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• /usr/local/vcl
• /etc/vcl/vcld.conf
• /etc/init.d/vcld 

Download the Backend VCL Code

Download VCL backend code from the Apache Subversion repository and save it to /usr/local/vcl

svn export https://svn.apache.org/repos/asf/incubator/vcl/trunk/managementnode/ /usr/local/vcl/

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How to Install a Perl Module Using CPAN

1. Enter the CPAN shell:
   perl -MCPAN -e shell
2. You will need to configure CPAN if it's the first time it is being run. Enter No at the first prompt to auto-configure the CPAN module.
3. Search for a module using the "m" command:
   m /Zlib/
   You should find the module you were looking for on a line like this:
   Module          Compress::Zlib  (P/PM/PMQS/IO-Compress-2.020.tar.gz)
4. Install the module:
   install Compress::Zlib
5. Answer yes if asked to install any prerequisite modules
   The last line you should see should be:
   /usr/bin/make install  -- OK

How to Test if Required Perl Modules are Installed

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BIN PATH: /usr/local/vcl/lib/VCL
pre-execution: config file being used: /etc/vcl/vcld.conf
Uncaught exception from user code:
        VCLD : /etc/vcl/vcld.conf does not exist, exiting --  No such file or directory
BEGIN failed--compilation aborted at /usr/local/vcl/lib/VCL/utils.pm line 616.
 at /usr/local/vcl/lib/VCL/utils.pm line 616

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