Hello, they are different possible causes that Kamailio could not be started. Nowadays Kamailio is usually started with systemd or other init system, depending on the distribution. Have a look to the Kamailio log output (e.g. in /var/log/messages or /var/log/syslog) to get more information, in many cases there are some hints in the error messages. Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com<https://gilawa.com/> From: sr-users &lt;sr-users-bounces(a)lists.kamailio.org&gt; On Behalf Of Silvère Dekpon Sent: Sunday, February 21, 2021 1:07 PM To: sr-users(a)lists.sip-router.org Subject: [SR-Users] Problem with kamalio. Hi, how are you. I got this mail on github kamalio page. Here is my problem detail : Everytime when my vps reboot, i got a problem with my kamalio. It seems like service can't start. So i have to restart it myself by using "kamctl restart". When i enter this command, i got an error on screen. Here is error detail : ERROR: PID file /var/run/kamailio/kamailio.pid does not exist -- Kamailio start failed How can i solve it ?