Thank you for your desire to help me! Finally, I have succeeded in making the service to start. After I have unpacked the
packetbeat deb file, I tried to start it, but I forgot to install
libpacap. After I have installed
libpcap, I still had the error I posted in the picture. After a lot of trials, I have found the solution. I have ran
sudo packetbeat test config -e. This last command has saved my life. It printed an error where it was written what command should I run in order to make it start (it was:
sudo chmod go-w packetbeat.yml, because I had previously ran
sudo chmod 777 packetbeat.yml in order to have the possibility to edit this configuration file). Best luck!