<font face="Arial, Verdana">If I call </font>
<font face="Arial, Verdana">ldd /usr/local/Repetier-Server/bin/RepetierServer</font>
<font face="Arial, Verdana">
</font>
<font face="Arial, Verdana">i get</font>
<font face="Arial, Verdana"> linux-vdso.so.1 => (0x00007ffc993c0000)</font>
<font face="Arial, Verdana"> librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fa33d540000)</font>
<font face="Arial, Verdana"> libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fa33d320000)</font>
<font face="Arial, Verdana"> libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fa33d118000)</font>
<font face="Arial, Verdana"> libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fa33ce10000)</font>
<font face="Arial, Verdana"> libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fa33cb88000)</font>
<font face="Arial, Verdana"> libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fa33c970000)</font>
<font face="Arial, Verdana"> libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fa33c5e0000)</font>
<font face="Arial, Verdana"> /lib64/ld-linux-x86-64.so.2 (0x00007fa33d748000)</font>
showing which libraries the server uses and where it finds them. Try this with your linux and check if that file is there and readable for everyone.