I  have  an USB stick with Arch Linux on it. From time to time, I boot
 my machine using this stick in order to do a system update.

 I just realized I can do this:

   1   $ sudo qemu-system-x86_64 -enable-kvm -cpu host -m 2048 -smp 4 -drive file=/dev/sdc,format=raw

 No need to shut down my running system.


                          ____________________


 For a very long time, I used tabs to indent code.  About  three  years
 ago, I switched to "indent with tabs, align with spaces"[1].

 What's  the  benefit  of using tabs? I don't know. I see no benefit in
 using them anymore. Today's editors are very  well  capable  of  using
 "smart  tabs":  Press  the tab key, but insert spaces; press backspace
 once, but delete as many spaces as  needed  to  get  to  the  previous
 indentation level.

 Plus,  when  you use only spaces, your code looks the same everywhere.
 See, I was using tabs to indent code together with a line length limit
 of  80  characters  -- but my Vim was configured with a tab width of 4
 (because the default of 8 looks horrible), which made no sense at all.

 Now that I'm using only spaces, there's no ambiguity anymore.

 (Took me a long time to figure that out. Hum.)

 ____________________

 1. http://vim.wikia.com/wiki/Indent_with_tabs,_align_with_spaces

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