How to verify if filesystem is opened in read-write mode in debugfs ?

Suppose you are in debugfs command line utility to debug some filesystem or file, and want to check:

a. Which filesystem you ae debugging ?
b. And if the filesystem is opened in read/write mode or not ?

So here comes a quick trick.

We can use the params command on debugfs to know the answers to both of the above questions.

debugfs:  params
Open mode: read-write
Filesystem in use: /dev/sda1

In the above output, we can see, the open mode as read-write and the filesystem is /dev/sda1 which is in use.

To know more about debugfs utility click here.

To know how to undelete files using debugfs you can check out this article.

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