Category Archives: Operating Systems

Ksplice Installation and Configuration

Patching your Linux System can be quite a long drawn affair requiring server, database and application downtime and scheduling this mission critical task can be a nightmare.

Although Linux is very secure and stable, the operating system still needs to be patched at least once every month.

Oracle’s purchase of Ksplice in 2011 brought with it the promise of zero downtime for its users. Ksplice offers a way to patch a Linux kernel without the need to reboot. You no longer have to wait for the weekend or time when there are no/not too many users to patch vulnerabilities and flaws.

How to Enable or Disable Direct Root Login for SSH on GNU / Linux

Security for any Environment;be it an Operating System, Database or Application is a critical business requirement for any Company. As such, many hardware/software providers have built-in a number of security features to help you secure your ‘brand spanking new’ purchase. Many Aftermarket 3rd party tools are readily available as well, some good and others, well, you know the saying…..

Anyway to the task at hand,

Something I’ve come across quite a bit is direct root login access not being disabled on many a Linux environment.

Troubleshooting a RMAN restore reporting missing backup pieces from Netbackup media layer

Troubleshooting missing backup pieces during restore:

The purpose of this procedure is to identify all backuppieces needed for a restore, before attempting a restore, or troubleshooting after a RMAN-10035 error during restore. The reason for going down to backup piece level being that just identifying the media is sometimes not enough. Some instances have been found when some backup pieces on a tape are in the catalog and some not. Thus the media/tape is “loaded” but you still don’t get the backup pieces in the restore. This way you can request storage to reload the tape and ensure all the necessary backup pieces are in the catalog before attempting a restore and wasting time with the well known error RMAN-10035 with associated ORA-19511 eg: