Use a Linux shell script to change the lowercase letters in the file contents of all files below the directory to uppercase

In the recent work, the product group of colleagues to give the data are all lowercase letters, but the engine team colleagues asked them to get from the data inside the structure of the analysis is all capitalized structure, which makes our data preprocessing group is very awkward Ah, so in writing a script like this, before parsing the data, First use the shell script to process the data again ...

Use a Linux shell script to change the lowercase letters in the file contents of all files below the directory to uppercase