General and System Related Duties

  • User administration (setup and maintaining account)
  • Maintaining system
  • Verify that peripherals are working properly
  • Quickly arrange repair for hardware in occasion of hardware failure
  • Monitor system performance
  • Create file systems
  • Install software
  • Create a backup and recovery policy
  • Monitor network communication
  • 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. A sysadmin must have a strong grasp of computer security (e.g. firewalls and intrusion detection systems)
  • Documentation in form of internal wiki
  • Password and identity management
  • Fully supporting, configuring, maintaining and upgrading corporate customer’s networks and in house servers
  • Installing and integrating new server hardware and applications
  • Keeping an eye out for needed updates
  • Monitor and remove virus, spyware, and other non-authorized software

Source :
https://www.cyberciti.biz/faq/what-is-the-role-of-the-system-administrator