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Solr standalone server (Ubuntu 18.04, Solr 7.6) over KVM

* Ubuntu server 18.04 LTS (from ISO)
* 20GB virtualdisk mounted as / (root)
* 100GB virtualdisk mounted as /var
* Set IPv4 and IPv6
* Java 8

apt install openjdk-8-jdk

extend ulimit

nano -w /etc/systemd/system.conf
	DefaultLimitNOFILE=65535
	DefaultLimitNPROC=65535

nano -w /etc/systemd/user.conf
	DefaultLimitNOFILE=65535
	DefaultLimitNPROC=65535

nano -w /etc/security/limits.conf
	*       hard    nofile  65535
	*       soft    nofile  65535
	*       hard    nproc   65535
	*       soft    nproc   65535

reboot

ulimit -a
open files                      (-n) 65535
max user processes              (-u) 65535