Systems Administration Scripting Logpos 433 Version 11

Systems Administration Scripting Logpos433 Version 11university Of Ph

Complete a series of scripting and process management tasks on a Unix/Linux system, including creating, modifying permissions, running scripts, handling signals, managing background jobs, and scheduling future execution using the at command. Keep detailed logs of each step, including commands used, outputs, and any errors encountered, and submit this log to your instructor.

Paper For Above instruction

Systems administration scripting is a core component of managing Unix and Linux environments, requiring proficiency in creating, modifying, and controlling scripts and processes. This assignment guides students through essential tasks such as script creation, permission setting, execution, signal handling, job management, and scheduling, fostering practical skills crucial for effective system administration.

Initially, students are instructed to create a new script file named "week4prog1[name].scr" within the same directory used previously. This step emphasizes familiarity with file creation and naming conventions. The next step involves modifying the file permissions to grant execute rights to the user, group, and others, ensuring the script can be run without permission issues. This aligns with standard permission management practices in Unix/Linux systems, reinforcing security and accessibility considerations.

The core task is to write and execute a Bash script that uses a loop to iterate ten times, printing messages and pausing briefly between iterations. This script begins with a shebang line to specify the interpreter, initializes a counter, and employs a while loop to control the flow. The loop prints the current count, pauses execution momentarily with the sleep command, and then increments the counter. After completing the loop, the script outputs a termination message. This segment tests scripting fundamentals, including variable management and control structures.

Students are then challenged to modify the script to handle signals, specifically SIGINT (interrupt) and SIGTERM (termination). This involves adding trap commands that execute custom routines when these signals are received, which is vital for graceful shutdowns and resource cleanup. The updated script should be saved and executed in the background, simulating real-world scenarios where system processes run concurrently and need to be managed asynchronously.

To manage these background processes, students must use the jobs command to display the list of active jobs, identify the specific process ID (PID), and then terminate the process using the kill command. This exercise solidifies understanding of process management, PIDs, and the importance of controlled process termination. Additionally, students are required to observe whether the trap messages designated in the script are displayed upon the process's termination, confirming signal handling effectiveness.

The final component involves scheduling the script to run at a future time using the at command. Students should submit the scheduled job and wait for its execution, verifying that the script runs correctly as planned. This task emphasizes familiarity with job scheduling tools, essential for automating system tasks and maintaining efficient workflows in system administration.

Throughout the assignment, maintaining a detailed log of each step, including commands entered, outputs received, and any errors encountered, is crucial. This documentation demonstrates understanding, troubleshooting skills, and the ability to manage processes effectively, all vital competencies for system administrators operating in complex, multi-user environments.

References

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