title: how to set LD_LIBRARY_PATH in ubuntu 11.04
body: <p>i have seen many links for LD_LIBRARY_PATH but dont able to get a exact way for LD_LIBRARY_PATH. 
  i used ldd (for dynamic libraries) there i need     </p>
  
  <pre><code>linux-gate.so.1 =&gt;  (0x00f84000)
  libcrypto.so.0.9.8 =&gt; /lib/libcrypto.so.0.9.8 (0x0018c000)
  libxml2.so.2 =&gt; /usr/local/lib/libxml2.so.2 (0x00318000)
  libxmlsec1.so.1 =&gt; /usr/local/lib/libxmlsec1.so.1 (0x00caa000)
  libprotobuf-c.so.0 =&gt; /usr/local/lib/libprotobuf-c.so.0 (0x00957000)
  libm.so.6 =&gt; /lib/i386-linux-gnu/libm.so.6 (0x00110000)
  libc.so.6 =&gt; /lib/i386-linux-gnu/libc.so.6 (0x009cc000)
  libdl.so.2 =&gt; /lib/i386-linux-gnu/libdl.so.2 (0x00136000)
  libz.so.1 =&gt; /lib/i386-linux-gnu/libz.so.1 (0x00b89000)
  libxslt.so.1 =&gt; /usr/local/lib/libxslt.so.1 (0x0013a000)
  librt.so.1 =&gt; /lib/i386-linux-gnu/librt.so.1 (0x00172000)
  libltdl.so.7 =&gt; /usr/lib/libltdl.so.7 (0x0017b000)
  /lib/ld-linux.so.2 (0x007d1000)
  libpthread.so.0 =&gt; /lib/i386-linux-gnu/libpthread.so.0 (0x00d6a000)
  </code></pre>
  
  <p>please tell the exact way and where i have to defined with path.</p>