Server Specialist Singapore
A system administrator Server Specialist Singapore , or sysadmin, is a person who is responsible for the upkeep, configuration, and reliable operation of computer systems; especially multi-user computers, such as servers. The system administrator seeks to ensure that the uptime, performance, resources, and security of the computers they manage meet the needs of the users, without exceeding a set budget when doing so.
To meet these needs, a Server Specialist Singapore system administrator may acquire, install, or upgrade computer components and software; provide routine automation; maintain security policies; troubleshoot; train or supervise staff; or offer technical support for projects.
Many organizations staff other jobs related to system administration. In a larger company, these may all be separate positions within a computer support or Information Services (IS) department. In a smaller group they may be shared by a few sysadmins, or even a single person.
A database administrator (DBA) maintains a database system, and is responsible for the integrity of the data and the efficiency and performance of the system.
A Server Specialist Singapore network administrator maintains network infrastructure such as switches and routers, and diagnoses problems with these or with the behavior of network-attached computers.
A security administrator is a specialist in computer and network security, including the administration of security devices such as firewalls, as well as consulting on general security measures.
A web administrator Server Specialist Singapore maintains web server services (such as Apache or IIS) that allow for internal or external access to web sites. Tasks include managing multiple sites, administering security, and configuring necessary components and software. Responsibilities may also include software change management.
A computer Server Specialist Singapore operator performs routine maintenance and upkeep, such as changing backup tapes or replacing failed drives in a redundant array of independent disks (RAID). Such tasks usually require physical presence in the room with the computer, and while less skilled than sysadmin tasks, may require a similar level of trust, since the operator has access to possibly sensitive data.
A system administrator’s responsibilities might include:
Analyzing system logs and identifying potential issues with computer systems.
Applying operating system updates, patches, and configuration changes.
Installing and configuring new hardware and software.
Adding, removing, or updating user account information, resetting passwords, etc.
Answering technical queries and assisting users.
Responsibility for security.
Responsibility for documenting the configuration of the system.
Troubleshooting any reported problems.
System performance tuning.
Ensuring that the network infrastructure is up and running.
Configuring, adding, and deleting file systems.
Ensuring parity between dev, test and production environments.
Plan and manage the machine room Server Specialist Singapore environment
In larger organizations, some of the tasks above may be divided among different system administrators or members of different organizational groups. For example, a dedicated individual(s) may apply all system upgrades, a Quality Assurance (QA) team may perform testing and validation, and one or more technical writers may be responsible for all technical documentation written for a company. System administrators, in larger organizations, tend not to be systems architects, systems engineers, or systems designers.
Essential Linux Administration (Cengage Press): A Comprehensive Guide for Beginners, 2011 by Chuck Easttom
Essential System Administration (O’Reilly), 3rd Edition, 2001, by Æleen Frisch
The Practice of System and Server Specialist Singapore Network Administration (Addison-Wesley), 2nd Edition Jul. 5, 2007, by Thomas A. Limoncelli, Christine Hogan and Strata R. Chalup
The Practice of System and Network Administration, The: Volume 1: DevOps and other Best Practices for Enterprise IT (Addison-Wesley), 3rd Edition Nov. 4, 2016, by Thomas A. Limoncelli, Christine Hogan, Strata R. Chalup
The Practice of Cloud System Administration: Designing and Operating Large Distributed Systems, Volume 2 (Addison-Wesley), Sep. 2, 2014, by Thomas A. Limoncelli, Christine Hogan, Strata R. Chalup
Principles of Network and System Administration (J. Wiley & Sons), 2000,2003(2ed), by Mark Burgess
Time Management for System Administrators (O’Reilly), 2005, by Thomas A. Limoncelli
UNIX and Linux System Administration Handbook (Prentice Hall), 5th Edition, Aug. 8, 2017, by Evi Nemeth, Garth Snyder, Trent R. Hein, Ben Whaley, Dan Mackin
Application service management (ASM) is an emerging discipline within systems management that focuses on monitoring and managing the performance and quality of service of business transactions.
ASM can be defined as a well-defined process and use of related tools to detect, diagnose, remedy and report the service quality of complex business transactions to ensure that they meet or exceed end-users’ Performance measurements relate to how fast transactions are completed or information is delivered to the end user by the aggregate of applications, operating systems, hypervisors (if applicable), hardware platforms, and network interconnects. The critical components of ASM include application discovery & mapping, application “health” measurement & management, transaction-level visibility, and incident-related triage.
ASM is related to application performance management (APM), but serves as a more pragmatic, “top-down” approach that focuses on delivery of business services. In strict definition, ASM differs from APM in two critical ways.
APM focuses exclusively on the performance of an instance of an application, ignoring the complex set of interdependencies that may exist behind that application in the data center. ASM specifically mandates that each application or infrastructure software, operating system, hardware platform, and transactional “hop” be discretely measurable, even if that measurement is inferential. This is critical to ASM’s requirement to be able to isolate the source of service-impacting conditions.
APM often requires instrumentation of the application for management and measurability. ASM advocates an application-centric approach, asserting that the application and operating system have comprehensive visibility of an application’s transactions, dependencies, whether on-machine or off-machine, as well as the operating system itself and the hardware platform it is running on. Further, an in-context agent can also infer network latencies with a high degree of accuracy, and with a lesser degree of accuracy when the transaction occurs between instrumented and non-instrumented platforms.
Application service management extends the concepts of end-user experience management and real user monitoring in that measuring the experience of real users is a critical data point. However, ASM also requires the ability to quickly isolate the root cause of those slow-downs, thereby expanding the scope of real user monitoring/management.
The use of application service management is common for complex, multi-tier transactional applications. Further, the introduction of service-oriented architecture and microservices approaches together with hypervisor-based virtualization technologies have proven a catalyst for the adoption of ASM technologies, as complex applications are disproportionately impacted by the introduction of hypervisors into an existing environment A study by the Aberdeen Group indicates that most deployments of virtualization technologies are hampered by their impact on complex transactional applications.
How to Become a System Administrator: Five Steps
- Earn a bachelor’s degree and build tech skills. You might sigh, exclaiming, “higher education in IT is outdated!” …
- Take extra courses to become a system administrator. …
- Develop strong interpersonal skills. …
- Get a job. …
- Constantly refresh your knowledge.
- Microsoft Certified Solutions Expert (MCSE)
- Red Hat: RHCSA and RHCE.
- Linux Professional Institute (LPI): LPIC System Administrator.
- CompTIA Server+
- VMware Certified Professional – Data Center Virtualization (VCP-DCV)
- ServiceNow Certified System Administrator.