Sometimes, you may find that Forge was unable to perform an operation on your server because there is no free disk spaces available. This is often caused by one or two large files that can be removed; however, locating these files is sometimes tricky.
To find large files on your server, you may use `ncdu` to navigate around common directories on our server. As the `root` user, you should `cd /` and run `ncdu`. The command will scan the directory and its children. Once it’s done scanning you will see a list of directories and their sizes.
![The ncdu interface](https://laravel-blog-assets.s3.amazonaws.com/tBDGhHSzMlQ4dypZBsPYiFVT8adJV98JunTPKrKG.png “The ncdu interface”)
> Notice at the bottom of the terminal window we’re also shown total disk usage, apparent size, and the number of items.
To navigate the interface we can use the up and down arrows to select a directory, then right (or return) to enter the directory, and left to move back up.
In the screenshot above we can see that the server’s `/var` directory is the largest directory at 2.0 GiB. Let’s move into that directory by hitting return.
![Switching directory](https://laravel-blog-assets.s3.amazonaws.com/ro5tveM7VYMPnaIXutfbPiSCtAtoA3UnrJzuXsTB.png “Switching directory”)
We’re now shown all of the files and directories within `/var` ordered by size. Next, we’ll move into the `log` directory as it’s looking bigger than the rest.
![The /var/log directory](https://laravel-blog-assets.s3.amazonaws.com/HghQzalMb3YkKEX6vItBCIr7LZy5byeHJiN7bltg.png “The /var/log directory”)
The `/var/log/journal` directory is the biggest. It’s safe to delete files within this directory **but do not delete the directory itself**.
To delete a file, first select it using the arrow keys and then press `d`. You’ll be asked to confirm that you want to delete the file.
![Deleting a file](https://laravel-blog-assets.s3.amazonaws.com/6KrGJ8OUKeOxpY0eSRVMzMoLfX4Y2PLWkN4Cgk09.png “Deleting a file”)
If your log directory is small in size and you’re still seeing errors related to disk usage, you may also want to navigate to the `/home/forge` directory.
When Forge executes an action on your server it first uploads a script to your server. You can find these script files in directories such as `/root/.forge` and `/home/forge/.forge`. When the script is executed, Forge will pipe and store the output to a `.output` file.
> Forge configures your server to periodically remove these files to save disk space automatically.
Sometimes it may be necessary to remove these `.output` files earlier than the scheduled clean up. Thankfully, `ncdu` makes this really easy to do.