我目前面临一个问题。当我打开dnsmasq日志时，它看起来像这样：
Jun 10 17:50:00 dnsmasq[21796]: query[A] isatap.lan from 115.34.22.160
Jun 10 17:50:00 dnsmasq[21796]: cached isatap.lan is NXDOMAIN-IPv4
Jun 10 17:50:21 dnsmasq[21796]: query[A] isatap.lan from 115.34.22.160
Jun 10 17:50:21 dnsmasq[21796]: cached isatap.lan is NXDOMAIN-IPv4
Jun 10 17:50:31 dnsmasq[21796]: query[A] isatap.lan from 115.34.22.160
Jun 10 17:50:31 dnsmasq[21796]: cached isatap.lan is NXDOMAIN-IPv4
Jun 10 17:50:37 dnsmasq[21796]: query[A] isatap.lan from 115.34.22.160
Jun 10 17:50:37 dnsmasq[21796]: cached isatap.lan is NXDOMAIN-IPv4
Jun 10 17:50:40 dnsmasq[21796]: query[A] zyx.qq.com from 115.34.22.160
Jun 10 17:50:40 dnsmasq[21796]: forwarded zyx.qq.com to 114.114.114.114
Jun 10 17:50:40 dnsmasq[21796]: forwarded zyx.qq.com to 223.5.5.5
Jun 10 17:50:40 dnsmasq[21796]: reply zyx.qq.com is 123.151.43.51
Jun 10 17:50:40 dnsmasq[21796]: reply zyx.qq.com is 183.60.62.158
Jun 10 17:50:40 dnsmasq[21796]: reply zyx.qq.com is 113.108.1.90
Jun 10 17:50:42 dnsmasq[21796]: query[A] isatap.lan from 115.34.22.160
Jun 10 17:50:42 dnsmasq[21796]: cached isatap.lan is NXDOMAIN-IPv4
Jun 10 17:50:52 dnsmasq[21796]: query[A] isatap.lan from 115.34.22.160
Jun 10 17:50:52 dnsmasq[21796]: cached isatap.lan is NXDOMAIN-IPv4
Jun 10 17:50:58 dnsmasq[21796]: query[A] ic.wps.cn from 115.34.22.160
AND ETC.
我们很难分析它。任何人都有想法只显示查询域应该是这样的吗？
isatap.lan
zyx.qq.com
ic.wps.cn
AND ETC.
但是我试过这个： http://www.tannerwilliamson.com/analyzing-dnsmasq-log-with-awk/1610/
及其输出我喜欢这个：
root@VM-208-178-ubuntu:/home# awk -f /home/dnsmasq.awk /var/log/dnsmasq.log | less
name | nb | forwarded | answered from cache
irs01.net | 1 | 1 | 0
927662-0-2081296634-261190004.ns.124-14-16-250-ns.dns-spider.ffdns.net | 1 | 1 | 0
blog.sina.com.cn | 4 | 4 | 1
927655-0-2081296634-261190004.ns.124-14-16-250-ns.dns-spider.myxns.cn | 1 | 1 | 0
www.baidu.com | 2 | 2 | 0
* careers.stackoverflow.com | 10 | 13 | 0
blender.stackexchange.com | 2 | 2 | 0
974449-0-2081296634-261190004.ns.124-14-16-250-ns.dns-spider.myxns.cn | 1 | 1 | 0
img.iknow.bdimg.com | 2 | 1 | 1
* smarterer.com | 2 | 3 | 0
a.disquscdn.com | 1 | 1 | 0
927648-0-2081296634-261190004.ns.124-14-16-250-ns.dns-spider.myxns.cn | 1 | 1 | 0
physics.stackexchange.com | 6 | 5 | 4
* area51.stackexchange.com | 2 | 3 | 0
iknow02.bosstatic.bdimg.com | 2 | 1 | 1
passport.baidu.com | 1 | 1 | 0
webapps.stackexchange.com | 5 | 4 | 4
与我想要的有点不同。有人可以帮帮我吗？ 谢谢你的帮助！
答案 0 :(得分：0)
如果您显示的日志文件保持不变，那么简单的awk脚本就足够了。
awk '!seen[$6]++ {print $6}' file
将产生输出
ic.wps.cn
isatap.lan
zyx.qq.com
逻辑很简单，它解析第六列中的每个条目并将其添加到数组seen中，并仅在以前看不到它时打印该元素。
P.S。如果日志文件中列的顺序将来可能会发生变化，awk命令可能无效，因为它完全依赖于列的索引来获取结果。