Initial commit.

Initial commit.

These files were created 2015 and orginally contained only the
material that was used for the Unix courses held back then at the
MPI for development biology in Tübingen.

Over time, more content was added and existing contents have been
improved. Development was tracked within the non-public "user-info"
git repository that also contains unrelated contents for internal
use within the institute.

In 2019-12 the title was changed to "Advanced Problems in the Linux
Environment" and the pages were made public. To give interested
readers access to the source code, contents were moved to a dedicated
repository that was made public in 2020-01.

No attempts were made to filter out the 269 commits of the user-info
repo that touched the files of the unix course.