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this tutorial：
$sudo systemctl start nagios Failed to start nagios.service: Unit nagios.service Failed to load: No such file or directory.
问题的原因是什么？
我有：
$sudo /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
Nagios Core 4.0.8
copyright (c) 2009-present Nagios Core Development Team and Community Contributors
copyright (c) 1999-2009 Ethan galstad
Last Modified: 08-12-2014
License: GPL
Website: http://www.nagios.org
Reading configuration data...
Read main config file okay...
Read object config files okay...
Running pre-flight check on configuration data...
Checking objects...
Checked 8 services.
Checked 1 hosts.
Checked 1 host groups.
Checked 0 service groups.
Checked 1 contacts.
Checked 1 contact groups.
Checked 24 commands.
Checked 5 time periods.
Checked 0 host escalations.
Checked 0 service escalations.
Checking for circular paths...
Checked 1 hosts
Checked 0 service dependencies
Checked 0 host dependencies
Checked 5 timeperiods
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...
Total Warnings: 0
Total Errors: 0
Things look okay - No serIoUs problems were detected during the pre-flight check
我创建了这个文件：
sudo vi /etc/systemd/system/nagios.service
并添加以下内容：
[Unit] Description=Nagios BindTo=network.target [Install] WantedBy=multi-user.target [Service] User=nagios Group=nagios Type=simple ExecStart=/usr/local/nagios/bin/nagios /usr/local/nagios/etc/nagios.cfg
然后是以下内容：
sudo systemctl enable /etc/systemd/system/nagios.service sudo systemctl start nagios sudo systemctl restart nagios