System Administrator (sys admin) is a personal that a computer system or a computer network or collection of networks, computer maintenance and administration. The duties of a system administrator is extensive and from organization to organization, the other is different. A system administrator is usually the task of installation and support of servers, embeds, or other computer systems are responsible for.

tasks:
create a backup of the information
responsible for emergency services, security, system,
check files the logs and identify system bugs
update operating system and software
check network traffic
check network security
upgrade software
patch security
respond to technical questions, users, and help them
add up. Remove and update user accounts existing in the system and resets the password ...
responsible for documenting configuration files, system
identifying and troubleshooting debugging and reporting bugs system
install and configure software and hardware new