How to uninstall Solr

I have found the following definitions in install_solr_service.sh

• SOLR_EXTRACT_DIR=/opt
• SOLR_SERVICE=solr
• SOLR_VAR_DIR=/var/$SOLR_SERVICE –>>>– /var/solr
• SOLR_USER=solr
• SOLR_INSTALL_DIR=$SOLR_EXTRACT_DIR/$SOLR_DIR –>>>– /opt/solr-5.3.1
• SOLR_DIR=${SOLR_INSTALL_FILE%.tgz}
• SOLR_INSTALL_FILE=${SOLR_ARCHIVE##*/}
• SOLR_ARCHIVE=$1 –>>>– solr-5.3.1.tgz
• ln -s $SOLR_INSTALL_DIR $SOLR_EXTRACT_DIR/$SOLR_SERVICE
• cp $SOLR_INSTALL_DIR/bin/init.d/solr /etc/init.d/$SOLR_SERVICE

therefore

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
sudo update-rc.d -f solr remove
sudo rm -rf /etc/default/solr.in.sh

and check the commands above twice before executing. One wrong space and you can reinstall your system.