ref: b9b2ce4592015b0dc049661059ed2af4a9696f54
dir: /cpu-setup.md/
# Setting up a networked 9front machine 0. First off, we'll make our life bearable by setting up a temporary cpu service listener. This will let us access the new system with `rcpu(1)` or `drawterm(1)`, instead of having to suffer some terrible VNC console or similar. Make sure the machine has network access, then run the following: echo 'key proto=dp9ik dom=9front user='$user' !password=BADBADDIE' >/mnt/factotum/ctl aux/listen1 -t 'tcp!*!rcpu' /rc/bin/service/tcp17019 1. Complete the standard installation using inst/start, then reboot into a newly installed system. The following steps assume the cwfs(4) was selected as the file server, and that the basic networking works. 2. Start with adding your own user to the file server, also add it to some standard groups: ; con -C /srv/cwfs.cmd newuser kvik newuser sys +kvik newuser adm +kvik newuser upas +kvik Before proceeding, restart the machine and log in with the new user, then run: /sys/lib/newuser This will set up your home directory. 3. Setting up the FS listener This step is OPTIONAL. If you don't plan to set up TCP/TLS or PXE booting it is fine to skip it for now. For `cwfs(4)` to start a network listener it must be told to to so in the command line used to start it. This can be done through the `plan9.ini`. First we'll need to mount the `9fat` partition. If you aren't doing this from the console, i.e. you've done step 0., then you'll have to make sure you are mounting and modifying the target machine's `plan9.ini`, and not the one belonging to your terminal. We can do this by binding correct devices and being explicit with the `9fs` command: ; bind -b '#S' /dev ; 9fs 9fat /dev/sdF0/9fat You may now edit `/n/9fat/plan9.ini`. Modify the `bootargs=` parameter as follows, or use the equivalent `nobootprompt=` parameter to avoid the need for manual intervention during the boot. The latter is highly recommended. nobootprompt=local!/dev/sdF0/fscache -a tcp!*!564 This tells `cwfs(4)` to start a listener on port 564. By default the file server doesn't require authentication, this is so that local mounting can work without an auth server. However, with the previous step we've exposed the file server to the network which means anyone could mount it just by guessing an existing user. To prevent this we'll tell the file server to authenticate remote clients. This is done on the file server console by toggling the `noauth` command. Make sure you get `auth enabled` message. ; con -C /srv/cwfs.cmd noauth auth enabled 4. Setting up the CPU listener For CPU listener to get started at boot time it is enough to set the `service=` parameter in `plan9.ini`: service=cpu 5. Setting up hands-free booting In step 3. we've set up the `nobootprompt=` parameter, which makes sure the root file system is mounted automatically at boot. In this step we'll set up hostowner credentials, the user name and password, so as to avoid the need for manual intervention on the system console. The auth credentials must be stored in the system NVRAM, which is usually a small disk partition on PC systems. We can write to it with the `auth/wrkey(8)`. **NOTE** Make very sure to enter correct information when prompted. It is very common for people to mistype their password, or specify a wrong authentication domain, or even username, which will cause very hard to diagnose problems later on. The same information will be asked for later when creating an auth user and configuring the authentication server. **NOTE 2** If you have followed the step 0. then it is best to explicitly specify the `nvram` partition that you want to write to. On PC some automatic process is used to find a suitable partition. It is very likely that this process will guess wrong. Use the `nvram=` environment variable to select the correct partition: ; nvram=/dev/sdF0/nvram auth/wrkey bad nvram des key bad authentication id bad authentication domain authid: kvik authdom: a-b.xyz secstore key: <press enter to skip> password: <type your password> 6. Setting up the AUTH server We are almost done and ready to reboot, but almost nothing set up above will work before an authentication server is running. First we'll have to make sure that the authentication server process starts during boot. This is done automatically by the CPU machine's bootup procedure if it learns that it is supposed to be the authentication server. We tell it so by adding an entry in the system network database which associates the machine, the auth server, with an authentication domain that it will serve. Add the following entry on a line of its own in the file `/lib/ndb/local`, replacing the domain with some domain or string of your own: auth=dum authdom=a-b.xyz This associates the machine named `dum` with the authentication domain `a-b.xyz`. Remember that this was the same authdom: that we stored in the machine's nvram with `auth/wrkey`. **NOTE** this entry is independent from everything else in this file. Do not add it to either the `ipnet=` entry, or the `sys=` line. On next reboot the machine `dum` will figure out it's supposed to be an authentication server and start the services it needs to act as one. Now we can add users to the auth server. For this start a temporary `keyfs(4)`, then use `auth/changeuser(8)` command to add users: ; auth/keyfs ; auth/changeuser kvik Password: <same as what's in nvram> Confirm password: assign new Inferno/POP secret? [y/n]: n Expiration date (YYYYMMDD or never)[never]: Post id: User's full name: Department #: User's email address: kvik@a-b.xyz Sponsor's email address: user kvik installed for Plan 9 Final step involves letting our new user "speak for" other users. This is neccessary if the hostowner of the machine running the auth server is someone other than `glenda`, which is the case here. Simply add the following entry to the file `/lib/ndb/auth`: hostid=kvik uid=!sys uid=!adm uid=* 7. Reboot fshalt -r After reboot the machine should bring itself up automagically and let you connect to it using `drawterm` or `rcpu`.