Linux and Unix Fundamentals Questions

Practical command line and system administration knowledge for Linux and Unix style operating systems. Candidates should understand the file system hierarchy and common directories, file and directory permissions and ownership, user and group management, package management and software installation, service and startup management, system logging and basic log inspection, process management and signals including job control and background processes, and secure remote access using secure shell. Candidates should be proficient with common command line utilities for searching and text processing, input and output redirection and piping, and basic shell scripting constructs such as variables, conditionals, loops, and simple functions to automate routine tasks. Interview assessments may include hands on tasks and explanations such as navigating the file system, creating and managing files and directories, changing permissions and ownership, monitoring and terminating processes, inspecting logs to diagnose issues, managing services and packages, writing short scripts to automate workflows, and describing troubleshooting approaches for common system problems.