Install Solr and upgrade old Solr version

Step 1. First, Install Java.

Because solr are Java based softwares we need the Java environment (As it is advised in the Solr wiki : prefere a full JDK to a simple JRE.)

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

sudo apt-get install oracle-java8-set-default

Step 3 – Setup JAVA_HOME and JRE_HOME Variable

nano /etc/environment

add two new lines

JAVA_HOME=/usr/lib/jvm/java-8-oracle
JRE_HOME=/usr/lib/jvm/java-8-oracle/jre

reboot then
to validate run  echo $JAVA_HOME





Install Default Solr version 

sudo add-apt-repository universe

---

Option 1: Install Solr with Tomcat

sudo apt-get install solr-tomcat

Option 2: Install Solr with Jetty

sudo apt-get install solr-jetty

Open the URL http://localhost:8080/solr/admin/, if your tomcat is listen on port 8080.

Notes 
if you get error during installation
tomcat7[4983]:  * no JDK or JRE found - please set JAVA_HOME

then do the next steps

nano  /etc/default/tomcat7
add this line
JAVA_HOME=/usr/lib/jvm/java-8-oracle

change default tomcat port using the next command
nano /etc/tomcat7/server.xml

• Search "Connector port" and replace 8080 with any new port

Uninstall

sudo apt-get remove solr-tomcat
sudo apt-get remove solr-jetty 

sudo apt-get remove tomcat7-common

sudo apt autoremove







Install Specific version of Solr

1) Install Java
2) Get the URL from       http://archive.apache.org/dist/lucene/solr/
3) Run the next commands

For Solr version 7.3.0

steps: download the package then extract one file from compressed package then call this file and pass compressed folder as prameter

cd ~
wget http://www-eu.apache.org/dist/lucene/solr/7.3.0/solr-7.3.0.tgz
tar xzf solr-7.3.0.tgz solr-7.3.0/bin/install_solr_service.sh --strip-components=2
sudo bash ./install_solr_service.sh  solr-7.3.0.tgz




For Solr version 5.3.1

cd ~
wget http://archive.apache.org/dist/lucene/solr/5.3.1/solr-5.3.1.tgz
tar xzf solr-5.3.1.tgz solr-5.3.1/bin/install_solr_service.sh --strip-components=2
sudo chmod +x install_solr_service.sh
sudo ./install_solr_service.sh solr-5.3.1.tgz

OR

For Solr version 4.10.4

wget https://archive.apache.org/dist/lucene/solr/4.10.4/solr-4.10.4.tgz
tar -xvf solr-4.10.4.tgz
cp -R solr-4.10.4/example /opt/solr
cd /opt/solr
java -jar start.jar

Solr will be active in the next URL   Open the URL http://your_server_ip:8983/solr

Uninstall via

sudo service solr stop
sudo rm -r /var/solr
sudo rm -r /opt/solr-5.3.1
sudo rm -r /opt/solr
sudo rm /etc/init.d/solr
sudo deluser --remove-home solr
sudo deluser --group solr

Use following commands to Start, Stop and check the status of Solr service.

sudo service solr stop
sudo service solr start
sudo service solr status

Create First Solr Collection

sudo su - solr -c "/opt/solr/bin/solr create -c TestCollection1 -n data_driven_schema_configs"

  

this will create new folder with name TestCollection1  in the path /var/solr/data


For more information check https://www.howtoforge.com/tutorial/how-to-install-and-configure-solr-on-ubuntu-1604/




Upgrade old Solr version

use the next script     https://github.com/cominvent/solr-tools/tree/master/upgradeindex

Usage:

Script to Upgrade old indices from 3.x -> 4.x -> 5.x -> 6.x format, 
so it can be used with Solr 6.x or 7.x
Usage: ./upgradeindex.sh [-s] [-t target-ver] <indexdata-root>

Example: ./upgradeindex.sh -s -t 6 /opt/solr

Solr upgradeindex
https://github.com/cradules/bash_scripts/tree/master/solr-tools/upgradeindex
https://github.com/cominvent/solr-tools/tree/master/upgradeindex


Importing/Indexing database (MySQL or SQL Server) in Solr using Data Import Handler
https://gist.github.com/maxivak/3e3ee1fca32f3949f052