Trying to launch a program. I get the error as follows:
./theforgottenserver: error while loading shared libraries: libmysqlclient.so.16: cannot open shared object file: No such file or directory
I have libmysqlclient.so.15 in the /usr/lib64 directory. So the file is there, i even put it in the programs directory that I am trying to launch.
According to Ubuntu manual:
ldconfig creates, updates, and removes the necessary links and cache (for use by the run-time linker, ld.so) to the most recent shared libraries found in the directories specified on the command line, in the file /etc/ld.so.conf, and in the trusted directories (/usr/lib and /lib).
In your case, verify if /usr/lib64 is present in /etc/ld.so.conf, and if it is, exec:
sudo ldconfig
If /usr/lib64 is not present in ld.so.conf, you can follow this as example on how to add your custom directory and update link loader.
