10 example of using Vim or VI editor in UNIX and Linux

Vim or VI editor tutorial in UNIX 
VI Editor is like notepad in UNIX but it’s extremely powerful and has a sophisticated feature to work as complete IDE. No matter which version of UNIX you are working or which flavor you are using you always find either VI editors or VIM there. VI is a very large topic and I am not covering every aspect of it what I am sharing here is some examples of using VI editor in UNIX or Linux. most of the time we use only 10% of VI editor and never know 90% of it, to be frank, I also don't know many of VI features by heart but I always search for it, see people working in VI and learn from their experience as well.
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