answer
systemctl start clam-freshclam.service
Failed to start clam-freshclam.service: Unit not found.
systemctl list-unit-files --type=service
UNIT FILE STATE
arp-ethers.service disabled
auditd.service enabled
[email protected] enabled
avahi-daemon.service enabled
blk-availability.service disabled
brandbot.service static
clamav-daemon.service disabled
clamav-freshclam.service disabled
clamd.service enabled
[email protected] static
[email protected] enabled
console-getty.service disabled
console-shell.service disabled
[email protected] static
cpupower.service disabled
crond.service enabled
csf.service enabled
da-popb4smtp.service enabled
dbus-org.freedesktop.Avahi.service enabled
dbus-org.freedesktop.hostname1.service static
dbus-org.freedesktop.import1.service static
dbus-org.freedesktop.locale1.service static
lines 1-23...skipping...
UNIT FILE STATE
arp-ethers.service disabled
auditd.service enabled
[email protected] enabled
avahi-daemon.service enabled
blk-availability.service disabled
brandbot.service static
clamav-daemon.service disabled
clamav-freshclam.service disabled
clamd.service enabled
[email protected] static
[email protected] enabled
console-getty.service disabled
console-shell.service disabled
[email protected] static
cpupower.service disabled
crond.service enabled
csf.service enabled
da-popb4smtp.service enabled
dbus-org.freedesktop.Avahi.service enabled
dbus-org.freedesktop.hostname1.service static
dbus-org.freedesktop.import1.service static
dbus-org.freedesktop.locale1.service static
dbus-org.freedesktop.login1.service static
dbus-org.freedesktop.machine1.service static
dbus-org.freedesktop.NetworkManager.service enabled
dbus-org.freedesktop.nm-dispatcher.service enabled
dbus-org.freedesktop.timedate1.service static
dbus.service static
debug-shell.service disabled
directadmin.service enabled
dm-event.service disabled
dnsmasq.service disabled
dovecot.service enabled
dracut-cmdline.service static
dracut-initqueue.service static
dracut-mount.service static
dracut-pre-mount.service static
dracut-pre-pivot.service static
dracut-pre-trigger.service static
dracut-pre-udev.service static
dracut-shutdown.service static
ebtables.service disabled
emergency.service static