Documentation=https://www.freedesktop.org/wiki/Software/systemd/hostnamed
[Service]
-ExecStart=@rootlibexecdir@/systemd-hostnamed
BusName=org.freedesktop.hostname1
-WatchdogSec=3min
CapabilityBoundingSet=CAP_SYS_ADMIN
-PrivateTmp=yes
+ExecStart=@rootlibexecdir@/systemd-hostnamed
+IPAddressDeny=any
+LockPersonality=yes
+MemoryDenyWriteExecute=yes
+NoNewPrivileges=yes
PrivateDevices=yes
PrivateNetwork=yes
-ProtectSystem=strict
-ProtectHome=yes
+PrivateTmp=yes
ProtectControlGroups=yes
-ProtectKernelTunables=yes
+ProtectHome=yes
ProtectKernelModules=yes
-MemoryDenyWriteExecute=yes
-RestrictRealtime=yes
-RestrictNamespaces=yes
+ProtectKernelTunables=yes
+ProtectSystem=strict
+ReadWritePaths=/etc
RestrictAddressFamilies=AF_UNIX
-SystemCallFilter=~@clock @cpu-emulation @debug @keyring @module @mount @obsolete @raw-io @reboot @swap
+RestrictNamespaces=yes
+RestrictRealtime=yes
+RestrictSUIDSGID=yes
SystemCallArchitectures=native
-LockPersonality=yes
-IPAddressDeny=any
-ReadWritePaths=/etc
+SystemCallErrorNumber=EPERM
+SystemCallFilter=@system-service sethostname
+WatchdogSec=3min