为什么在 Bash 中 echo /$USER 和 echo '$USER' 输出相同？
When you're learning Linux essentials, you might encounter situations where certain commands return similar or even identical outputs despite differing syntax. A popular example involves the use...
学习Linux时，命令echo /$USER会将$USER替换为用户名，而echo '$USER'则输出字符串$USER。理解环境变量及其用法有助于提升脚本编写能力。
