rename - renames multiple files

shell> brew install rename
shell> rename 's/\.bak$//' *.bak
shell> rename 'y/A-Z/a-z/' *

shell> rename IMG img *.jpg
shell> rename .html .htm *.html

shell> rename 's/$/.sh/' filename
shell> rename 's/$/.bak/' filename

shell> rename --keep-extension --expr '$_ = "NewName"' OldName.txt

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• rename