從文本文件中獲取字符串并寫到另一個文件中

yinyuemi

$ echo "a,abc,cbd,1
a,abc,cbd,4
a,abc,cbd,3
a,abc,cbd,2
a,cde,efg,3
a,cde,efg,4
a,cde,efg,5" |awk 'BEGIN{FS=","} { print ++A[$2]","$0 }' | sort -nr | awk 'BEGIN{FS=","} {if(++a[$3]==1) print $2","$3","$4","$5 }'