BTW:
`vi(1)` also has an __"ex-mode"__ which is sort of a builtin `ed(1)`.

I study and practice `ed(1)` to be hip, to learn `vi(1)`'s `ex` and __REGEX__-es.

Learning `ed(1)` is like learning Latin/Old Greek because it's ancient and "used everywhere" - both availability (even when all else fails) and that it's influence can be felt "everywhere".
Another bonus will be the ability to run `edbrowse(1)` efficiently!
@mwlucas has a great book called "ED MASTERY".
#ed1 #edmastery #beyondflamewars