I got this message today while trying to run sa-update command:
venus:/var/qmail/bin# sa-update Can't locate LWP/UserAgent.pm in @INC (@INC contains: /usr/local/share/perl/5.10.0 /etc/perl /usr/local/lib/perl/5.10.0 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/local/lib/site_perl) at /usr/local/bin/sa-update line 79. BEGIN failed--compilation aborted at /usr/local/bin/sa-update line 79.
The solution is to install the package libwww-perl.