repren:tldr:b938e

This command is using the "repren" (repeated replacement) utility with several options and parameters.

• --rename: This option tells the command to rename the files that match the specified patterns.
• --insensitive: This option makes the pattern matching case-insensitive, meaning it will match files regardless of their uppercase or lowercase letters.
• --patterns ${path-to-patfile-ext}: This specifies the pattern file that contains the search and replacement patterns. The ${path-to-patfile-ext} should be replaced with the actual path to the pattern file. This file will contain the patterns to search for and their corresponding replacements.
• *: This is a wildcard character that matches any file in the current directory. It indicates that the command should perform the renaming operation on all files in the current directory.

So, when this command is executed, it will use the "repren" utility to rename files in the current directory based on the patterns specified in the pattern file. The renaming operation will be case-insensitive.