perlquestion Xiong (Note: I'm running Ubuntu 9.10 on i386.) I've installed a great many modules from CPAN using <c>sudo cpan</c>. I've installed a great many <c>.deb</c> packages using appropriate methods, some of which seem to contain Perl modules, too. I've also run into a spot of trouble (although I can't swear <c>cpan</c> has a thing to do with it) with conflicts between modules installed from these different sources. (Synaptic itself seems to rely on <c>XML::SAX</c>, for example.) Various forum posts of dubious reliability and a buddy of mine suggest I never install any modules with <c>cpan</c> unless there is no alternative; rather, prefer to install only using Synaptic, <c>apt-get</c>, and friends. What say the Monks? Update: Great comments, thank you. I will leave the system <c>perl</c> and its libraries alone; if I install an application that requires modules, I'll let Synaptic take care of the dependencies. I'll compile a distinct development <c>perl</c> somewhere else and use <c>cpan</c> to install whatever I like there. I'll use the opportunity to consider different compilation flags, too.