I am new to DigitalOcean, Linux and libraries, and deeply appreciate any help from you on the following issue: I have been trying to make a native library work (libjsmile.so) in a web application with Apache Tomcat 7 on a Linux CentOS 7 DigitalOcean server, but I still haven’t succeeded. I was able to use this wrapper library (libjsmile.jnilib) as a Java application or a web application with Apache Tomcat 7 on a Mac. And I was able to load libjsmile.so as a Java application on this CentOS 7 server. The error starts to occur when I want to load libjsmile.so in a web application with Apache Tomcat 7 in this CentOS 7 server. I have tried to add LD_LIBRARY_PATH=“/usr/share/java/tomcat” and/or JAVA_OPTS=“-Djava.library.path=/usr/share/java/tomcat” to the Tomcat configuration file (tomcat.conf) and put the libjsmile.so inside that path. I have also tried to use System.loadLibrary(“jsmile”); or System.load(“/usr/share/java/tomcat/libjsmile.so”); Although some of the above methods could work in a Java application on the CentOS7 server, none of them work when I change to a web application using apache tomcat 7 on the CentOS7 server. It either gives the following error: java.lang.UnsatisfiedLinkError: smile.Wrapper.nativeStaticInit() Or just hang there (keep waiting for a response). Thanks a lot for any of your suggestions!