Three tools covered 1. Nagios3 2. NTOP 3. Go Access For the full article. Please click the LI link below https://www.linkedin.com/pulse/linux-os-tools-my-learnings-viswesvaran-d

1. IT Monitoring tools

2. Where it is used ??
IT Operations
Network Operations
Service Support

3. Monitoring ?
 Car Dashboard
 Fuel Indicator
 Engine Oil indicator
 Brake oil indicator
 Nothing but alerts generated to bring attention and take necessary action

4. IT monitoring- Systems
Alerts for
System
Memory
Hard disk
Performance
Temperature
Power supply
&
Servers &
Applications

8. Alert for your Business
Running Web Server for Digital copy
of a newpaper
1.Status
2.How Many concurrent users
3. Loading of pages due to heavy users
4. Performance issues

9. Server Monitoring tools
 Tool -Nagios : Pro Active
Used for - IT Infrastructure ( System Health and Server performance)
Monitoring and Alerting
 Purpose :IT Admin functions delivery
 Learning Scope : IT Administrator of Huge IT infra

13. Nagios Features
Server Monitoring- Active mode
Network device like router, Switches -Active Mode
Application Monitoring -Passive mode

14. Practicals
Let us go Live Now

15. Type of Servers
 Web Servers
 Database Servers
 Media Server
 File Server

16. Purpose of Monitoring
Like Traffic signals are required for smooth flow of vehicles
STOP.(Red) .WAIT ( Amber) .START ( Green )
Alerts of various nature
Critical
Major,
Minor
Warning
Threshold
Information
will indicate the status of system health /web traffic flow

18. Computer Network
 Computer network is a group of computers that use a set of common
 communication protocols over digital interconnections for the purpose of
 sharing resources located on or provided by the network nodes. .
 The best-known computer network is the Internet.

19. NW Monitoring NTOP tools
Bandwidth
Ports Used
Web Site visited
Graphical way

20. NTOP Features
 Sort network traffic according to many criteria including
 IP address, port, L7 protocol, throughput, Autonomous Systems (ASs)
 Show realtime network traffic and active hosts
 Produce long-term reports for several network metrics including throughput
and application protocols
 Top talkers (senders/receivers), top ASs, top L7 applications
 Monitor and report live throughput, network and application latencies, Round
Trip Time (RTT), TCP statistics (retransmissions, out of order packets,

23. Practicals
Let us go Live Now

24. Real-time web log analyzer -Go Access
Reactive
Who will be the using this ?
System administrators
What for ?
To get Valuable HTTP statistics reports like
Determine .
Number of Hits,
Number of visitors,
Bandwidth Consumed
Metrics for slowest running requests by the hour, or date.

26. Practicals
Let us go Live Now

27. Take Away
Real Time Monitoring
Using Real time Tools
Nagios, NTOP and Go Access
Helps Administrators to
Improve the efficiency of System/Servers
Offer high performance experience to end users.
It can be integrated into email/Mobiles using plugins
References : https://www.ubuntupit.com/most-comprehensive-list-of-linux-
monitoring-tools-for-sysadmin/

28. Interact
 Have you got Theory and Practical both ?
 Have you understood the role of IT functions?
 Have you got information about how these montioring tools helps
Administrators?
Skills
Learn
Practic
e
Deliver