$ sudo systemctl status  boinc-client
● boinc-client.service - LSB: This script monitors the BOINC client.
   Loaded: loaded (/etc/rc.d/init.d/boinc-client; generated)
   Active: active (exited) since Sun 2020-07-05 15:31:44 +08; 1h 9min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 2032 ExecStart=/etc/rc.d/init.d/boinc-client start (code=exited, status=0/SUCCESS)

июл 05 15:31:40 comp-celeron-cpu-ec65a4 systemd[1]: Starting LSB: This script monitors the BOINC client....
июл 05 15:31:40 comp-celeron-cpu-ec65a4 runuser[2063]: pam_unix(runuser:session): Session opened for boinc by (uid=0)
июл 05 15:31:40 comp-celeron-cpu-ec65a4 runuser[2063]: pam_unix(runuser:session): Session closed for boinc
июл 05 15:31:40 comp-celeron-cpu-ec65a4 boinc-client[2032]: /etc/rc.d/init.d/boinc-client: line 336: [: too many arguments
июл 05 15:31:40 comp-celeron-cpu-ec65a4 boinc-client[2032]: [55B blob data]
июл 05 15:31:44 comp-celeron-cpu-ec65a4 boinc-client[2032]: Starting BOINC client as a daemon:
июл 05 15:31:44 comp-celeron-cpu-ec65a4 systemd[1]: Started LSB: This script monitors the BOINC client..

это статус клиента 

но когда вводишь

ps -A |grep boinc
3658 ?        00:00:03 boincmgr

показывает что активен только менеджер

uname -a
Linux comp-celeron-cpu-ec65a4 5.4.28-std-def-alt1 #1 SMP Wed Mar 25 17:50:11 UTC 2020 x86_64 GNU/Linux

boinc-client --version
7.8.4 x86_64-pc-linux-gnu