Linux: GRUB slow on 4k screens

In case you have a screen with high resolutions, a 4k screen for example, it is possible that GRUB is incredibly slow. If that is the case, the workaround is to edit the /etc/default/grub file, and add/replace the following line…

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Oracle: solving block corruption

Step 1:  If block corruption was found, first find the corrupted blocks: Stzp 2:  Check to which table/index/etc that block belongs to. Step 3:  Resolve the block corruption using RMAN (which is one of the possibilities):  

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