如何逐行一致地合并两个文件 [英] how to merge two files consistently line by line

问题描述

我有两个文件 (file1.txt & file2.txt )，文件只是示例.

I have two files (file1.txt & file2.txt ) , files are only examples .

如何合并两个文件，以创建文件 - merge_files.txt 示例 3

How to merge the two files , in order to create the file - merge_files.txt as example 3

我现在在写 ksh 脚本，所以合并可以用 ksh、awk、sed、perl 一个 liner ...等来完成

I writing now ksh script , so merge can be done with ksh,awk,sed,perl one liner ...etc

背景 - 为什么我需要合并文件:我的目标是将旧文件(存在于第一个字段中)重命名为新文件 (存在于第二个字段中) ,

Background - why I need to merge the files : my target is to rename the OLD file (exist in first field) to NEW file (exist in second field) ,

示例 1

more file1.txt

/etc/port1-192.9.200.1-255.555.255.0
/etc/port2-192.9.200.1-255.555.255.0
/etc/port3-192.9.200.1-255.555.255.0
/etc/port4-192.9.200.1-255.555.255.0
/etc/port5-192.9.200.1-255.555.255.0
.
.
.
.

示例 2

more file2.txt

/etc/port1-192.90.2.1-255.555.0.0
/etc/port2-192.90.2.1-255.555.0.0
/etc/port3-192.90.2.1-255.555.0.0
/etc/port4-192.90.2.1-255.555.0.0
/etc/port5-192.90.2.1-255.555.0.0
.
.
.
.

示例 3

 more merge_files.txt



 /etc/port1-192.9.200.1-255.555.255.0  /etc/port1-192.90.2.1-255.555.0.0
 /etc/port2-192.9.200.1-255.555.255.0  /etc/port2-192.90.2.1-255.555.0.0
 /etc/port3-192.9.200.1-255.555.255.0  /etc/port3-192.90.2.1-255.555.0.0
 /etc/port4-192.9.200.1-255.555.255.0  /etc/port4-192.90.2.1-255.555.0.0
 /etc/port5-192.9.200.1-255.555.255.0  /etc/port5-192.90.2.1-255.555.0.0
 .
 .
 .
 .
 .

example4(merge_files.txt 结构)

example4 (merge_files.txt structure)

 first field                           second field

 OLD file                              NEW file

推荐答案

您可以使用 paste 并排格式化文件:

You can use paste to format the files side by side:

$ paste -d" " file1.txt file2.txt
/etc/port1-192.9.200.1-255.555.255.0 /etc/port1-192.90.2.1-255.555.0.0
/etc/port2-192.9.200.1-255.555.255.0 /etc/port2-192.90.2.1-255.555.0.0
/etc/port3-192.9.200.1-255.555.255.0 /etc/port3-192.90.2.1-255.555.0.0
/etc/port4-192.9.200.1-255.555.255.0 /etc/port4-192.90.2.1-255.555.0.0
/etc/port5-192.9.200.1-255.555.255.0 /etc/port5-192.90.2.1-255.555.0.0

例如:

$ paste -d" " file1.txt file2.txt | while read from to; do echo mv "${from}" "${to}"; done
mv /etc/port1-192.9.200.1-255.555.255.0 /etc/port1-192.90.2.1-255.555.0.0
mv /etc/port2-192.9.200.1-255.555.255.0 /etc/port2-192.90.2.1-255.555.0.0
mv /etc/port3-192.9.200.1-255.555.255.0 /etc/port3-192.90.2.1-255.555.0.0
mv /etc/port4-192.9.200.1-255.555.255.0 /etc/port4-192.90.2.1-255.555.0.0
mv /etc/port5-192.9.200.1-255.555.255.0 /etc/port5-192.90.2.1-255.555.0.0

当然你会想要进行一些安全检查([ -f "${from}" ], ...).

Of course you would want to throw in some safety checks ([ -f "${from}" ], ...).

免责声明:仅当文件名中没有空格时才有效.

Disclaimer: Works only if there are no spaces in your filenames.

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