What about creation time?

In Linux, the creation time (also known as birth time) of a file is not as straightforward to modify as access or modification times. Many Linux filesystems do not store the creation time, but if your filesystem does (like ext4), you can view it using the stat command:

stat filename.txt

To change the creation time, you typically cannot do this directly with standard commands like touch. However, you can achieve it by copying the file to a new file, which will have the current time as its creation time. Here's how:

Copy the file:
```
cp filename.txt newfile.txt
```
Optionally, you can then delete the original file and rename the new file back to the original name:
```
rm filename.txt
mv newfile.txt filename.txt
```

This method effectively gives the new file a fresh creation time. Note that this approach may not preserve the original file's metadata (like permissions or ownership), so use it with caution.