Episode 81 — Gain Linux Security Visibility: Auditing, Logs, and Evidence of Misuse

This episode explains how Linux visibility is built from auditing, logging, and disciplined evidence collection, and why GSEC questions often hinge on recognizing which data source can confirm a suspected action. You’ll connect core log locations and common event types to investigation goals, including authentication events, privilege use, service starts, process execution clues, and network activity, while keeping focus on what you can prove rather than what you assume. We’ll discuss Linux auditing concepts at a practical level, including what makes an audit trail useful, how gaps occur when logging is disabled or rotated too aggressively, and why time synchronization and integrity protections matter for defensible timelines. Scenarios include a suspicious sudo event, a new account created outside change control, and a server that appears stable but shows evidence of repeated remote access attempts, with troubleshooting steps that separate configuration issues from malicious behavior. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.