sed paste

1cpuer

# [2017-11-30 16:08:54] root--bash:/home/soio/1bs
# cat test
a
b
c
d
e
12
11



# [2017-11-30 16:09:54] root--bash:/home/soio/1bs
# sed '=' test | sed 'N;s/\n/ /'
1 a
2 b
3 c
4 d
5 e
6 12
7 11
8

# sed '=;N;s/\n/ /' test ##### 如何 paste