Missing section for adding uids

[angelacastaneda]

Love this guide and having so much value out of my yubikey.

I followed it for myself back in fall when things weren't so automated, and I just helped my friend set up his key today, and while it is nice to be able to copy-paste more commands, one thing that was very useful with the guide then was a pit stop during key generation to run adduid for more emails and names.

I helped him add the extra email out of script when editing the Certify key, but he would not have figured it out without me being there to help.

[drduh]

Thank you for the feedback @angelacastaneda

My impression is the use of additional identities is quite rare for the purposes of this guide. Would you mind sharing more about your context/use case? And how we could make this pit stop more prominent and helpful for users such as your friend?

[angelacastaneda]

I'm something of a multicultural guy, so I have different email addresses depending on the language. I also have a leet, hacker email too that I use for git commits, mailing lists, open source stuff in general to separate from the normal, personal email address.

see key here -> FB38 5581 F9E8 58F3 99DE 8DFE 099F 4FAF E6D2 E988

That last use-case was the one that was relevant to my friend and I think a lot of people that wanna do the effort of encrypting with a yubikey but don't wanna have to buy a separate one for another email they might want to use.

[forbytten]

I also have a use case for multiple uids: I want to use the same key for both GitHub and GitLab and potentially more repos. Both GitHub and GitLab allow use of a private email address, specific to each provider. From my brief testing, a key with both uids will allow commits to be marked as verified by both providers. I don't know how common this use case is but I would imagine it's not that rare, or at least it shouldn't be, either now or in the future ;) albeit, this use case probably only applies to users who have all the following requirements:

1. Signed/verified commits
2. Need to use both GitHub and GitLab and/or other repositories
3. Don't want a real email exposed in their key and want to take advantage of the repository providers' anonymizing functionality
4. Want a single key

I have raised pull request 464 with a suggested change.