Text Editor: vi
===============

Useful links
------------


* `Colorado State University <https://www.cs.colostate.edu/helpdocs/vi.html>`_
* `University of Washington <https://staff.washington.edu/rells/R110/>`_
* `Cheatography <https://cheatography.com/ericg/cheat-sheets/vi-editor/>`_
* `Youtube Video tutorial <https://www.youtube.com/watch?v=pU2k776i2Zw&ab_channel=Guru99>`_


Cheatsheet
----------

See :download:`this file <UNIX/ericg_vi-editor.pdf>` to download PDF version of cheatsheet.


Useful tools
------------

Search the word "PSC"

* forward search ``:/PSC``
* backward search ``:?PSC``

Add the character "#" for the comment-out from the current line to 10 lines below.

* ``:.,+10 s/^/#/``


Remove the comment-out character "#" from the current line to 10 lines below.

* ``:.,+10 s/^#//``