rename

Rename a file or group of files with a regular expression. WARNING: This command will overwrite files without prompting unless the dry-run option is used. Note: This page refers to the Perl version, also known as file-rename. More information: https://manned.org/prename.

Replace from with to in the filenames of the specified files:

rename 's/{{from}}/{{to}}/' {{*.txt}}

Dry-run - display which changes would occur without performing them:

rename -n 's/{{from}}/{{to}}/' {{*.txt}}

Change the extension:

rename 's/\.old$/\.new/' {{*.txt}}

Change to lowercase (use -f in case-insensitive filesystems):

rename {{[-f|--force]}} 'y/A-Z/a-z/' {{*.txt}}

Capitalize first letter of every word in the name:

rename {{[-f|--force]}} 's/\b(\w)/\U$1/g' {{*.txt}}

Replace spaces with underscores:

rename 's/\s+/_/g' {{*.txt}}

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rename

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