➜ ~ sudo apt-get install mariadb-server
sudo: unable to resolve host ip-172-30-0-61
Reading package lists... Done
Building dependency tree
Reading state information... Done
mariadb-server is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 89 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n]
Setting up mariadb-server-5.5 (5.5.59-1ubuntu0.14.04.1) ...
dpkg: error processing package mariadb-server-5.5 (--configure):