Apache Solr install & activate on Debian 12 (Secure Admin with Basic Auth on Port 8983)

Download Solr: 

wget https://dlcdn.apache.org/solr/solr/9.7.0/solr-9.7.0.tgz

https://solr.apache.org/downloads.html.

Install Solr:

tar xzf solr-9.7.0.tgz solr-9.7.0/bin/install_solr_service.sh --strip-components=2
sudo bash ./install_solr_service.sh solr-9.7.0.tgz

Add/uncomment (File: /etc/default/solr.in.sh):

SOLR_JETTY_HOST="0.0.0.0"

0.0.0.0  to allow Solr to accept connections on all network interfaces.

Configure /var/solr/data/security.json :

{
 "authentication":{
   "blockUnknown":true,
   "class":"solr.BasicAuthPlugin",
   "credentials":{
     "solr":"PassWordHashComesHere",
     "mysecondsolruser":"PassWordHashComesHere"},
   "realm":"My Solr users",
   "forwardCredentials":false,
   "":{"v":0}},
 "authorization":{
   "class":"solr.RuleBasedAuthorizationPlugin",
   "permissions":[{
       "name":"security-edit",
       "role":"admin"}],
   "user-role":{"solr":"admin"}
}
}

Restart Solr:

service solr restart 
service solr status

Change Apache Solr Password (default, admin-user 'solr'):

curl --user solr:SolrRocks http://localhost:8983/solr/admin/authentication -H 'Content-type:application/json' -d '{"set-user": {"solr":"MyNewPassword123"}}'