http://qs321.pair.com?node_id=859975


in reply to Re^4: (Help Needed) Uninstall Perl 5.10 and Install 5.8 on Ubuntu 10.04
in thread (Help Needed) Uninstall Perl 5.10 and Install 5.8 on Ubuntu 10.04

You've not run the perl executable for your version, you're still running the version of perl installed with Ubuntu (showing up via the which perl command). Rather than run the command you've changed into the bin directory of your 5.12.2 install and run the 5.10.1 perl executable. Try running the following (exactly):

/opt/perl-5.12.2/bin/perl -V

Update: removed leading . character in the example.