Sysadmin Monitoring Tools

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Top 5 Monitoring Tools Every System Administrators Should Know

The system administrators are responsible for monitoring the software network/server that provides the backbone of any company’s business. They must be aware of the activities and detect any slowing down or defective components. Monitoring tools we’ll be showing here can send out updates and activate backup copies to prevent interruptions due to server crashes, overloads, network connections, or other factors. The monitoring software can also send an alert message to the system administrator to inform them of any faults. This will enable them to set up failover systems and eliminate the problem until it is fixed.

If you are looking for tools to monitor small and large infrastructures, this list contains the top open-source applications and network monitoring software.

Zenoss Core

Zenoss Core, a server and network management platform based on the Zope server and written in Python is Zenoss Core. It combines original programming with several open-source projects to integrate data storage as well as data collection. The Web-based user interface allows users to access data. It allows users to monitor availability, inventory, configuration, performance, and other events. Zenoss Core can monitor network devices via SNMP and SSH. This includes network services such as HTTP, POP3, NNTP, and host resources (processors, disk usage, etc.) for most systems network operations. ZenPacks provides a plug-in architecture that allows community members to expand its functionality. ZenPacks can be encapsulated using Python, instrumentation supplies, and reports to support the tracking infrastructure.


Cacti is a web-based graphical tool that provides an interface to RRDtool data storage. It also offers a graphical utility that allows users to monitor and graph CPU load, network bandwidth usage, traffic network, etc. Cacti can also be used to set up data collection, which allows for specific configurations to be managed without the need to use RRDtool. Cacti allow polling services within a pre-defined period and drawing the graph of the data. It is used to graph the time series data for parameters like the CPU load or network bandwidth usage. Cacti can be extended to control any source using shell scripts or executables. Cacti also support plug-in architecture. There is a large, active community who has gathered around the Cacti forums to share scripts, templates, and tips for creating plugins.


Nagios is a popular open-source network monitoring software. Although it was initially designed for Linux, other Unix versions are supported. Nagios monitors network services such as SMTP and POP3, HTTP, NNTP, and ICMP. It also monitors host resources such as processor load, disk usage, logs, and system logs. The remote control can be managed via encrypted SSL or SSH tunnels. Nagios is simple in design and allows users to create their service checks based on their needs. You can also use any support tools you wish. Nagios makes it easy to create a hierarchy for the host network that includes the “parent” hosts. This allows you to distinguish between hosts that are below or unreachable. Notifications will be sent to the person responsible for the network via email, SMS, and other methods if services or reception issues arise.


Munin, like the Cacti, uses RRDtool for presenting graphical results via a web interface. It uses a master/node architecture, where the master binds all nodes at regular intervals and requests data. Munin allows you to quickly and easily monitor your computers, networks, and SAN networks. It is easy to spot a problem and see how it uses all the restricted resources. The Munin plugin’s main priority is its plug-and-play architecture. Many control plugins can be used to make it work, and they don’t require any modifications.


Zabbix, a type of business-type surveillance system, is fully equipped with commercial support. It can monitor and track various network services, servers, and other hardware. Zabbix offers great visualization capabilities, including zoom, zoom-in, and cartography. The versatile communication system allows for quick and simple configuration of different notifications for predefined events. Zabbix consists of three major modules: the server and agents, as well as the user. You can store tracking data using MySQL, PostgreSQL, or Oracle as the database. Zabbix is a tool that allows users to monitor the performance and availability of standard services such as SMTP and HTTP. A Zabbix agent must also be installed on the host to monitor statistics such as CPU load, network usage, and disk space. Zabbix supports monitoring via SNMP, TCP, and ICMP controls. It also offers support for custom parameters and IPMI.