How to change default text editor in Linux

​sudo update-alternatives --config editor

Note:NANO is the default text editor. Prefer to have vim.

For example:

There are 4 choices for the alternative editor (providing /usr/bin/editor).

  Selection    Path                Priority   Status
------------------------------------------------------------
  0            /bin/nano                   40        auto mode
  1            /bin/ed                    -100        manual mode
  2            /bin/nano                   40        manual mode
* 3            /usr/bin/vim.basic     30         manual mode
  4            /usr/bin/vim.tiny       10         manual mode

Press <enter> to keep the current choice[*], or type selection number: ​