libmysqlclient.so.18: cannot open shared object file: No such file or directory
Solution 1:
On CentOS 7, libmysqlclient.so.18 is in the package mariadb-libs so check if that package is installed and if not:
yum install mariadb-libs
On CentOS 7, libmysqlclient.so.18 is in the package mariadb-libs so check if that package is installed and if not:
yum install mariadb-libs