Is it possible to change the username in Nexus 5?

[chdslv]

Is it possible to change the username and passcode without reinstalling UBPorts?

[hummlbach]

While changing the user isn't supported and not easily doable, changing the passcode is only a bit unintuitive: you have to change the authorization method in system settings to be asked to set the passcode. Not sure how its called exactly in english, but something like that: security&privacy->lock and anlock->security after locking (first item)->choose one of the other two methods and afterwards switch back again... alternatively I guess you could change the code from the terminal issueing passwd.

[chdslv]

@hummlbach
How do I re-install UBports then?

[Lakotaubp]

@chdslv Use the wipe option on the installer. It will remove everything though and give you a clean install.