Question

sed 匹配某一行的上一行，然后删除这行最后的换行符。

原始文件
"1","211.211.222.0","学习 （51/1）","21128","2016","60"^M
"2","211.111.122.0","学习 （9/4）","22138","2016","60"^M
"4","111.211.333.0","学习 （1/2）
","21515","2016/5/12 0:00:09","60"^M
"8","219.235.141.0","学习 （46/64）","21612","2016","60"^M
"5","211.211.222.0","听课","3202","20169","60"^M
"9","211.211.222.0","听课","4198","2016","60"^M
"7","211.211.222.0","听课","2395","2016","60"^M
"12","111.211.123.0","学习 （9/2）
","111","2016","60"^M
识别","这行的上一行，删除换行符。两行合并
要改成这样
"1","211.211.222.0","学习 （51/1）","21128","2016","60"^M
"2","211.111.122.0","学习 （9/4）","22138","2016","60"^M
"4","111.211.333.0","学习 （1/2）","21515","2016","60"^M
"8","219.235.141.0","学习 （46/64）","21612","2016","60"^M
"5","211.211.222.0","听课","3202","2016","60"^M
"9","211.211.222.0","听课","4198","2016","60"^M
"7","211.211.222.0","听课","2395","2016","60"^M
"12","111.211.123.0","学习 （9/2）","111","2016","60"^M

Answer 1

sed '{
N
s/\(.*\)\n\(",".*\)/\1\2/
t merge
P
D}
:merge 
p
d' 原始文件名 > 修改后的文件名

Answer 2

http://blog.uouo123.com/post/788.html

追问

这个。用我这个例子写不了啊。 ","这行的上一行没有一样的词。