did you download openJDK 10 as the instruction says? and where did you extract it?
same question goes to the Java FAF client. where did you extract it?
but there is no such file, I wrote:
sudo chmod +x ./natives/faf-uid
you are getting this error because there is no such file in that directory. : p
there is a cd command in the wiki too before that. it goes to the directory where you extracted the FAF client (you might have different directories).
i have updated the wiki about the "natives" subdirectory.
it doesn't matter what kind of JDK is on your system btw. you need the JDK10 extracted to some directory. then you store that directory path in the INSTALL4J_JAVA_HOME variable. then the FAF client will use that JDK.
does this directory exist for you? ~/Games/javaFafClient/jdk-10.0.2