Having used Koha in my MLS, I am interested in downloading Koha for my library. However, on every attempt I come across a different problem. The latest problem is when I enter the command wget -O- https://debian.koha-community.org/koha/gpg.asc | sudo apt-key add – I get the result -bash: wget: command not found E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation So to install the gnupgs I enter the following sudo apt install gnupg gnupg1 gnupg2 I get the result Reading package lists... Done Building dependency tree Reading state information... Done Package gnupg is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source Package gnupg2 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source However the following packages replace it: gpgv Package gnupg1 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'gnupg' has no installation candidate E: Package 'gnupg1' has no installation candidate E: Package 'gnupg2' has no installation candidate What has gone wrong here? I am new to the language of Linux so can instructions be written simply please -- This email has been checked for viruses by AVG. https://www.avg.com