Since You are the only Linux administrator for a very small company, the option that is the BEST way to log into the system each morning is option b: Log in as a regular user and then use SU as needed to solve problems.
A bachelor's degree in computer science, information technology, information science, telecommunications, or a related field is required for a Linux system administrator. The candidate ought to have a good deal of Linux work experience. Candidates with a master's degree or another type of specialization are sometimes hired by organizations.
Note that A Linux administrator is a back-end IT expert who performs the following tasks on Linux operating systems: installs and configures Linux systems, including back-end scripts and databases. examines error logs to carry out system maintenance.
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