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#input-validation

2 posts

Shell & TerminalDeep Dive October 3, 2026 8 min read

Bash Regular Expressions: Safe and Precise Matching with =~

Use Bash's POSIX extended regular-expression operator, capture groups, quoting rules, and explicit no-match versus invalid-pattern handling.

#bash#shell#regex

Shell & TerminalDeep Dive October 3, 2026 8 min read

Use Bash select for small interactive menus while handling REPLY, invalid choices, redirected input, repeated actions, and EOF explicitly.

#bash#select#interactive-shell