The upper and lower lines of the shell are merged into one line

List of articles

shell

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Preface

sed

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One 、shell Two lines up and down

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

Two 、sed Multiple lines

• N (next) Multiline operation command , The two lines before and after the text are merged into one line

# 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

• Use “ tabs ”\t Align edges

# 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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Reference resources

1. shell The two lines merge into one line
2. sed Multiline command
3. sed s Replace script command
4. Use “ tabs ” Align edges