linux中实现将上下两行文本合并为一行

 

1、测试数据

root@DESKTOP-1N42TVH:/home/test3# ls
a.txt
root@DESKTOP-1N42TVH:/home/test3# cat a.txt   ## 测试数据
aaaa
bbbb
cccc
dddd
eeee
ffff

 

2、sed实现

root@DESKTOP-1N42TVH:/home/test3# ls
a.txt
root@DESKTOP-1N42TVH:/home/test3# cat a.txt
aaaa
bbbb
cccc
dddd
eeee
ffff
root@DESKTOP-1N42TVH:/home/test3# sed -n '{N; s/\n/ /p}' a.txt     ## sed实现
aaaa bbbb
cccc dddd
eeee ffff

 

root@DESKTOP-1N42TVH:/home/test3# ls
a.txt
root@DESKTOP-1N42TVH:/home/test3# cat a.txt
aaaa
bbbb
cccc
dddd
eeee
ffff
root@DESKTOP-1N42TVH:/home/test3# sed 'N; s/\n/ /' a.txt
aaaa bbbb
cccc dddd
eeee ffff

 

3、xargs实现

root@DESKTOP-1N42TVH:/home/test3# ls
a.txt
root@DESKTOP-1N42TVH:/home/test3# cat a.txt
aaaa
bbbb
cccc
dddd
eeee
ffff
root@DESKTOP-1N42TVH:/home/test3# cat a.txt | xargs -n 2
aaaa bbbb
cccc dddd
eeee ffff

 

4、awk实现

root@DESKTOP-1N42TVH:/home/test3# ls
a.txt
root@DESKTOP-1N42TVH:/home/test3# cat a.txt
aaaa
bbbb
cccc
dddd
eeee
ffff
root@DESKTOP-1N42TVH:/home/test3# awk '{if(NR %2 == 0) {print $0} else {printf("%s ", $0)}}' a.txt
aaaa bbbb
cccc dddd
eeee ffff

 

root@DESKTOP-1N42TVH:/home/test3# ls
a.txt
root@DESKTOP-1N42TVH:/home/test3# cat a.txt
aaaa
bbbb
cccc
dddd
eeee
ffff
root@DESKTOP-1N42TVH:/home/test3# awk '{tmp = $0; getline; print tmp"\t"$0}' a.txt
aaaa    bbbb
cccc    dddd
eeee    ffff