Exception: error while loading shared libraries: libmysqlclient.so.20: cannot open shared object file: No such file or directory
Solution:

# find/ -name 'libmysqlclient*'
/usr/local/mysql/lib/libmysqlclient.a
/usr/local/mysql/lib/libmysqlclient.so.20.3.10
/usr/local/mysql/lib/libmysqlclient.so
/usr/local/mysql/lib/libmysqlclient.so.20
/usr/lib64/mysql/libmysqlclient.so.18
/usr/lib64/mysql/libmysqlclient.so.18.0.0

# ln -s /usr/local/mysql/lib/libmysqlclient.so.20 /usr/local/lib/libmysqlclient.so.20
# vim /etc/ld.so.conf
/usr/local/lib				#Write
# ldconfig -v