The following packages have unmet dependencies:
mysql-community-server : Depends: libaio1 (>= 0.3.93) but it is not installable
Recommends: mysql-client (= 5.6.25-1ubuntu14.10)
E: Unable to correct problems, you have held broken packages.
apt-get install libaio1
$ sudo apt-get install libaio1
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libaio1 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 'libaio1' has no installation candidate