhost aaaaaaaa.cz (/home/httpd/aaaaaaaaaaaa.cz/conf/kloxo.aaaaaaaaaaa.cz:4)
         port 80 namevhost aaaaaaaaaaa.cz (/home/httpd/aaaaaaaaaaaaa.cz/conf/kloxo.aaaaaaaaaa.cz:142)

现在将STDERR发送到STDOUT：

$ ./out.py 2>&1 | grep zzzzzzzz
         port 80 namevhost zzzzzzzz.com (/home/httpd/zzzzzzz.com/conf/kloxo.zzzzzzzz.com:4)
         port 80 namevhost expenses.zzzzzzzz.com (/home/httpd/expenses.zzzzzzz.com/conf/kloxo.expenses.zzzzzzz.com:4)

Answer 2

我只是有同样的需求，并使用了以下内容：

 /usr/sbin/apache2ctl -S 2>&1 | awk '/namevhost/  {print $4;} '

它将SDTERR (2)重定向到STDOUT (&1)，然后让awk清理它