Drive space isn't quite as precious as it was in the early days of computing, but no matter how much space you have, there's always the potential to run out. Computers need a little space just to operate, so it's important to check occasionally to ensure you haven't inadvertently used up literally all the space available on your drive. In the Linux terminal, you can do that with the df command.
The df command displays the amount of disk space available on the file system.
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