linux工具的使用

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１：判断一个服务器的状态，是否可以connect，只需要输入：

nc -v -w 2 113.106.94.104 -z 1017-1019

nc -v -w 连接失败后重复次数　　ip -z 端口号

２：获取http的详细信息

curl -vosa http://www.baidu.com

alen@alen:~$ curl -vosa http://www.baidu.com* Rebuilt URL to: http://www.baidu.com/* Hostname was NOT found in DNS cache  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current                                 Dload  Upload   Total   Spent    Left  Speed  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0*   Trying 112.80.248.73...* Connected to www.baidu.com (112.80.248.73) port 80 (#0)> GET / HTTP/1.1> User-Agent: curl/7.35.0> Host: www.baidu.com> Accept: */*> < HTTP/1.1 200 OK* Server bfe/1.0.8.18 is not blacklisted< Server: bfe/1.0.8.18< Date: Tue, 13 Sep 2016 07:56:02 GMT< Content-Type: text/html< Content-Length: 2381< Last-Modified: Mon, 25 Jul 2016 11:12:14 GMT< Connection: Keep-Alive< ETag: "5795f40e-94d"< Cache-Control: private, no-cache, no-store, proxy-revalidate, no-transform< Pragma: no-cache< Accept-Ranges: bytes<

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