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I have been trying to install Regulatory Sequence Analysis Tools (RSAT) on my stand alone computer. The OS is Ubuntu latest version. I am new to it too. While downloading some necessary PERL modules I get this error:

"Proxy must be specified as absolute URI; '192.168.3.10' is not at /usr/share/perl/5.26/CPAN/FTP.pm line 355. makefiles/install_rsat.mk:256: recipe for target 'perl_modules_install' failed make: * [perl_modules_install] Error 255**"

Tried solving it with "perl -MCPAN -eshell" but same error pops out. Please help me .

Your help will be very appreciated

Mithil Gaikwad
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    It's a web proxy, it requires you to provide a URL. Try `http://192.168.3.10`, possibly with a port. – simbabque Nov 09 '18 at 15:22
  • This might help: https://stackoverflow.com/questions/42649791/cpan-first-launch-proxy-configuration – Tim Nov 09 '18 at 15:43

2 Answers2

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It looks like your CPAN proxy is misconfigured. It should be an absolute URL (as the error message says) not just an IP address. http://192.168.3.10/ will probably work (but you might need to add a port number too).

Do you have any suggestions that would make the error message clearer?

Dave Cross
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I ran into similar issue. Solved it by removing all configured proxies from CPAN and then using environment proxy.

You can remove configured proxies from cpan using following commands either on cpan or perl -MCPAN -e shell -

o conf http_proxy ""
o conf ftp_proxy ""
o conf proxy_user ""
o conf proxy_pass ""
o conf commit
q

And then configure required environment proxy. Example - export http_proxy=http://proxyserver:8080 for Linux or set http_proxy=http://proxyserver:8080 for Windows

Now you should be able to install required modules cpan[6]> install LWP

aunlead
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  • -bash: conf: command not found – Chaminda Bandara Mar 15 '22 at 08:25
  • @ChamindaBandara - looks like you are in bash and not in CPAN's shell. Try commands `cpan` or `perl -MCPAN -e shell` to connect to CPAN's shell. Run the `conf` command after connecting to CPAN shell. – aunlead Apr 05 '22 at 16:09