Need Code or Guidance on Rename files even any no. of files present in particular directory(including more than thousands of files) using Unix Shell Script

 Consider particular directory contain n no. of input files. Rename each input files which available in particular directory with  provided new file name.

Example: 

Rename file from Old FileName to New FileName Details:

Input Files in Particular Directory:

Output as per new file name:

If interest or Need Unix Shell Script or guidance on How to Rename files even any no. of files present in particular directory (including more than thousands of files).

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