Types of system administrators

System administrators can have a narrow focus and general (so-called generalists). System administrators with a general specialization are versed in various issues related to PC maintenance, and such specialists are most in demand in non-IT companies. It is more difficult for sysadmins with a narrow specialization to find a job, however, such specialists can solve the most complex problems and may be in demand in IT companies.

Types and types of system administrators: linux system

Web server administrator (in fact, this is the minimum knowledge of how to configure Apach, Nginx or IIS) 

Network administrator (more biased in networking - working with routers, VPN settings, etc.)

Network Security Administrator (anti-intrusion bias, running scanners to detect vulnerabilities, installing updates, etc.)

Administrator of mail servers (specializes in maintaining the health of mail servers, protecting users from unwanted emails, backups, working with quotas, etc.)

Additionally:

Database administrator (or DBA - in fact, has nothing to do with sysadmins and is exclusively engaged in tuning and working with a database, for example, Oracle)

Online sysadmin courses (beginners and advanced) at LinuxTrainingCenter

For sysadmins, the Linux Training Center has prepared an excellent course on learning Linux. The course "training for system administrators " includes:

After our course, you will gain practical skills of Linux system administrators at a level sufficient to perform all basic system administrator tasks (including practice in installing / configuring / administering Linux servers, setting up a network, configuring a Web server, etc.)