$ ${SOLR_ROOT}/bin/solr status
Here's the output of running this command on my localhost where I have 2 Solr instances and 1 ZooKeeper instance.

Found 2 Solr nodes: Solr process 7306 running on port 8984 { "solr_home":"/opt/solr-i2/server/solr", "version":"9.1.1 d998e63978abfedde3b75bab4ba6e1e78ddb5944 - magibney - 2023-01-17 19:58:00", "startTime":"2023-03-05T00:03:29.088Z", "uptime":"0 days, 0 hours, 29 minutes, 33 seconds", "memory":"144.4 MB (%28.2) of 512 MB", "cloud":{ "ZooKeeper":"localhost:2181/solr", "liveNodes":"2", "collections":"0" } } Solr process 7214 running on port 8983 { "solr_home":"/opt/solr-i1/server/solr", "version":"9.1.1 d998e63978abfedde3b75bab4ba6e1e78ddb5944 - magibney - 2023-01-17 19:58:00", "startTime":"2023-03-05T00:03:12.286Z", "uptime":"0 days, 0 hours, 29 minutes, 52 seconds", "memory":"225.9 MB (%44.1) of 512 MB", "cloud":{ "ZooKeeper":"localhost:2181/solr", "liveNodes":"2", "collections":"0" } }