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Analyze suspicious Linux ELF executables through file inspection, runtime tracing, and reverse engineering. Identify malware behavior, network destinations, and persistence mechanisms, then organize findings and indicators for investigations involving servers, containers, or cloud infrastructure.

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• Triaging suspicious executables on Linux servers
• Investigating suspected cryptominers
• Analyzing malware found in containers

Diagnose Fedora Linux problems with a structured troubleshooting plan. Get commands for checking services, logs, and packages, followed by remediation, validation, and rollback steps that account for SELinux and firewalld where relevant.

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• Investigating a service that will not start
• Troubleshooting package-related problems
• Checking SELinux or firewall involvement

Inspect Linux scheduled tasks, services, shell profiles, shared library settings, and SSH keys for mechanisms that maintain attacker access. Correlate findings with audit logs to produce a timeline, risk scores, and remediation commands.

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• Investigating how attackers maintained access to a Linux host
• Hunting for suspicious scheduled tasks and services
• Building a timeline from persistence-related audit events

Acquire Linux memory with LiME and examine it using Volatility 3. Extract processes, network connections, command history, loaded kernel modules, and signs of injected code to support investigations of compromised Linux systems.

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• Acquiring memory from a compromised Linux system
• Comparing process lists to investigate hidden processes
• Reviewing command history and network connections

Investigate Linux intrusions using auditd records. Configure audit rules, search events with ausearch, summarize activity with aureport, reconstruct a timeline of suspicious actions, and forward logs to a central security monitoring system.

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• Investigating unauthorized access or privilege escalation
• Checking changes to critical files and SSH keys
• Reconstructing an incident timeline

Examine Linux authentication logs, shell history, SSH keys, scheduled tasks, and system settings to investigate a compromise. Help reconstruct activity, identify ways attackers maintain access, and document suspicious accounts, files, and configuration changes.

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• Investigating a potentially compromised Linux server
• Finding mechanisms that maintain unauthorized access
• Tracing user activity through logs and command history

Investigate how a limited Linux account could gain root, the system administrator's privileges. The skill guides checks of permissions, scheduled tasks, services, and known vulnerabilities, while outlining evidence defenders can monitor during authorized security assessments.

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• Assessing Linux privilege escalation paths
• Practicing privilege escalation in CTF challenges
• Reviewing sudo and scheduled task configurations

Diagnose Arch Linux problems by reviewing recent updates, service logs, and packages. Get a step-by-step investigation plan, ready-to-copy repair commands, verification steps, and guidance for rollback or cleanup.

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• Investigating problems after an Arch Linux update
• Diagnosing services that fail to start
• Planning repairs with verification and rollback steps

Investigate Linux kernel rootkits, malware that hides inside the operating system's core. Analyze memory dumps with Volatility3, compare system views, and run live scans to identify hidden modules, altered calls, and suspicious inconsistencies.

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• Investigate suspected Linux rootkit infections
• Find hidden kernel modules in memory dumps
• Compare module lists for signs of concealment

Trace SSH keys, tokens, and other credentials in Linux CTF environments. Connect each recovered artifact to the service that accepts it, then document the resulting privileges or movement to another host.

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• Trace where recovered SSH keys and tokens are accepted
• Document privilege gains through sockets or sudo
• Explain movement between Linux challenge hosts

Guide desktop actions on a connected Linux computer using accessibility information that identifies buttons and fields. It covers checking keyboard focus, verifying results with screenshots, and handling limitations in XWayland apps and remote desktop viewers.

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• Operate Linux buttons and fields using accessibility information
• Verify the input window before typing
• Work with remote desktop viewers

Diagnose CentOS problems using service status, logs, and RHEL-compatible commands. Get remediation commands, checks after major changes, and rollback steps, with attention to SELinux access controls and the firewalld firewall where relevant.

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• Investigating a service that will not start
• Diagnosing package installation or update failures
• Checking SELinux or firewall restrictions

Build and manage Linux containers on Apple silicon Macs with Apple's container CLI. Run each container in its own lightweight virtual machine, and get guidance on images, networking, storage, and translating familiar Docker workflows to this tool.

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• Building container images from a Dockerfile
• Running Linux containers on an Apple silicon Mac
• Managing persistent volumes and container networks

Use Bash on macOS or Linux for file searches, log inspection, text processing, and process checks. Apply command chaining, pipes that pass text between commands, environment variables, and error handling when writing scripts.

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• Finding files and searching their contents
• Inspecting logs, processes, and occupied ports
• Extracting and replacing text

Build C++ applications for custom Zoom video sessions on Linux, including bots that run without a display. Get guidance on capturing and supplying raw audio and video, connecting Qt or GTK interfaces, and configuring Docker environments.

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• Build a Zoom video session bot that runs in Docker
• Capture and process raw audio and video
• Supply custom media through a virtual camera or microphone

Review how evidence can be altered during authorized security exercises on Windows and Linux. Covers logs, timestamps, memory, disk records, and network traces, alongside the signs defenders use to detect manipulation.

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• Planning authorized evidence manipulation tests
• Reviewing Windows and Linux forensic artifacts
• Checking detection coverage for altered evidence

Investigate Debian Linux issues through service checks, logs, and package tools. Receive repair commands, verification steps, and rollback guidance, with attention to AppArmor security restrictions or firewall settings when relevant.

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• Investigating Debian service or package problems
• Checking whether security restrictions affect an issue
• Preparing repair, verification, and rollback steps

Helps manage and troubleshoot Linux, macOS, and Windows systems. Guides checks of CPU, memory, disks, networks, and logs, then supports service configuration and security hardening with explanations suited to the operating system.

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• Investigating slow systems and resource usage
• Finding causes of low disk space
• Checking failed services and their logs

Helps configure and troubleshoot Linux networks, including firewalls, routing, and DNS, which translates domain names into addresses. Covers traffic capture, isolated test networks, WireGuard VPN setup, and TCP tuning across physical servers, virtual machines, and containers.

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• Investigating connectivity and DNS failures
• Reviewing firewall rules and port forwarding
• Configuring routes based on traffic source

Plan persistence testing for authorized Windows and Linux security exercises, examining how access can survive logons or restarts. The skill compares mechanisms by privilege level and environment, with validation steps, detection indicators, and cleanup considerations.

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• Planning persistence tests for authorized exercises
• Comparing methods by operating system and privilege
• Reviewing detection indicators for persistence

在Parallels虚拟机中验证OpenClaw的安装、初始设置和更新，检查macOS、Windows及Linux的基本运行情况，并通过日志定位失败原因。

• 检查三个操作系统上的全新安装
• 验证OpenClaw更新流程
• 从现有快照恢复并重新验证

Diagnose network errors and intermittent connections on routers, switches, and Linux hosts. Compare both ends of a link and changes in error counts to distinguish cable faults, congestion, and mismatched speed or communication settings.

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• Investigating packet loss and intermittent connections
• Checking a switch port with rising CRC errors
• Comparing settings at both ends of a network link

Create and review Docker development environments, including service networking, persistent storage, and security settings. Also guides isolated testing of command-line installers on Linux, while identifying checks that require native macOS or Windows environments.

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• Set up a local app, database, and Redis stack
• Review container networking and persistent storage
• Harden Dockerfile and Compose security settings

Guide reviews of Linux Kernel patches for memory safety, Terraform plans for costly resource changes, and Kubernetes configurations for restricted permissions. A separately installed tool and configured AI model produce advisory findings and candidate manifests for validation.

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• Review Linux Kernel patches for memory safety issues
• Check Terraform plans for potentially costly resource changes
• Draft Kubernetes permission settings from security requirements