[cloud@cs_ctech ~]$ cat > main
1
<br>
2<br>
4<br><br>
5
[cloud@cs_ctech ~]$ vi -c '%s/<br>/\r/g' main
1


2

4


5
###End###








참조

http://kldp.org/KoreanDoc/html/Vim-KLDP/edit-11.html