[Unit]
Description=the kernel time variables setting
DefaultDependencies=no
After=local-fs.target
Before=sysinit.target

[Service]
Type=oneshot
Environment="TICK=10000" "FREQ=0"
EnvironmentFile=-/etc/default/adjtimex
ExecStart=/sbin/adjtimex -tick ${TICK} -frequency ${FREQ}

[Install]
WantedBy=sysinit.target