csci322-l1m1 Flashcards
System Administrator
is a person who manages one or more computer systems.
System Administrator have close relationships with?
Network Management
Computer System
any system running a operating system and capable of providing services to a user base or other hosts.
Role of the Systems Administrator
is to maximize a system.
- Reliability
- Integrity
- Security
- Performance
- Efficiency
- Ease of use
- Order
Reliability
- measure of the percentage of time a machine, service and network is usable
- mail, web and file sharing
Reliability and ??? go hand in hand.
Service level agreements (SLA)
How to measure of Reliability?
uptime which shows how long a system has been up.
Which tools can use to monitor services such as POP/IMAP, HTTP and FTP?
- nagios
- cacti
Reliability 4 9s?
4 9’s = 99.99% = 52 minutes downtime per year.
not included scheduled downtime!
Reliability 5 9s?
5 9’s = 5 minutes downtime per year.
not included scheduled downtime!
Integrity?
Data stored on a computer system can be trusted not to be LOST or DAMAGED.
Integrity is largely effected by?
- File system design e.g. disk failures
- Administration procedures e.g. backup
- Protocol and hardware design e.g. security
Solutions to ensure Integrity?
Bacula, Amanda, Legato, Tivoli, TripWire
Integrity and ??? go together.
Security
Security
Data stored on in transit through a computer network can be RELIED upon not to be;
- ALTERED
- DISCLOSED to UNAUTHORIZED PARITIES
Bacula
Bacula is a set of computer programs that permit managing backup, recovery, and verification of computer data across a network of computers of different kinds.
Security is effected by …..?
procedures and policy
High Security means ??? for the user
Lower Useability
Snort (Security tools)
Snort is a free and open source network intrusion prevention system (NIPS) and network intrusion detection system (NIDS)
Performance influence by?
- Underlying hardware
- Operating System
- Software design and bugs in software
- Tuning of operating system.
- Administration and End User practices
System Administrator Skills 1 ?
Programming
System Administrator Skills 2 ?
Systems
System Administrator Skills 3 ?
Support
System Administrator Skills 4 ?
Install hardware
System Administrator Skills 5 ?
Install and maintain software
System Administrator Skills 6 ?
Set and maintain configurations
System Administrator Skills 7 ?
Capacity Planning and Performance Tuning
System Administrator Skills 8 ?
Monitoring the systems
System Administrator Skills 9 ?
Diagnose and fix problems
System Administrator Skills 10 ?
Evaluate and recommend products
System Administrator Skills 11 ?
Maintain Local Documentation
System Administrator Skills 12 ?
Write procedures and policy
System Administrator Skills 13 ?
Enforcement and arbitration
System Administrator Skills 14 ?
Advise and educate users and managements
System and Network Admin?
Same
