Bash Series Part 2: A Developer's Guide to Shell Expansions Explained

A developer continuing a month-long Bash learning series has documented key concepts around shell expansions and special parameters. The article covers how Bash interprets scripts line by line without halting on errors unless flags like set -euo pipefail are explicitly set. It walks through several expansion types including brace, tilde, parameter, command substitution, and arithmetic expansion, with practical code examples for each. The author notes limitations such as Bash's lack of native floating-point arithmetic, requiring the bc utility for such calculations. The series is set to continue with topics including regex and tools like grep, sed, and awk.