cat <<'EOT'> /opt/perl/perl_profile.sh
#!/bin/sh

PERL_VER=5.10.1
export PERL_VER

PERL_BASE=/opt/perl
export PERL_BASE

PERL_HOME=$PERL_BASE/current
export PERL_HOME

# ensure that the local perl is at the front of the path, but don't
# add it again if it is already there.
( echo $PATH | grep "^$PERL_HOME" > /dev/null ) || PATH=$PERL_HOME/bin:$PATH
export PATH

EOT

chmod 755 /opt/perl/perl_profile.sh