Oracle: Fixing ORA-01113: file x needs media recovery Error

DisclaimerThe following steps are intended for a quick recovery of the database. Use them at your own risk.SymptomOracle mounts the database, but refuses to open the database with an ORA-01113: file x needs media recovery Error.% sqlplus / as sysdbaSQL*Plus: Release 10.2.0.1.0 - Production on Mon Sep 24 09:29:10 2007Copyright (c) 1982, 2005, Oracle. All rights reserved.Connected to an idle instance.SQL> startupORACLE instance started.Total System...

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Sun Secure Global Desktop (Tarantella)

How do you like launching some of the applications running on a system, securely using a web browser?Consider this simple scenario.You have a system that is exposed to the internet. You are trying to get your partner engineer access your system {say using telnet or ssh}; but the partner engineer is not able to access it due to their corporate firewall.One option for the partner engineer is to bypass their company's firewall somehow, then connect...

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*nix: Workaround to cannot find zipfile directory in one of file.zip or file.zip.zip ..

Symptom:You are trying to extract the archived files off of a huge (any file with size > 2 GB or 4GB, depending on the OS) ZIP file with unzip utility on Solaris, and it fails with the following error:cannot find zipfile directory in one of file.zip or file.zip.zip, and cannot find file.zip.ZIP, period.% ls -lh file.zip-rw-r--r-- 1 oracle dba 13G Sep 8 09:46 file.zipzipinfo returns the following message:$ zipinfo file.zip[file.zip]...

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Memory fragmentation / Large Pages on Solaris x86

First, the symptom.On Solaris x86 systems that support large pages (any page size > 4K), the processes may get 2M pages when the system is up for few hours, but may not obtain even a single large page (2M) when the system is up for few days.Now, the explanation.Memory fragmentation is the main reason for the above mentioned behavior on Solaris x86 platform. On Solaris x86, once memory has been fragmented, it is very rare that a large page can...

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Linux: Steps for installing GRUB as the Boot Loader

For some reason if the Master Boot Record (MBR) is overwritten or corrupted, here is a simple HOW-To to install GRUB (GRand Unified Boot loader) as the boot loader with Ubuntu being the host operating system. Boot up Linux using Ubuntu Live CD Run grub with system user privileges% sudo grubPassword:Probing devices to guess BIOS drives. This may take a long time. Locate the grub files on the connected devices.grub> find /boot/grub/stage1 (hd0,0)...

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