System and Service Manager systemd is a suite of basic building blocks for a Linux system. It provides a system and service manager that runs as PID 1 and starts the rest of the system.

A: By default, systemd places all systemd daemons in their own cgroup in the “cpu” hierarchy. Unfortunately, due to a kernel limitation, this has the effect of disallowing RT entirely for the service.

systemd-boot reads simple and entirely generic boot loader configuration files; one file per boot loader entry to select from. All files need to reside on the ESP.

When you have systemd running to the extent that it can provide you with a shell, please use it to extract useful information for debugging. Boot with these parameters on the kernel command line:

So you are wondering about resource management with systemd, you know Linux control groups (cgroups) a bit and are trying to integrate your software with what systemd has to offer there.

Systemd provides three unit types that are useful for the purpose of resource control: Services encapsulate a number of processes that are started and stopped by systemd based on configuration.

Its primary purpose is for ordering things properly at shutdown: since the shutdown ordering of units in systemd is the reverse of the startup ordering, any unit that has After=network.target can be sure that …

The nss-systemd module will synthesize user records implicitly for all currently allocated dynamic users from this range. Thus, NSS-based user record resolving works correctly without those users being in …

Starting with v197 systemd/udev will automatically assign predictable, stable network interface names for all local Ethernet, WLAN and WWAN interfaces. This is a departure from the traditional interface …

systemd (since version 239) supports a concept of “Portable Services”. “Portable Services” are a delivery method for system services that uses two specific features of container management: