Cannot extend the file system after increase eb2 volume size

Question

I have an ec2 instance that has only 1 volume and I just increased the volume from 8G to 16G. 
After modification the volume, I can see the volume is 16GB from the console (volume type is gp2). 
Now I am following the [doc](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/step4-extend-file-system.html) to extend the file system but looks there is no extra volume for me to extend my file system, /dev/xvda1 is the old one.

Filesystem     Type      Size  Used Avail Use% Mounted on
udev           devtmpfs  478M     0  478M   0% /dev
tmpfs          tmpfs      98M  516K   98M   1% /run
/dev/xvda1     ext4      7.7G  6.4G  897M  88% /
tmpfs          tmpfs     488M     0  488M   0% /dev/shm
tmpfs          tmpfs     5.0M     0  5.0M   0% /run/lock
/dev/xvda15    vfat      124M   11M  114M   9% /boot/efi
tmpfs          tmpfs      98M     0   98M   0% /run/user/1000

Steve_M · Answer

You need to amend the partition table for the underlying disk, basically Linux thinks that the end of the disk is 8GB after the start, this needs to be updated so that the at 16GB (it's more convoluted, but that's the gist of it). The tool to use for this bit would be `fdisk`, `gparted` or `growpart` (whichever you are most comfortable with using).

After that, use `resize2fs` to grow the **ext4** filesystem (for reference, if the filesystem is **xfs** the command would be `xfs_growsfs`).

Full details of all of these steps are here https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/recognize-expanded-volume-linux.html

Gabriel Taiwo Olaleye · Answer

If you have successfully resized the EBS volume attached to your EC2 instance, You need to extend the file system on the instance to utilize the additional space that you've gained.

Try the below:

1. **Check the Current File System**: Before extending the file system, it's good to check the current state. You've done that in your provided output. The current file system is mounted on `/dev/xvda1` and is of type `ext4`.

2. **Resize the File System**: You can use the `resize2fs` command to resize the ext4 file system to take advantage of the newly added space. Replace `/dev/xvda1` with your actual file system device name.

```bash
   sudo resize2fs /dev/xvda1
   ```

This command will automatically extend the file system to utilize the entire available space on the volume.

3. **Verify the Result**: After running the resize command, you can check the new size of your file system:

```bash
   df -h
   ```

The output should show that your root partition (`/`) now has more available space.

Your system should now be using the full 16GB of your EBS volume. Keep in mind that these steps assume you're using a Linux-based operating system, specifically an ext4 file system. If you're using a different file system or operating system, the steps might vary slightly. Always make sure to have a backup of your important data before performing these kinds of operations, just in case.

Additionally, for Windows-based instances or other file system types, the process would be different. If that's the case, please provide more information, and I can guide you accordingly.

Cannot extend the file system after increase eb2 volume size

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