My old S905X device (which worked fine for a couple of years) developed the following problem: when it starts, everything works. Then, after a few hours of uptime, suddenly it seems that it loses a network connectivity (it is connected via an ethernet port - wifi is not used on this device). As the result, I cannot ssh to the machine, and I see that kodi logs contain error messages about failure to resolve host names (when an attempt to play something from a network is attempted).
In order to understand the problem I need to access system logs, but the problem is that in order to get to those logs I have to reboot the device to get network connectivity (so that I can ssh in). But journal logs are volatile, so logs are lost during a reboot.
Is it somehow possible to make system logs persistent? Since /var is mounted as tmpfs, I cannot create a /var/log/journald directory for journald to use permanent logs.
What can be done to get persistent system logs?
The machine has the latest version of coreelec.