使用sort&awk实现文件内容块排序

源文件为：

[root@luo5 wangxx]# cat -v luo.txt
J Luo
Soutth jfsa
Nanjing,china

Y Zhang
Victory University
Nejflja,Australia

D Hou
Beijing University
Melhouse,china

实现排序

[root@luo5 wangxx]# cat luo.txt |awk -v RS="" '{gsub(" ","@");print}' | sort | awk -v OFS=" " '{gsub("@"," ");print}'
D Hou
Beijing University
Melhouse,china
J Luo
Soutth jfsa
Nanjing,china
Y Zhang
Victory University
Nejflja,Australia