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administration

adding users
backups
bypassing resource limits as services user
lxd

adding users

this is deprecated. use the new makeuser script

generate a random password
```
pwgen -1B 15
```
create a new user account:
```
sudo adduser newusername
```

add their ssh pubkey:

echo "ssh pubkey from their signup email" | sudo tee /home/newusername/.ssh/authorized_keys

drop the requested username and generated password in the placeholder below. reply all so that other admins will know that it's been handled.

welcome mail template:

hey ~newusername,

welcome to tilde.team!

your new account has been established. you can ssh into tilde.team with
the ssh key you supplied on registration.

your password is "[[password]]". please change it when you log in for
the first time. the password is used for imap/smtp auth, not shell login,
which is set to only use ssh key authentication.

to get started, type `motd` at the command prompt to see a few ways to
get started. have fun!

the greatest value of tilde.team is not the services provided by the
server, but rather the interesting and welcoming community built by its
users. this is possible because of people like you who choose to make
this a great place. the best way you can help tilde.team is by working
to support a great system culture. chat on irc; build cool programs and
share them with others; focus on learning, and help others learn; be a
good example for others; have fun!

also, your ~/public_html directory is served at
https://tilde.team/~newusername/
(you can also use https://newusername.tilde.team)

check out our wiki at https://tilde.team/wiki/ for more information (and
maybe help us write a new wiki article:)

our irc is tilde.chat, an irc network connecting several
tilde servers. the `chat` command on your ~team shell will open up
weechat with some nice default configs and plugins.
see our wiki article (https://tilde.team/wiki/?page=irc)
or https://tilde.chat site for information on how to connect from elsewhere.
we also have a webclient at https://irc.tilde.team that you can
register for by running the `webirc` command from a shell session.

we look forward to seeing you around! welcome to the ~team!

~tilde.team admins

backups

tilde.team uses tarsnap for backups and is configured to save 12 hourly backups, 7 daily backups, 6 weekly backups, and 2 years' worth of monthly backups.

to see a list of the backups:

sudo tarsnap --list-archives

to restore a backup:

tarsnap -x -f name-of-backup

we keep backups of:

/home
/etc
/var (excluding /var/log and /var/lib/lxd)

see the tarsnap documentation for more information.

bypassing resource limits

(by ~khuxkm)

So occasionally, when you're working with the services user, you'll run into "error: fork: retry: Resource temporarily unavailable" errors.

Here's how to fix it:

07:11 <~khuxkm>  so this is seriously dumb
07:11 <~khuxkm>  so how you fix limits is
07:12 <~khuxkm>  sudo -iu services
07:12 <~khuxkm>  use ps -aux to find the bash process ("-bash")
07:12 <~khuxkm>  then `sudo prlimit --pid <pid> --nproc 1000000:100000000`
07:12 <~khuxkm>  then do what you need to do
07:12 <~khuxkm>  then exit the bash session

lxd

we're not provisioning lxd containers for users at this time

this is the process that i use to create lxd containers for users.

you need two things from the user: an ssh public key (on their ~team shell) and a distro choice

create the container

# debian
lxc launch images:debian/stretch <username>
# ubuntu
lxc launch ubuntu: <username>

make sure the container has an sshd running

lxc exec <username> bash
# might have to adjust this if the image is not a debian-derivative
root@<username> $ apt install openssh-server

copy the user's ssh pubkey to root on the container

lxc exec <username> bash
mkdir -m 700 .ssh
echo "pubkey" >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys

now the user can run ssh root@<username>.lxd to get a shell inside their container the .lxd dns resolver is provided by the lxd daemon itself through dnsmasq

make the container public

check with the user and find out what they want the container to be available as (which domain) nginx matches concrete server_names first, so you can replace the *.tilde.team match

copy user-lxd.template

cd /etc/nginx/sites-available
sudo cp user-lxd.template <username>.tilde.team
sudo vim <username>.tilde.team

replace the username
```
:%s/<user>/<username>/g
:wq
```

enable the vhost

cd /etc/nginx/sites-enabled
sudo ln -s ../sites-available/<username>.tilde.team .

reload nginx

# make sure the configs look ok
sudo nginx -t
sudo service nginx reload

bam! now <username>.tilde.team will forward requests to the container.

make sure that the user is running some kind of webserver on port 80 inside the container!

feel free to add other configs to their vhost or use any of the other tildepage domains

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