rename

Perl-powered batch file renaming utility with regex support

brewmacoslinux

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Perl-powered file rename script with many helpful built-ins

rename

Replace spaces with underscores in filenames$ rename 's/ /_/g' *.txt

Convert filenames to lowercase$ rename 'y/A-Z/a-z/' *

Add prefix to all files with extension change$ rename 's/^/archived_/' *.log