Fix in https://github.com/vyos/vyos-documentation/pull/234

I have just done a bit of background research to understand this change, after I noticed that the level option was deleted from my VyOS config.

The documentation originally stated:

VyOS defines what users can do on a system by having two privilege levels: operator and admin.

Then on the 1st November 2017 Daniil Baturin wrote a blog post entitled The "operator" level is proved insecure and will be removed in the next releases:

https://blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-next-releases

The following ticket was raised to handle "migrate operator accounts to admin accounts and remove the option to setup an operator account":

• https://phabricator.vyos.net/T1323

Finally the level node was dropped from user because only a single value of admin is allowed:

https://phabricator.vyos.net/R3:62596a64f2155208075352024f5279e723e667e0

However I am not quite sure why the work was done against the T1948 ticket, which is about RADIUS being broken.

These pages also needs updating:

• https://support.vyos.io/en/kb/articles/adding-users-2
• https://support.vyos.io/en/kb/articles/vyos-user-privilege-levels-2