Since I started networking, and more specifically working on Cisco equipment, I have been told to use copy running-configuration startup-configuration rather than the far simpler write. Obviously write shorter, it can be abbreviated to two letters; furthermore write does not prompt you afterwards. Compare the two outputs below.
Odin#copy running-config startup-config Destination filename [startup-config]? Building configuration... [OK] Odin#wr Building configuration... [OK]
But for whatever reason I was always told that write was in the process of being deprecated. Now it looks like that is finally happening. At least partially.
If you have a switch with 12.2(58) or later, doing a do write from within configuration mode returns an error. Doing write (as opposed to doing do write) still works. As far as I can tell all switches and routers running a 15 chain code have also lost do write. It is also not in the Nexus command set.
If you’re like me and like to write while you are configuring, it’s a pain, as you either have to escape or do a *shudders* do co ru st – and have hit enter twice.
I, for one, will miss do write.