title: How to increase/check default memory Docker has on Linux?
body: <p>I've seen that on Windows and Mac it's very easy to change the RAM containers are given - you just go into the GUI. But how do you do this on Linux, where it's a CLI instead of a GUI?</p>
  <p>The Docker docs mention an <code>-m</code> flag, but this flag doesn't give any response (just prints the entirety of the help output again) so I don't know whether it worked. It also seems specific to containers, whereas I'd like to change the global default.</p>
  <p>Lastly, is there a way to check the current default RAM, so I can make sure whatever I do in the end actually worked?</p>