Losing essential files on your Linux system can be highly stressful, whether the reason is a corrupted system, accidental deletion, or a damaged partition. However, the good thing is that there are several Linux tools that can be used for data recovery on the device. The key to successfully recovering your data is to act carefully and quickly, without making the situation worse. The guide will provide you with the correct instructions that will make the recovery process easier for you. 

Step 1: Stop Using the Affected Drive

The first and really most important rule is do not put new data onto the affected drive. When a file gets deleted, its content can still sit on the disk until something new overwrites it. That means installing software, downloading stuff, or saving documents to the same drive can basically destroy data that would otherwise be recoverable. 

If the drive is acting like it’s physically struggling, like repeated clicking or access that’s insanely slow, or you see input/output errors, then don’t keep poking at it over and over.

Step 2: Identify the Drive

Before looking for a Linux recovery software, you need to know which drive is affected. You need to open Terminal and run:

lsblk

This shows disks and partitions that are currently connected. Take a careful look and confirm the correct affected device, because picking the wrong one before running a recovery command can end up causing permanent data loss.

Step 3: Create a Disk Image

For a drive that’s failing or has physical damage, it’s generally safer to make a copy first, then do the recovery process on that copy, instead of repeatedly working on the original. GNU ddrescue is meant to copy data from damaged devices, and it tries to rescue readable areas earlier than the rest. Also, its mapfile can be used so recovery that gets interrupted can continue later.

Example: sudo ddrescue /dev/sdX recovery.img recovery.log

Swap /dev/sdX for the correct source device, and double-check that the destination has enough space. Also, never accidentally use the source drive as the destination.

Step 4: Try TestDisk

If the issue is related to a missing partition or a damaged filesystem layout, TestDisk can be a handy option. TestDisk is the official data recovery software Linux that can recover lost partitions, and it supports multiple common filesystems including ext2, ext3, and ext4.

TestDisk is especially useful if the actual files may still be there, but the partition info has become scrambled or corrupted in some way.

Step 5: Use Dedicated Software for Recovery 

If the file system is highly corrupted, then you can rely on a third-party tool, which searches underlying data for recognizable file patterns. These tools can recover files that are lost even when your system is badly damaged. 

Lastly, you need to save all these recovered files in a different drive from where they were earlier. You can also rely on the website Notchox to learn more about Linux file recovery tools that you can use to recover any kind of file on your Linux system.