Install JAVA

sudo apt-get install openjdk-11-jdk

Varify the installation

java -version

If the installation is successful then you'll get a response openjdk version "11.0.16"... like this.

Download solr into your system

wget https://archive.apache.org/dist/lucene/solr/8.9.0/solr-8.9.0.tgz

Extract the tarball file (.tgz)

tar xzf solr-8.9.0.tgz solr-8.9.0/bin/install_solr_service.sh --strip-components=2

Install solr 8.9.0

sudo bash ./install_solr_service.sh solr-8.9.0.tgz

stop, start, restart and check status

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

Use start command to initiate solr. Then go to the following URL

http://localhost:8983/

If you see a page like this then solr is installed into your linux system successfully.