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Linux System / Network Administration

A system administrator, IT systems administrator, systems administrator, or sysadmin is a person employed to maintain and operate a computer system and/or network. System administrators may be members of an information technology (IT) or Electronics and Communication Engineering department.
The duties of a system administrator are wide-ranging, and vary widely from one organization to another. Sysadmins are usually charged with installing, supporting and maintaining servers or other computer systems, and planning for and responding to service outages and other problems. Other duties may include scripting or light programming, project management for systems-related projects, supervising or training computer operators, and being the consultant for computer problems beyond the knowledge of technical support staff. To perform his or her job well, a system administrator must demonstrate a blend of technical skills and responsibility.
A system administrator's responsibilities might include:
  • Analyzing system logs and identifying potential issues with computer systems.
  • Introducing and integrating new technologies into existing data center environments.
  • Performing routine audits of systems and software.
  • Performing backups.
  • Applying operating system updates, patches, and configuration changes.
  • Installing and configuring new hardware and software.
  • Adding, removing, or updating user account information, resetting access and permissions, etc.
  • Answering technical queries and dealing with often frustrated 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.
In larger organizations, some tasks listed 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.
In smaller organizations, the system administrator can also perform any number of duties elsewhere associated with other fields:
  • Technical support
  • Database administrator (DBA)
  • Network administrator/analyst/specialist
  • Application analyst
  • Security administrator
  • Programmer
System administrators, in larger organizations, tend not to be system architects, system engineers, or system designers. However, like many roles in this field, demarcations between system administration and other technical roles often are not well defined in smaller organizations. Even in larger organizations, senior system administrators often have skills in these other areas as a result of their working experience.
In smaller organizations, IT/computing specialties are less often discerned in detail, and the term system administrator is used in a rather generic way — they are the people who know how the computer systems work and can respond when something fails.
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. There are various roles for a person having knowledge of Linux based systems and networks, like:
  • 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 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 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.
  • Technical support staff respond to individual users' difficulties with computer systems, provide instructions and sometimes training, and diagnose and solve common problems.
  • A computer operator performs routine maintenance and upkeep, such as changing backup tapes or replacing failed drives in a RAID. Such tasks usually require physical presence in the room with the computer; and while less skilled than sysadmin tasks require a similar level of trust, since the operator has access to possibly sensitive data.
  • A postmaster is the administrator of a mail server.
In some organizations, a person may begin as a member of technical support staff or a computer operator, then gain experience on the job to be promoted to a sysadmin position.
Training Objective:
This course is designed to ensure that students of Engineering College with academic capabilities will have the skill set needed to deal with the challenges involved in real-world Linux System Administration to meet the needs of industries both today and in the future.
The course considers System Administration, Maintenance, Upreadation etc. which can help to ensure that Linux based networked systems and databases are reliable.
The course is taught mainly using the LInux based network of computers.
A prior knowledge of a basic Linux commands, general understanding about operating system concepts is assumed.
  • The Duration of training would be 12 weeks.
  • There would be 48 Classroom Sessions of 2 hours each.
  • There would be 48 Lab of 4 hours each
  • After the Training is over You should be able to:
    • do User administration (setup and maintaining account)
    • Maintain systems
    • Verify that peripherals are working properly
    • Quickly arrange repair for hardware in occasion of hardware failure
    • Monitor system performance
    • Create file systems, take backup and restore
    • Install software and do software management
    • Create a backup and recover policy
    • Monitor Linux network communication
    • Configure remote login services
    • Update system as soon as new version of OS and application software comes out
    • Implement the policies for the use of the computer system and network
    • Setup security policies for users.
    • Have a strong grasp of computer security (e.g. firewalls and intrusion detection systems).
    • Understand Process Management and Memory Management
    • Implement FTP Server, TFTP Server, CVS Server, DNS Server, DHCP Server, NFS Server, Apache Web Server, Configuring Proxy Server, A Database Server
    • Understand and write efficient Shell Scripts for System/Network Administration
Training Topics in Brief:
  • Introduction to Linux
  • Getting comfortable with basic linux commands and utilities
  • Text editings and shell scripting
  • Overview of Installation and configuration
    • Installation using media
    • Installation using USB
    • Installation using network & Servers
  • Configure and Implement TFTP, FTP, DNS, DHCP, NFS, Apache, Proxy and Database Server

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