"Hello World!"
+#### <a id="string-literals-escape-sequences"></a> String Literals Escape Sequences
+
Certain characters need to be escaped. The following escape sequences
are supported:
PidPath |**Read-write.** Contains the path of the Icinga 2 PID file. Defaults to RunDir + "/icinga2/icinga2.pid".
Vars |**Read-write.** Contains a dictionary with global custom attributes. Not set by default.
NodeName |**Read-write.** Contains the cluster node name. Set to the local hostname by default.
-UseVfork |**Read-write.** Whether to use vfork(). Only available on *NIX. Defaults to true.
EventEngine |**Read-write.** The name of the socket event engine, can be "poll" or "epoll". The epoll interface is only supported on Linux.
AttachDebugger |**Read-write.** Whether to attach a debugger when Icinga 2 crashes. Defaults to false.
RunAsUser |**Read-write.** Defines the user the Icinga 2 daemon is running as. Used in the `init.conf` configuration file.