1.以下哪个命令是查看日志中访问次数最多的前10个IP?
A.awk {print $4} default-access_log |cut -c 14-18|sort|uniq -c|sort -nr|head
B.cat access_log |cut -d -f 1 |sort |uniq -c | sort -nr | awk {print $0 } | head -n 10 |less
C.cat default-access_log | grep 218.19.140.242(换成指定ip) | awk {print $1\t$8} | sort | uniq -c | sort -nr | less
D.cat default-as_log | grep 10/Dec/2018(换成当前时间) | awk {print $2} | sort | uniq -c | sort -nr