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Solution for vboxconfig SSL error:02001002:system library:fopen:No such file or directory:

When a new kernel is installed and used, vboxconfig cannot compile the vbox drivers again. The solution is simple, but "you have to know".


Apache2 on Ubuntu 12.04 Basic Auth: password mismatch

The default instructions to have basic http authentication failed on Ubuntu 12.04 Precise Pangolin. The reason seems to be that the htpasswd tool produces MD5 hashes by default, while the default apache2 installation on Ubuntu 12.04 expects SHA1 hashes. The symptoms are that login attempts always result in password mismatch:

[Fri Aug 17 13:45:52 2012] [error] [client] user admin: authentication failure for "/": Password Mismatch, referer: http://localhost/login/


Mounting a disk image file with partitions

In Linux you can easily make a backup of a whole disk, including MBR (partition table) and different types of filesystems with dd. While this is very useful, how can you access individual partitions later without "extracting" them from the image? "kpartx" is the command you need.

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