我在 CentOS 上安装了 Elasticsearch rpm，当我尝试通过以下方式启动它时遇到此错误systemctl start elasticsearch：
Feb 20 21:08:34 server.cberdata.org systemd[1]: Started Elasticsearch.
Feb 20 21:08:34 server.cberdata.org elasticsearch[4226]: OpenJDK 64-Bit Server VM warning: Cannot open file /var/log/elasticsearch/gc.log due to Permission denied
Feb 20 21:08:51 server.cberdata.org systemd[1]: elasticsearch.service: main process exited, code=exited, status=78/n/a
Feb 20 21:08:51 server.cberdata.org systemd[1]: Unit elasticsearch.service entered failed state.
Feb 20 21:08:51 server.cberdata.org systemd[1]: elasticsearch.service failed.
尤其： Cannot open file /var/log/elasticsearch/gc.log due to Permission denied
权限/var：
drwxr-xr-x 21 root …