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See Alias (page 923) and Allow (page 930) for more information. in .NET Receive UPC-13 in .NET See Alias (page 923) and Allow (page 930) for more information.

See Alias (page 923) and Allow (page 930) for more information. generate, create ean13 none for .net projects ISO Specification 652 17 Configuring and Monitoring a LAN Figure 17-7. The Cacti Installation Guide screen The Cacti Poller The Cacti poller .net vs 2010 EAN 13 is run by the /etc/cron.d/cacti crontab file.

The */5 entry in this file causes crond to execute the script every five minutes. For more information refer to Crontab Files on page 606..

$ cat /etc/cron.d /cacti MAILTO=root */5 * * * * www-data php /usr/share/cacti/site/poller.php >/dev/null 2>/var/log/cacti/poller-error.

log. Configuring Cacti Point a Web brows er on the machine running Cacti at localhost/cacti; Apache redirects the browser to the Cacti installation page at localhost/cacti/install and displays the Cacti Installation Page screen. Click Next. Confirm the information on the Cacti Installation Guide screen (Figure 17-7) and click Next.

The next screen displays several file pathnames and information about which versions of Net-SNMP and RRDTool are installed. Review this information and click Finish. Next Cacti displays the User Login screen.

Log in with the username admin and the password admin. Cacti then forces you to change the password for the cacti database user named admin. After you change the password, Cacti displays the main Console screen (Figure 17-8).

The name of the screen appears just below the Console tab at the upper-left corner of the screen.. Basic Cacti Administration By default, Cacti collects data from localhost (the system it is installed on). Once a few poller cycles have passed (approximately 15 minutes after you installed Cacti), Cacti will display this information. You must install snmpd on the local system if you want to monitor the local system (page 654).

. Introduction to Cacti Figure 17-8. The Cacti main Console screen You must install snmpd on the local system to monitor the local system tip You must install and configure snmpd on the local system, just as you would on a remote system,. if you want to mo .NET ean13+5 nitor the local system. For more information refer to Setting Up a Remote Data Source on page 654.

. From the main Con sole screen, click View your new graphs or click the Graphs tab at the top of the screen. Cacti displays the default graphs in tree mode for localhost (Figure 17-9, next page). Cacti creates graphs for the following data sources: memory usage, load average, logged-in users, and number of processes.

If you click one of the graphs, Cacti displays a page with four graphs for the data source you clicked: daily, weekly, monthly, and yearly. These graphs will mostly be blank until Cacti collects sufficient data to fill them. To store the data it collects and to display graphs, Cacti uses RRDTool.

Cacti graphs show more detail over short time spans, and less detail (averaged, or otherwise aggregated) over longer time spans. To zoom in on a graph, click the magnifying glass icon on the right side of a graph; Cacti displays a single graph and the mouse pointer changes to a cross hairs. Drag the cross hairs horizontally over the part of the graph that represents the time period you are interested in.

In response, Cacti regenerates the graph for that time period.. 654 17 Configuring and Monitoring a LAN Figure 17-9. Default graphs for localhost You can control t he graphs using the tabs along the upper-right edge of the screen. The Settings tab allows you to set your preferences for displaying graphs; the Tree View tab displays a hierarchy of graphs, allowing you to select the devices or graphs you are interested in; the List View tab displays a list of all available graphs; and the Preview tab displays small previews of all available graphs. In addition, the List View and Preview tabs provide a filter at the top of the screen that allows you to display a subset of graphs.

. The Cacti Console Tab Clicking the Cons ole tab displays the main Console screen (Figure 17-8, previous page), from which you can manage Cacti. The main Console screen has a menu on the left side and shows the pathname of the screen it is displaying just below the Console tab. At the upper-right corner of the screen is the name of the user (admin) and a Logout button.

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