ops - Perl pragma to restrict unsafe operations when compiling
perl -Mops=:default ... # only allow reasonably safe operations
perl -M-ops=system ... # disable the 'system' opcode
Since the ops pragma currently has an irreversible global effect, it is only of significant practical use with the -M option on the command line.
See the Opcode module for information about opcodes, optags, opmasks and important information about safety.
Opcode, Safe, perlrun
To install utf8, copy and paste the appropriate command in to your terminal.
perl -MCPAN -e shell
For more information on module installation, please visit the detailed CPAN module installation guide.