1. Installing and configuring server
A server is basically a computer program that facilitate the same computer or other computer by providing services to them.
It is most important element of Modern OS and network design.
It is of system administrator to configure server so that the most essential server remain inaccessible. He must be aware of types of attack and security bugs.
2. Installing and configuring application software
In order to ensure a correct execution environment, administrator must provide software which is well configured and validate.
He should ensure adequate memory allotment and resolve software failure and dependency issues.
He must provide a set of activities to control hardware and software configuration and maintain policies for users.
3. Creating and maintaining user accounts
User can access his own account but administrator has access to every user account.
He can add, modify, delete or copy user account.
He is responsible for maintaining security by providing role on a user account that define the level of access.
4. Backing up and restoring files
To minimize the loss of data, administrator must maintain backup of files nd he should restore it whenever required.
Administrator can take backup in removable media such as hard drives or tapes as protection against loss.
Before creating backup administrator must decide.
o What are necessary to backup?
o How frequently backup should perform.
5. Monitoring and tuning performance
Monitoring and tuning of performance is essential for Linux to work more efficiently.
Administrator must identify system bottleneck and should solve them.
Administrator can use system tools to increase performance, he can determine when hardware need to be upgrade.
He should identify early sign of failure .
6. Configuring a secure system
It is a duty of administrator to involve tasks and decisions to run secure Linux system and maintaining data integrity.
It provide strong protection to individuals and corporate bodies and protecting parts of system even if it is under attack.
Administrator should ensure
o System has firewall.
o Not allow connection from unknown network.
o Not install software if not needed.
7. Using tools to monitor security
Linux is the preferred operating system who demands secure networks, buy it can be easily crack by hackers.