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
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