I know that a lot of questions have already been asked about emergency mode when booting a Linux distro. (Seemingly Mint, Ubuntu, Redhat all have it.) Does it have documentation? What entity does it belong to (i.e. the Linux kernel, the distribution, the library)? I am just trying to orient myself, and all the information I have been able to find is of the form "do this and it will go away."
Thanks in advance.
It looks like there is possibly more than one emergency mode that can be entered during boot. I am also interested in knowing how to tell which one is which and where to get documentation for it. In my particular case, the Linux Mint symbol appears for a while and then the message "Welcome to emergency mode! After logging in, type "journlctl -xb" to view system logs...Give root password for maintenance."