curl命令还能这样用？

curl命令还能这样用？

直接上图↓

图1

上面的命令，可以查看/dev/null？不加的话，会把响应也显示出来，看起来不够美观了~

那图1为啥还要加-s命令呢？如果不加的话，会显示下面的进度条信息↓

这个命令对于计算机网络学的好的同学来说，简直就是神器了，numerical response code that was found in the last retrieved HTTP(S) or FTP(s) transfer. In 7.18.2 the alias response_code was added to show the same info.

numerical code that was found in the last response (from a proxy) to a curl CONNECT request. (Added in 7.12.4)

version that was effectively used. (Added in 7.50.0)

num_connects Number of new connects made in the recent transfer. (Added in 7.12.3)

num_redirects Number of redirects that were followed in the request. (Added in 7.12.3)

得到http请求各个环节的耗时情况，就可以定位瓶颈所在，展开进一步的排查和优化了~

预告一下，下篇文章将会给大家介绍下时序数据库openTSDB，敬请期待~

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