im following this guide which is posted by mr.alex to Install xibo cms (1.8) on Ubuntu.
1.8 installation guide
im encountering the following error when i run the command “sudo apt-get -y install docker-ce” (the bold ones) :
Reading package lists… Done
Building dependency tree
Reading state information… Done
Package docker-ce 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 ‘docker-ce’ has no installation candidate
what’s the problem? im a complete Linux noob and i don’t know what should i do differently.any help would be appreciated.