Meinberg GPS170PCI Manual de usuario descargar pdf (Pagina 12)

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ntpq> peer

The output of this command should be similar to figure 4.1.

For correct synchronization, the delay and offset values should be non-zero and the jitter value should

be under 100. An example of this is listed in figure 4.1.

Figure 4.1: NTP configuration example

It is necessary to clarify that if a machine is synchronized with an NTP server, it is mandatory that the other

machines that make up the HADES environment are also synchronized with the same server. In this way, the

quality of the obtained measurements is ensured. It is the responsibility of the user to include an NTP server in

this configuration that provides the desired functionality. More information on NTP configuration can be found in

[5].

4.5 Configuration of the Debian package manager

This section is dedicated to the configuration of aptitude, the Debian package manager needed in the

installation process of HADES. The configuration of this tool [6] is made as follows:

1. Go to the location “/etc/apt”

]$ cd /etc/apt

2. Edit the “sources.list” file using the command:

]$ nano -w sources.list

3. Comment (using “#”) the line that starts with “deb cdrom:[Debian GNU/...”

#deb cdrom:[Debian GNU/Linux 6.0.5 _Squeeze...

4. Add the appropriate lines to your sources.list file. In this example, the following lines were added:

deb http://downloads.perfsonar.eu/repositories/deb/ stable main

5. Save the changes and quit editing the file.

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Meinberg GPS170PCI Manual de usuario Pagina 12