If you're trying to run some perl related script, but get this error
Can't locate LWP/UserAgent.pm in @INC ...
then you'll need to install libwww-perl. To do that, type:
wget http://www.cpan.org/modules/by-module/LWP/libwww-perl-5.832.tar.gz tar xvzf libwww-perl-5.832.tar.gz cd libwww-perl-5.832 perl Makefile.PL make make install