System Administration is the management and maintenance of a computer system, including hardware, software, and network infrastructure. System administrators are responsible for ensuring the system’s reliability, security, and performance. This involves tasks such as configuring and maintaining servers, installing and updating software, monitoring system logs and performance, providing technical support to users, and resolving issues.
An example of system administration is maintaining the IT infrastructure of a company. The system administrator is responsible for configuring and maintaining servers, managing network security to prevent cyber-attacks, keeping software up to date, and providing technical support to employees. They also monitor system logs to identify and resolve issues that may occur.
Server installation and configuration
User and Group Management
Security management and Monitoring systems
System and Application patch management
Storage management, Backup and Recovery
Network administration, Firewall Management
Resource Management and Performance tuning
Virtualization and cloud computing
Disaster Recovery and Business Continuity planning
Troubleshooting and problem resolution
Documentation and System logging
Compliance and regulatory requirements
Communication and coordination with other IT teams and departments
Budget and cost management
Continuous improvement of systems and processes.
What is the purpose of a firewall in a system administration context?
Answer: A firewall is used to control network traffic and prevent unauthorized access to a network or system.
What is the difference between a physical server and a virtual server?
Answer: A physical server is a physical, tangible machine, while a virtual server is a software-based emulation of a physical server that can be created, deleted, or dynamically allocated as needed.
How can you monitor system performance and identify bottlenecks on a server?
Answer: Various tools can be used to monitor system performance, including performance counters, system logs, and third-party monitoring software. Bottlenecks can be identified by examining resource utilization levels and response times.
What is RAID, and why is it important in system administration?
Answer: RAID (Redundant Array of Independent Disks) is a method of combining multiple hard drives into one logical unit to provide improved performance, protection against data loss, and increased storage capacity. It is essential in system administration as it helps ensure data availability and system uptime.
What are some common security measures that should be implemented on a server?
Answer: Common security measures that should be implemented on a server include using strong passwords, keeping operating systems and software up-to-date with security patches, implementing firewalls and anti-malware software, and restricting physical and remote access to the server.