Error on X-Pack installation in Kibana

When i try to install X-Pack to Kibana i got a problem.

[root@elastic-kibana-01 kibana]# bin/kibana-plugin install x-pack
Found previous install attempt. Deleting...
Attempting to transfer from x-pack
Attempting to transfer from https://download.elastic.co/kibana/x-pack/x-pack-5.0.0-alpha4.zip
Transferring 60685004 bytes....................
Transfer complete
Retrieving metadata from plugin archive
Killed

Can anybody help me with this?

Killed implies something stopped it, have you retried?

Yes, i try many times.
I update zip and unzip packages, but nothing has changed.

I stop kibana only after that I had successfully installed X-Pack
OOM killer has killed installation process.