Hello,
I've successfully updated elastic from version 2.3.5 to latest 5.4.1 version on my CentOS 6.9 Linux. In the past, I used the following command to check if indices exist with success.
/usr/bin/curl -i -XHEAD localhost:9200/_template/network
Now the same command never finish to run. If I change -XHEAD for -XGET, the command complete ! Look to me that there is something with the -XHEAD command.
Regards,