hi my friend ,when i run the command "apt-get install libdb4.8-dev libdb4.8++-dev" on step "Install Required Packages",it show me this massage :
root@eth:~# apt-get install libdb4.8-dev libdb4.8++-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libdb4.8++-dev 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 libdb4.8-dev 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 'libdb4.8-dev' has no installation candidate
E: Package 'libdb4.8++-dev' has no installation candidate
root@eth:~#
it is mean i can't install the Packages?
I am on Ubuntu 16.04.3 LTS (GNU/Linux 4.4.0-87-generic x86_64)