The description below uses $CATALINA_HOME to refer the
      base Tomcat directory. It is the directory in which you installed
      Tomcat, for example C:\tomcat8, or
      /usr/share/tomcat8.
    
      The Host Manager application requires a user with one of the following
      roles:
    
    
      - 
        admin-gui- use this role for the graphical web interface.
- 
        admin-script- use this role for the scripting web interface.
      To enable access to the HTML interface of the Host Manager application,
      either grant your Tomcat user the appropriate role, or create a new one with
      the correct role. For example, open
      ${CATALINA_BASE}/conf/tomcat-users.xml and enter the following:
    
    <user username="test" password="chang3m3N#w" roles="admin-gui"/>
      No further settings is needed. When you now access
      {server}:{port}/host-manager/html,you are able to
      log in with the created credentials.
    
    
      Note that in case you retrieve your users using the
      DataSourceRealm, JDBCRealm, or
      JNDIRealm mechanism, add the appropriate role in the database
      or the directory server respectively.