System Commands BPT 2 Solutions

💻 System Commands BPT 2 Solutions (Week 1&2 Concepts)

Version: v1_t12025 —
Complete executable shell script solutions for file parsing, conditional logic, and logging using sed, grep, and shell flow control.

This downloadable PDF bundle provides complete, concise solutions (shell commands/scripts) for the System Commands BPT 2 problems. The assignment tests the ability to use advanced text processing utilities and implement fundamental shell logic.

Core Programming Tasks (Problem 1 – 4)

The solutions provide single-line or short shell scripts required to perform specific text and system checks:

• Problem 1 (HTML/Text Parsing): Provide the sed command that uses regular expressions to efficiently extract two pieces of information (country name and capital) from an HTML-like string and print them on separate lines. This requires complex capture groups and back-references.
• Problem 2 (Conditional File Check): Write a script snippet using conditional checks (-d) for directory existence and logical operators (||, &&) to create a file named default_config if either the directory global_config or local_config exists.
• Problem 3 (Logging and grep): Write a shell block (if statement) that uses grep -q for silent searching of a specific error string ("database_error") in app.log. If the error is found, the script must append a timestamped log message (using date) to an error_report.log file.
• Problem 4 (Regular Expression Filtering): Provide the grep command using the extended regular expression flag (-E) to filter lines that end with a comma followed by one or more digits.

File Format:

• ☑ Shell Commands: Solutions provided as executable single-line commands or short scripts.