I made my own linux distribution with buildroot. In "make menuconfig" and "make linux-menuconfig" I checked all options related to "ppp" and "pppd". Unfortunately, after building my distribution I can't use the commands "pon", "poff", "plog" and probably others. The system cannot see them. I looked and they are not in "/ usr / bin" or "/ usr / sbin". What could be causing this? I found out somewhere that these are debian-only commands, but how can I enable the pppd daemon?
ppd, pppd, pon, and etc are userland applications you need to install them using buildroot. So far you have enabled support in the kernel for ppp but you have not installed the actual application that manages the ppp connections which is pppd
If build root doesn't already have a package for ppp/pppd, you can make a recipe to do that. The official website is: https://ppp.samba.org/
pon, poff, and plog can be found in the scripts directory of the sources code.