[root@localhost ~]# ipmitool
Could not open device at /dev/ipmi0 or /dev/ipmi/0 or /dev/ipmidev/0: No such file or directory

[root@localhost ~]# modprobe ipmi_msghandler
[root@localhost ~]# modprobe ipmi_devintf
[root@localhost ~]# modprobe ipmi_si

[root@localhost ~]# ipmitool lan print 1
Could not open device at /dev/ipmi0 or /dev/ipmi/0 or /dev/ipmidev/0: No such file or directory

[root@localhost ~]# ipmitool lan print
Could not open device at /dev/ipmi0 or /dev/ipmi/0 or /dev/ipmidev/0: No such file or directory

[root@localhost ~]# lsmod | grep -i ipmi
ipmi_devintf           17572  0
ipmi_si                53582  0
ipmi_msghandler        46608  2 ipmi_devintf,ipmi_si

[root@localhost ~]# service ipmi start
Redirecting to /bin/systemctl start  ipmi.service

[root@localhost ~]# ipmitool lan print
Could not open device at /dev/ipmi0 or /dev/ipmi/0 or /dev/ipmidev/0: No such file or directory

May 19 12:17:47 localhost systemd: Stopping IPMI Driver...
May 19 12:17:47 localhost systemd: Starting IPMI Driver...
May 19 12:17:47 localhost kernel: ipmi message handler version 39.2
May 19 12:17:47 localhost kernel: IPMI System Interface driver.
May 19 12:17:47 localhost kernel: ipmi_si: probing via SMBIOS
May 19 12:17:47 localhost kernel: ipmi_si: SMBIOS: io 0xca8 regsize 1 spacing 4 irq 0
May 19 12:17:47 localhost kernel: ipmi_si: Adding SMBIOS-specified kcs state machine
May 19 12:17:47 localhost kernel: ipmi_si: Trying SMBIOS-specified kcs state machine at i/o address 0xca8, slave address 0x20, irq 0
May 19 12:17:47 localhost kernel: ipmi_si: There appears to be no BMC at this location
May 19 12:17:47 localhost kernel: ipmi device interface
May 19 12:17:47 localhost systemd: Started IPMI Driver.