cyber-defender-man

Course 3: Linux and SQL

Key Skills

• Navigating file systems and modifying permissions with chmod
• Reading and interpreting Linux permission strings
• Writing SQL queries for log filtering and investigation

Highlight: Linux Permissions

In a hands-on exercise, I audited file permissions, such as removing unauthorized write access from hidden files to ensure the principle of least privilege.

Highlight: SQL Filtering

I wrote SQL queries to filter failed login attempts, isolate events on specific dates, and exclude some geolocations to support incident triage.