linux - uniq -c 不适用于 awk？

Question

我有一个包含多个数据的日志文件，我想从该文件中过滤 DHCPREQUEST IP，我想计算日志文件中针对该服务内容的 IP 请求有多少次是这样的:-

Mar 22 11:20:34 DHCP-IP dhcp: DHCPREQUEST for 10.1.1.1 from aa:00:00:00:00:00 (pc) via 10.1.1.2
Mar 22 11:19:34 DHCP-IP dhcp: DHCPREQUEST for 10.1.1.2 from aa:00:00:00:00:00 (pc) via 10.1.1.2
Mar 22 11:18:34 DHCP-IP dhcp: DHCPREQUEST for 10.1.1.2 from aa:00:00:00:17:00 (pc) via 10.1.1.2
Mar 22 11:16:34 DHCP-IP dhcp: DHCPREQUEST for 10.1.1.1 from aa:00:00:00:00:00 (pc) via 10.1.1.2
Mar 22 11:15:34 DHCP-IP dhcp: DHCPREQUEST for 10.1.1.1 from aa:00:00:00:00:00 (pc) via 10.1.1.2
Mar 22 11:14:34 DHCP-IP dhcp: DHCPREQUEST for 10.1.1.1 from aa:00:00:00:00:00 (pc) via 10.1.1.2
Mar 22 11:12:34 DHCP-IP dhcp: DHCPREQUEST for 10.1.1.1 from aa:00:00:00:00:00 (pc) via 10.1.1.2
Mar 22 11:11:34 DHCP-IP dhcp: DHCPREQUEST for 10.1.1.1 from aa:00:00:00:00:00 (pc) via 10.1.1.2

使用此代码，我正在使用 grep IP 打印计数，但它显示重复 IP 的计数为 1，请指出我做错了什么

five_min='Mar 22 11:15:34' 
while IFS= read -r line; do
    if [[ "$five_min" < "$line" ]] 
    then
        echo "$line" | grep DHCPREQUEST  | awk -F  " " '{print $8 }' | uniq -c
    fi
done < file.txt

Answer 1

您在单行上运行命令，因此您得到 1 是有道理的。

具有以下test.txt:

Mar 22 11:20:34 DHCP-IP dhcp: DHCPREQUEST for 10.1.1.1 from aa:00:00:00:00:00 (pc) via 10.1.1.2
Mar 22 11:20:35 DHCP-IP dhcp: DHCPREQUEST for 10.1.1.1 from aa:00:00:00:00:00 (pc) via 10.1.1.2
Mar 22 11:20:36 DHCP-IP dhcp: DHCPREQUEST for 10.1.1.1 from aa:00:00:00:00:00 (pc) via 10.1.1.2

命令:

grep DHCPREQUEST test | awk '{print $8}' | uniq -c

打印:

3 10.1.1.1