Can't write to /usr/local/share/perl/5.26.1 and /usr/local/bin
Did you complete the perlbrew setup as instructed?
That seems to be the likely explanation. phoenix007: In addition to adding source ~/perl5/perlbrew/etc/bashrc to your ~/.bashrc file and logging out and back in again, make sure you either perlbrew use perl-5.8.9 (for the current shell only), or perlbrew switch perl-5.8.9 (make it the default for this and all future shells; I wouldn't recommend this though because 5.8.9 is quite old).