我的 access.log 文件包含 1000 多个 X-Forwarded-For 日志条目,如下所示
142.245.59.16, 67.69.175.224, 69.31.97.126 - - [22/Sep/2015:20:00:02 -0400] "GET /company-information/cs/null?path=%
157.55.39.76, 184.27.179.176, 165.254.1.175 - - [22/Sep/2015:20:00:05 -0400] "GET /metricstream/--ID__100325--/free-co-profile.xhtml
10.70.33.32 - - [22/Sep/2015:20:00:22 -0400] "GET /autodiscover/autodiscover.xml
172.30.152.90, 198.178.234.30, 184.27.120.46, 69.31.97.126 - - [22/Sep/2015:20:03:37 -0400] "GET /company-information/cs/null?path
有了这个日志条目,我必须 grep 并将它们提取到 access_log.txt 文件中,如下面的输出
142.245.59.16 - - [22/Sep/2015:20:00:02 -0400] "GET /company-information/cs/null?path=%
157.55.39.76 - - [22/Sep/2015:20:00:05 -0400] "GET /metricstream/--ID__100325--/free-co-profile.xhtml
10.70.33.32 - - [22/Sep/2015:20:00:22 -0400] "GET /autodiscover/autodiscover.xml
172.30.152.90 - - [22/Sep/2015:20:03:37 -0400] "GET /company-information/, csnull ?path
即保留第一个 ip 并删除以下两个或多个 ip,我也厌倦了 REGEX:/\, .*?\ -/g
但我不知道如何在 unix sed 命令中应用它。请帮助使用 Unix 命令解决这个问题