Liangxu Linux

Sep 17, 2021 · Fundamentals

Mastering Shell Special Parameters: $*, $@, $#, $$, and $! Explained with Real Examples

This article explains the behavior of key Bash special parameters—$*, $@, $#, $$, and $!—through three practical scripts that demonstrate argument expansion, counting, arithmetic operations, and process ID retrieval, highlighting the differences and typical use cases.