Bash脚本高级指南（Advanced Bash-Scripting Guide）是学习shell的经典指南，其中内容详细，实例丰富，且根据Bash的发展不断更新，此资源是Advanced Bash-Scripting Guide的最新版本6.6，更新于2012.11.27，是本人下载官方html版后制作而成，方便大家离线使用。

We often read (including in the book Advanced Bash-Scripting Guide by Mendel Cooper) that if we pass variable names as parameters to functions, they will be treated as string literals and cannot be ...