I have installed Elasticsearch 6.x in my Debian 7 (wheezy). I tried to start with service elasticsearch start but its give me an error message
Debian 7 (wheezy)
service elasticsearch start
Okay i have find the solution. Apparently my vm memory storage (RAM) was 1 GB - 2 GB, so i increase my VM's RAM capacity to at least 4GB and i reboot the machine. And elastic search started work just fine.