伙计们，
我创build了一个脚本来保持与3G调制解调器的持续“紧急”连接，所以如果通常的networking出现故障，我可以远程访问我的CentOS 7临时服务器。 一切都可以工作几秒钟，但是有人用SIGTERM杀死了pppd：
Jul 08 17:03:29 helicarrier systemd[1]: Starting Network Manager Script Dispatcher Service... Jul 08 17:03:29 helicarrier dbus-daemon[605]: dbus[605]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Jul 08 17:03:29 helicarrier dbus[605]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Jul 08 17:03:29 helicarrier systemd[1]: Started Network Manager Script Dispatcher Service. Jul 08 17:03:29 helicarrier nm-dispatcher[12292]: Dispatching action 'up' for ppp0 Jul 08 17:03:29 helicarrier chronyd[616]: Source 146.164.48.5 online Jul 08 17:03:29 helicarrier chronyd[616]: Source 5.9.110.236 online Jul 08 17:03:29 helicarrier chronyd[616]: Source 192.99.2.8 online Jul 08 17:03:29 helicarrier chronyd[616]: Source 200.192.232.8 online Jul 08 17:03:53 helicarrier pppd[12279]: Terminating on signal 15 Jul 08 17:03:53 helicarrier pppd[12279]: Child process pppd (charshunt) (pid 12280) terminated with signal 15 Jul 08 17:03:53 helicarrier pppd[12279]: Modem hangup Jul 08 17:03:53 helicarrier pppd[12279]: Connect time 0.4 minutes. Jul 08 17:03:53 helicarrier pppd[12279]: Sent 4817 bytes, received 1170 bytes. Jul 08 17:03:53 helicarrier pppd[12279]: Script /etc/ppp/ip-down started (pid 12323) Jul 08 17:03:53 helicarrier pppd[12279]: Connection terminated. Jul 08 17:03:53 helicarrier NetworkManager[702]: <info> (ppp0): device state change: activated -> unmanaged (reason 'removed') [100 10 36] Jul 08 17:03:53 helicarrier NetworkManager[702]: <info> (ppp0): deactivating device (reason 'removed') [36] Jul 08 17:03:53 helicarrier NetworkManager[702]: <info> NetworkManager state is now CONNECTED_LOCAL Jul 08 17:03:53 helicarrier dbus-daemon[605]: dbus[605]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm...er.service' Jul 08 17:03:53 helicarrier dbus[605]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' 为了使事情更可读，这是相关的一行：
Jul 08 17:03:53 helicarrier pppd[12279]: Connection terminated.
我怎样才能find发送这个杀手的程序呢？ NetworkManager是我的主要嫌疑人，但我不认为它应该弄乱我的连接，因为我还没有用它来连接（我使用我自己的老式pppd +聊天脚本和一些技巧来保持连接总是上）。