The difference between single quotes and double quotes and backticks in linux ('' | ""|``)
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2023-08-06 18:41:12
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Single quotes: Regardless of whether there are variables or other expressions in the quotes, they are output as they are
Double quotes: The variables or functions inside the quotes will be parsed first in the output content
Backticks: command calls, equivalent to $(), backticks will execute shell commands first
Origin blog.csdn.net/m0_67849390/article/details/129009570
