SysAdmin

A quick reference for using getent to verify how your Linux system resolves hostnames, short names, and IP addresses through the full NSS chain.

A quick procedure for resolving Cloudera Manager agent failures caused by corrupted system alternatives entries, including the exact commands to stop the agent, purge stale alternatives, and restart cleanly.

A quick reference for updating a Cloudera Manager license through the REST API using a single curl command, including the required headers and authentication.

Cloudera Manager raises a timezone mismatch alert when the OS clock files disagree with the timezone CM expects. This post walks through the three key files to check and how to align them.

A quick two-step check to confirm the Kerberos key version number in your KDC database matches the value stored in a local keytab file. Mismatched KVNO values are a common cause of authentication failures in Hadoop and other Kerberized services.

Hue does not provide a built-in UI option to remove user accounts. This workaround uses the Hue Django shell to delete one or more users directly from the database, with a clear caveat that the process is unsupported.