1.4. Changing files
Changing files in your running VM
In the previous chapter, we gained access to the VM’s console. In this chapter, we will use this access to make a change to our running VM and observe what happens if we restart the VM.
Task 1.4.1: Create a file
Connect to your VM’s web console.
Login with the specified credentials and create a file:
touch myfile
Verify that the file really is present. Check it with:
stat myfile
Task 1.4.2: Restart VM
Exit the console and restart your VM.
Task 1.4.3: Persistency check
Ask yourself:
- After restarting, is the created file still present?
- And why do you think so?
Try to find out!
Task hint
Connect to your VM’s web console once again.
Check the file status with:
stat myfile
The output fill be:
stat: can't stat 'myfile': No such file or directory
This means that the file is gone. But why?
Do you remember that the VM manifest contains a container disk as volume? A container disk is always ephemeral and is therefore an easy way to provide a disk which does not have to be persistent.