Azure Linux VM: Command to check on which disk a directory is mounted

Question

We have a Oracle Linux VM which has an OS disk and a Data disk. I want to extend the /var directory by 25GB.
However, I dont know on which of two disks the /var is mounted.

• Is there a command to check?
• How to extend the disk by specific GB?

Answer 1

Hello @Rajesh Swarnkar ,

Thank you for reaching out to the Microsoft Q&A platform. Happy to answer your question.

df -h should be able to show the mount disk. Also, usually /var is just a directory and not a mountpoint. So, wherever the directory / is mounted that is the disk where /var also resides. You just need to expand the volume which contains /

You can also try something like this df -h /var.. But if the /var is not mounted as a mountpoint, then it might not list.

Expanding of disk size can be done using fdisk commands or LVM commands based on the configuration.

Ref: https://learn.microsoft.com/en-us/azure/virtual-machines/linux/expand-disks?tabs=azure-cli%2Cubuntu

Hope this helps.
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