How to change file case sensitivity?

In Linux, you cannot directly change the case sensitivity of a file or directory. The case sensitivity is a fundamental characteristic of the file system. However, you can rename a file or directory to change its case. Here’s how you can do it:

Rename a file to change its case: If you want to change example.txt to Example.txt, you can use the mv command:
```
mv example.txt Example.txt
```
If you want to change the case of a file name without losing the original name (for example, from example.txt to EXAMPLE.txt), you can do it in two steps:
```
mv example.txt temp.txt
mv temp.txt EXAMPLE.txt
```

This method effectively allows you to change the case of a file name in a case-sensitive file system.