Network Archives - scmGalaxy

SNMP is the Simple Network Management Protocol

by scmgalaxy KJanuary 8, 2018February 27, 2021NetworkLeave a Comment

The SNMP protocol is used by network management systems to communicate with network elements.For this to work, the network element must be equipped with an SNMP agent.

Most professional-grade network hardware comes with an SNMP agent built in. These agents must be enabled and configured to communicate with the network management system.Operating systems, such as Unix and Windows, can also be configured with SNMP agents.

Simple Network Management Protocol (SNMP) is a UDP-based network protocol. It is used mostly in network management systems to monitor network-attached devices for conditions that warrant administrative attention.

What is Network File System (NFS)

by scmgalaxy KJanuary 8, 2018February 27, 2021NetworkLeave a Comment

Network File System (NFS) is a network file system protocol originally developed by Sun Microsystems in 1984, allowing a user on a client computer to access files over a network in a manner similar to how local storage is accessed. NFS, like many other protocols, builds on the Open Network Computing Remote Procedure Call (ONC RPC) system. The Network File System is an open standard defined in RFCs, allowing anyone to implement the protocol.

The NFS protocol is designed to be independent of the computer, operating system, network architecture, and transport protocol. This means that systems using the NFS service may be manufactured by different vendors, use different operating systems, and be connected to networks with different architectures. These differences are transparent to the NFS application, and thus, the user.

Tagged : Network / Network file system / NFS / NFS Introduction / NFS Overview / What is network file system (nfs)

How to Start and Stop Nagios Core | Nagios Tutorial

by scmgalaxy KApril 20, 2017February 27, 2021IT Infrastructure Monitoring Tools / NetworkLeave a Comment

Starting Nagios Core

Init Script: The easiest way to start the Nagios Core daemon is by using the init script like so:

/etc/rc.d/init.d/nagios start

Manually: You can start the Nagios daemon manually with the -d command line option like so:

/usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg

Restarting Nagios Core

Restarting/reloading is nececessary when you modify your configuration files and want those changes to take effect.

Init Script: The easiest way to restart the Nagios Core daemon is by using the init script like so:

/etc/rc.d/init.d/nagios reload

Web Interface: You can restart the Nagios Core through the web interface by clicking the “Process Info” navigation link and selecting “Restart the Nagios process”:

Manually: You can restart the Nagios Core process by sending it a SIGHUP signal like so:

kill -HUP <nagios_pid>

Stopping Nagios Core

Init Script: The easiest way to stop the Nagios Core daemon is by using the init script like so:

/etc/rc.d/init.d/nagios stop

Web Interface: You can stop the Nagios Core through the web interface by clicking the “Process Info” navigation link and selecting “Shutdown the Nagios process”:

Manually: You can stop the Nagios Core process by sending it a SIGTERM signal like so:

kill <nagios_pid>