How to store specific data on certain lines of an empty file using bash

Question

例如，我想使用 bash 脚本将一些特定数据（ var1=23 、 var2=true 、 var3=alpha 、 var4=55 ）存储到文件的后续行中

line_1 -> var3, line_2 -> var4, line_3 -> var1, line_4 -> var2.

Answer 1

This should do it

printf '%s\n' "$var3" "$var4" "$var1" "$var2" > output.file

The printf command will re-use the format string until all the given data is used up.

If that is not sufficient, then please update your question to provide more clear requirements.