Install libhash-case-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libhash-case-perl
Description:
base class for hashes with key-casing requirements
Hash::Case is the base class for various classes which tie special treatment for the casing of keys. Be aware of the differences in implementation: Lower and Upper are tied native hashes: these hashes have no need for hidden fields or other assisting data structured. A case Preserve hash will actually create three hashes.
Homepage: http://search.cpan.org/dist/Hash-Case/
Version: 1.020-1
Section: universe/perl