Monthly Archives: January 2010

Posted on January 18, 2010 by Ahmed Tawfik

How to unset environment variables in Bash use the keyword unset :), that’s it!

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Change display resolution in Redhat 5 or Oracle Enterprise Linux 5

Posted on January 9, 2010 by Ahmed Tawfik

Edit your “/etc/X11/xorg.conf” file, add the “Modes” part under subsection “Display” where the first mode – which is 1024×768 in the example below – will be the default one: Section “Screen”        Identifier “Screen0”        Device  … Continue reading →

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Temporary workaround for virtualbox not able to unmount CD/DVD drive or ISO image

Posted on January 8, 2010 by Ahmed Tawfik

Just don’t use  a dynamic expanding harddisk and the problem is gone!!

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Regenerate Database Console Repository

Posted on January 6, 2010 by Ahmed Tawfik

This is needed in case you misconfigured your Database console, you should rebuild it by doing the following: Drop it: “emca -deconfig dbcontrol db -repos drop“ Recreate it: “emca -config dbcontrol db -repos create” That’s it, should be fine now … Continue reading →

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How to solve the problems of "Oracle Enterprise Linux" in virtualbox

Posted on January 6, 2010 by Ahmed Tawfik

Not able to boot: Just press escape during the grub loading process and choose the second kernel :), that’s it! If you want it to be persistent to avoid doing that at every startup, just go edit the “/boot/grub/grub.conf” and … Continue reading →

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