From LXF Wiki

In Linux land, "free" has three main meanings:

  • Free as in speech. In GNU/Linux and other Free software systems, "Free" is regarded as the freedom to share, modify and use software as you wish -- providing you give others that same freedom.
  • Free as in beer. People often think that "free software" means that you can download and use it without paying. This is usually true of free software, but it is also true of a lot of closed-source or closed-license software, such as many graphic card drivers. And if you want your free software any other way, say on a CD or complete with a printed user guide and helpline, you will usually have to pay.
  • Free space is the space left unused on a storage device or medium. free is an associated Linux shell command, see below:



free is a shell command that displays the total amount of free and used physical and swap memory in the system, as well as the buffers used by the kernel.


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