systemd Developer Lennart Poettering lennart@poettering.net systemd.conf 5 systemd.conf systemd manager configuration file system.conf user.conf When run as system instance systemd reads the configuration file system.conf, otherwise user.conf. These configuration files contain a few settings controlling basic manager operations. All options are configured in the [Manager] section: LogLevel= LogTarget= LogColor= LogLocation= DumpCore=yes CrashShell=no ShowStatus=yes SysVConsole=yes CrashChVT=1 DefaultStandardOutput=journal DefaultStandardError=inherit Configures various parameters of basic manager operation. These options may be overridden by the respective command line arguments. See systemd1 for details about these command line arguments. CPUAffinity= Configures the initial CPU affinity for the init process. Takes a space-separated list of CPU indexes. DefaultControllers=cpu Configures in which cgroup controller hierarchies to create per-service cgroups automatically, in addition to the name=systemd named hierarchy. Defaults to 'cpu'. Takes a space separated list of controller names. Pass an empty string to ensure that systemd does not touch any hierarchies but its own. JoinControllers=cpu,cpuacct Configures controllers that shall be mounted in a single hierarchy. By default systemd will mount all controllers which are enabled in the kernel in individual hierachies, with the exception of those listed in this setting. Takes a space separated list of comma separated controller names, in order to allow multiple joined hierarchies. Defaults to 'cpu,cpuacct'. Pass an empty string to ensure that systemd mounts all controllers in separate hierarchies. RuntimeWatchdogSec= ShutdownWatchdogSec= Configure the hardware watchdog at runtime and at reboot. Takes a timeout value in seconds (or in other time units if suffixed with ms, min, h, d, w). If RuntimeWatchdogSec= is set to a non-zero value the watchdog hardware (/dev/watchdog) will be programmed to automatically reboot the system if it is not contacted within the specified timeout interval. The system manager will ensure to contact it at least once in half the specified timeout interval. This feature requires a hardware watchdog device to be present, as it is commonly the case in embedded and server systems. Not all hardware watchdogs allow configuration of the reboot timeout, in which case the closest available timeout is picked. ShutdownWatchdogSec= may be used to configure the hardware watchdog when the system is asked to reboot. It works as a safety net to ensure that the reboot takes place even if a clean reboot attempt times out. By default RuntimeWatchdogSec= defaults to 0 (off), and ShutdownWatchdogSec= to 10min. These settings have no effect if a hardware watchdog is not available. DefaultLimitCPU= DefaultLimitFSIZE= DefaultLimitDATA= DefaultLimitSTACK= DefaultLimitCORE= DefaultLimitRSS= DefaultLimitNOFILE= DefaultLimitAS= DefaultLimitNPROC= DefaultLimitMEMLOCK= DefaultLimitLOCKS= DefaultLimitSIGPENDING= DefaultLimitMSGQUEUE= DefaultLimitNICE= DefaultLimitRTPRIO= DefaultLimitRTTIME= These settings control various default resource limits for units. See setrlimit2 for details. Use the string infinity to configure no limit on a specific resource. They can be overriden in units files using corresponding LimitXXXX parameter. systemd1