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Latest 2025 Updated Linux Foundation Certified System Administrator Questions and Answers

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LFCS Exam Format | LFCS Course Contents | LFCS Course Outline | LFCS Exam Syllabus | LFCS Exam Objectives

Overview


The Linux Foundation Certified System Administrator (LFCS) certification is ideal for candidates early in their Linux system administration or open source career. The exam consists of performance-based items that simulate on-the-job tasks and scenarios faced by sysadmins in the real world. Obtaining certification allows individuals to validate their skills to prospective employers, which is particularly valuable if you have little on-the-job experience.





Domains & Competencies


The Linux Foundation worked with industry experts and the Linux kernel community to identify the core domains and the critical skills, knowledge and competencies applicable to each certification. Performance-based exams were then developed based on the competencies that were identified.





- Essential Commands – 25%


- Operation of Running Systems – 20%


- User and Group Management – 10%


- Networking – 12%


- Service Configuration – 20%


- Storage Management – 13%





Essential Commands – 25%


- Log into local & remote graphical and text mode consoles


- Search for files


- Evaluate and compare the basic file system features and options


- Compare and manipulate file content


- Use input-output redirection (e.g. >, >>, |, 2>)


- Analyze text using basic regular expressions


- Archive, backup, compress, unpack, and uncompress files


- Create, delete, copy, and move files and directories


- Create and manage hard and soft links


- List, set, and change standard file permissions


- Read, and use system documentation


- Manage access to the root account





Operation of Running Systems – 20%


- Boot, reboot, and shut down a system safely


- Boot or change system into different operating modes


- Install, configure and troubleshoot bootloaders


- Diagnose and manage processes


- Locate and analyze system log files


- Schedule tasks to run at a set date and time


- Verify completion of scheduled jobs


- Update software to provide required functionality and security


- Verify the integrity and availability of resources


- Verify the integrity and availability of key processes


- Change kernel runtime parameters, persistent and non-persistent


- Use scripting to automate system maintenance tasks


- Manage the startup process and services (In Services Configuration)


- List and identify SELinux/AppArmor file and process contexts


- Manage Software


- Identify the component of a Linux distribution that a file belongs to





User and Group Management – 10%


- Create, delete, and modify local user accounts


- Create, delete, and modify local groups and group memberships


- Manage system-wide environment profiles


- Manage template user environment


- Configure user resource limits


- Manage user privileges


- Configure PAM





Networking – 12%


- Configure networking and hostname resolution statically or dynamically


- Configure network services to start automatically at boot


- Implement packet filtering


- Start, stop, and check the status of network services


- Statically route IP traffic


- Synchronize time using other network peers





Service Configuration – 20%


- Configure a caching DNS server


- Maintain a DNS zone


- Configure email aliases


- Configure SSH servers and clients


- Restrict access to the HTTP proxy server


- Configure an IMAP and IMAPS service


- Query and modify the behavior of system services at various operating modes


- Configure an HTTP server


- Configure HTTP server log files


- Configure a database server


- Restrict access to a web page


- Manage and configure containers


- Manage and configure Virtual Machines





Storage Management – 13%


- List, create, delete, and modify physical storage partitions


- Manage and configure LVM storage


- Create and configure encrypted storage


- Configure systems to mount file systems at or during boot


- Configure and manage swap space


- Create and manage RAID devices


- Configure systems to mount file systems on demand


- Create, manage and diagnose advanced file system permissions


- Setup user and group disk quotas for filesystems


- Create and configure file systems

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