一、shell上下两行
1.file
cat file.txt
host1 192.168.0.1 host2 192.168.0.2 host3 192.168.0.3 host4 192.168.0.4 host5 192.168.0.5
2.sed
sed 'N;s/\n/ :/' file
# cat file.txt | sed 'N;s/\n/ :/' host1 :192.168.0.1 host2 :192.168.0.2 host3 :192.168.0.3 host4 :192.168.0.4 host5 :192.168.0.5
二、sed多行
N (next)多行操作命令，文本前后两行合并为一行
# cat file.txt host11 192.168.0.1 host222 192.168.0.2 host3 192.168.0.3 host44 192.168.0.4 host555 192.168.0.5
# sed 'N;s/\n/ :/' file.txt host11 :192.168.0.1 host222 :192.168.0.2 host3 :192.168.0.3 host44 :192.168.0.4 host555 :192.168.0.5
使用“制表符”\t对齐边缘
# sed 'N;s/\n/ \t/' file.txt host11 192.168.0.1 host222 192.168.0.2 host3 192.168.0.3 host44 192.168.0.4 host555 192.168.0.5
原文地址：https://blog.csdn.net/ichen820/article/details/129525304