nprobe is controlled using utility systemctl on operating systems
and distributions that use the systemd service manager.
Upon successful package installation, the nprobe service is
automatically started on the loopback interface. The service uses a
configuration file that is located at /etc/nprobe/nprobe.conf and
that is populated with some defaults during installation. The
configuration file can be edited and extended with any configuration
option supported by nprobe. A service restart is required after
configuration file modifications.
The nprobe service is always started on boot by default. The service must be disabled to prevent this behavior.
The configuration file is located at /etc/nprobe/nprobe.conf.
To start, stop and restart the nprobe service type:
# systemctl start nprobe
# systemctl stop nprobe
# systemctl restart nprobe
To prevent nprobe from starting on boot type:
# systemctl disable nprobe
To start nprobe on boot, assuming it has previously been disabled, type:
# systemctl enable nprobe
To check the status of the service, including its output and PID, type:
# systemctl status nprobe
There are circumstances under which multiple instances of the nprobe
service may run on the same host. To manage a particular <instance>
of the service, append an @<instance> to the nprobe service name.
Typically, <instance> corresponds to an interface name (e.g., eno1)
or to none when nprobe is used in collector mode. This convention
allows an easy identification of the purpose of each
service. Nonetheless, any string is acceptable as value for <instance>.
The <instance> uniquely identifies a service and its corresponding
configuration file that is located under
/etc/nprobe/nprobe-<instance>.conf.
For example, to start two nprobe services, one on interface eno1 and
another to collect netflow, one can add two configuration files:
/etc/nprobe/nprobe-eno1.conf
/etc/nprobe/nprobe-none.conf
And then start the services with:
# systemctl start nprobe@eno1
# systemctl start nprobe@none
Optionally, one may want to start the services on boot with:
# systemctl enable nprobe@eno1
# systemctl enable nprobe@none
The status of the services above can be controlled with:
# systemctl status nprobe@eno1
# systemctl status nprobe@none