Bash DBMS — Database Management System using Shell Scripting

Built a fully functional Database Management System (DBMS) from scratch using pure Bash scripting, with no external database engine.

The system simulates real database operations using the Linux file system — each database is a directory and each table is a file.

Features implemented:

- Create, list, connect to, and drop databases

- Create, list, and drop tables

- Insert rows with data validation

- Show/query table data

- Delete specific rows

- Update specific cells

- Menu-driven CLI interface for easy navigation

- Header-based schema with column names and types (integer, string)

- Data stored in plain text files with structured format

Technical highlights:

- Pure Bash scripting with no frameworks or libraries

- File-based storage system using Linux directories and files

- Text processing and parsing using awk

- Modular design — each operation is a separate script

- Input validation and error handling

- chmod-based permission management