tldr/pages/common/rename.md

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# rename
> Renames multiple files.
- Rename files using a Perl Common Regular Expression (substitute 'foo' with 'bar' wherever found):
`rename {{'s/foo/bar/'}} {{\*}}`
- Dry-run, display which renames would occur without performing them:
`rename -n {{'s/foo/bar/'}} {{\*}}`
- Convert filenames to lower case:
`rename 'y/A-Z/a-z/' {{\*}}`
- Replace whitespace with underscores:
`rename 's/\s+/_/g' {{\*}}`