First, you have to find out where the password locates.
https://gist.github.com/mrmichalis/5984131
I ran these on which Cloudera Manager locates.
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cat /var/lib/cloudera-scm-server-db/data/generated_password.txt; cat /etc/cloudera-scm-server/db*.properties | sed '/^#/ d'; |
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# cat /var/lib/cloudera-scm-server-db/data/generated_password.txt; MyP4ssw0rd The password above was generated by /usr/share/cmf/bin/initialize_embedded_db.sh (part of the cloudera-manager-server-db package) and is the password for the user 'cloudera-scm' for the database in the current directory. Generated at 20140101-000000. |
The cloudera-scm is the superuser.
And the first line in that file is the password.
To drop a database, dropdb is the command:
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# dropdb --help dropdb removes a PostgreSQL database. Usage: dropdb [OPTION]... DBNAME Options: -e, --echo show the commands being sent to the server -i, --interactive prompt before deleting anything --help show this help, then exit --version output version information, then exit Connection options: -h, --host=HOSTNAME database server host or socket directory -p, --port=PORT database server port -U, --username=USERNAME user name to connect as -w, --no-password never prompt for password -W, --password force password prompt Report bugs to <pgsql-bugs@postgresql.org>. |
Commands may like:
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dropdb -U cloudera-scm -p 7432 -h cm.myhost.com DBNAME |
To drop a user, using dropuser:
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# dropuser --help dropuser removes a PostgreSQL role. Usage: dropuser [OPTION]... [ROLENAME] Options: -e, --echo show the commands being sent to the server -i, --interactive prompt before deleting anything --help show this help, then exit --version output version information, then exit Connection options: -h, --host=HOSTNAME database server host or socket directory -p, --port=PORT database server port -U, --username=USERNAME user name to connect as (not the one to drop) -w, --no-password never prompt for password -W, --password force password prompt Report bugs to <pgsql-bugs@postgresql.org>. |
Commands may like:
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dropuser -U cloudera-scm -p 7432 -h cm.myhost.com USERNAME |
Cloudera Manager Drop Database/User on Embedded Postgresql by @sskaje: https://sskaje.me/2014/04/cloudera-manager-drop-databaseuser-embedded-postgresql/
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