Ferdinand Keil's

electronic notes

Articles in the "Today I Learned" category

Apr 09, 2020

Apr 06, 2020

Enabling the Watchdog on a Raspberry Pi

To increase the reliability of embedded systems - especially ones that are hard to physically access - one can use an embedded watchdog. The watchdog, once activated, will reset the system if it is not fed for a certain time-interval. This guarantees a clean reset in case the system ends up in …

Mär 22, 2020

Missing Kernel Header when installing VBox-Guest Extensions on CentOS

When installing the VirtualBox guest-extensions on a fresh CentOS installation the installer asks for the kernel headers to compile the necessary modules. To install these just type:

yum install kernel-devel kernel-headers

Here is the important part: when the installer for the guest-extensions keeps complaining that The headers for the current …

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