Security

Security is a critical component of managing Linux services and listed below are some of the objectives you should know to pass XK0-004 test:

• Implementing and configuring Linux firewalls with ACL;
• Implementing logging services and various Linux log files;
• Configuring and implementing the right authentication and access methods like PAM, and using Linux commands such as TTY, PTY, and SSH.
• File backup, restoration, and compression.
• Applying or acquiring fitting user or group ownership and context-based permissions;
• Summarizing the security best practices commonly used within a Linux environment and explaining their peculiarities;

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Systems Operation and Maintenance

Here, students should be well conversant with the following concepts:

• Managing services like Systemd & InitV;
• Scheduling and automating jobs;
• Managing users and groups including query users, disk quotas, and profiles.
• Conducting software installations, updates, removals, and configurations;
• Explaining the role of Linux devices;
• Summarizing and explaining server roles like Linux;
• Creating, modifying, and redirecting files;
• Comparing and contrasting the graphical user interfaces of a Linux system.

Reference: https://certification.comptia.org/certifications/linux#overview

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