Q:

How to activate rpcbind service in CentOS installed on virtual box?

I installed CentOS7 on Virtualbox. I have installed port map using sudo yum install portmap and then tried to enable it with service rpcbind start however I can not enable the service. I tried rebooting and entering following codes but nothing happened:
[hadi@localhost ~]$ systemctl enable rpcbind.socket
[hadi@localhost ~]$ systemctl restart rpcbind.service
Job for rpcbind.service failed because the control process exited with error code. See "systemctl status rpcbind.service" and "journalctl -xe" for details.

I appreciate your suggestions
if you need the status of rpcbind:
    Redirecting to /bin/systemctl status  -l rpcbind.service
● rpcbind.service - RPC bind service
   Loaded: loaded (/usr/lib/systemd/system/rpcbind.service; indirect; vendor preset: enabled)
   Active: failed (Result: exit-code) since Sat 2017-06-17 18:32:07 IRDT; 32s ago
  Process: 4382 ExecStart=/sbin/rpcbind -w $RPCBIND_ARGS (code=exited, status=127)

Jun 17 18:32:07 localhost.localdomain systemd[1]: Starting RPC bind service...
Jun 17 18:32:07 localhost.localdomain rpcbind[4382]: /sbin/rpcbind: symbol lookup error: /sbin/rpcbind: undefined symbol: libtirpc_set_debug
Jun 17 18:32:07 localhost.localdomain systemd[1]: rpcbind.service: control process exited, code=exited status=127
Jun 17 18:32:07 localhost.localdomain systemd[1]: Failed to start RPC bind service.
Jun 17 18:32:07 localhost.localdomain systemd[1]: Unit rpcbind.service entered failed state.
Jun 17 18:32:07 localhost.localdomain systemd[1]: rpcbind.service failed.

A:

Please see this bug report:
https://bugzilla.redhat.com/show_bug.cgi?id=1396291

rpcbind can fail to start after updating to the 7.3 rpcbind package
  from an earlier version, if the libtirpc package is not updated as
  well.

  [...]

  Updating the libtirpc package fixes this issue.

In other words: 
update the libtirpc package and then restart rpcbind.

