**提取出第二列并过滤重复，且列出重复行数** ``` awk -F " " '{print $2}' cnyunwei.log | sort -r | uniq -c | grep -v "1 " #或者 awk -F " " '{print $2}' cnyunwei.log | sort -r | uniq -c | awk '{if($1>1){print $0}}' ``` ``` #!/bin/sh SOCFILENAME=cnyunwei.log FILENAME=temp.log if [ -e $FILENAME ]; then rm -rf $FILENAME fi awk -F " " '{print $2}' $SOCFILENAME | sort -r | uniq -c | grep -v "1 " | awk '{print $2}' >> $FILENAME while read LINE do grep $LINE $SOCFILENAME done < $FILENAME exit 0 ```