$ sudo yum install epel-release

Now, create the CouchDB repository files using below command:

$ sudo vim /etc/yum.repos.d/bintray-apache-couchdb-rpm.repo

[bintray--apache-couchdb-rpm]
name=bintray--apache-couchdb-rpm
baseurl=http://apache.bintray.com/couchdb-rpm/el$releasever/$basearch/
gpgcheck=0
repo_gpgcheck=0
enabled=1

$ sudo yum update
$ sudo yum install couchdb

After Completing the installation of CouchDB, you can enable and run the CouchDB service using following command:

$ sudo systemctl start couchdb
$ sudo systemctl enable couchdb

$ sudo vim /opt/couchdb/etc/local.ini

/opt/couchdb/etc/local.ini

[admins]
admin = mysecretpassword

Use the same above formate to create as many admin account and restart the couchdb service to apply these settings.

$ sudo systemctl restart couchdb

To create system databases “_users”, “_replicator” and “_global_changes”, using curl command as shown below:

$ curl -u ADMINUSER:PASS -X PUT http://127.0.0.1:5984/_users
$ curl -u ADMINUSER:PASS -X PUT http://127.0.0.1:5984/_replicator
$ curl -u ADMINUSER:PASS -X PUT http://127.0.0.1:5984/_global_changes

After successful creation of database, you will get the output like:

{"ok":true}

$ curl http://127.0.0.1:5984/

The output will look like below format:

{
   "couchdb":"Welcome",
   "version":"2.3.1",
   "git_sha":"c298091a4",
   "uuid":"370903b5400643c2979838f5b68348c1",
   "features":[
      "pluggable-storage-engines",
      "scheduler"
   ],
   "vendor":{
      "name":"The Apache Software Foundation"
   }
}

You can verify CouchDB installation on GUI also by access the IP address on the browser, as shown below:

http://127.0.0.1:5984/_utils/