JARVIS

JARVIS (10.0.0.4) is a sandbox VM accessible to any member. It has a shared directory accessible from the space's networked computers, it can host member webpages and can be used via SSH. Computers can also be configured to access JARVIS via the internet using SSH.

Note: December 2025 - Jarvis has been replaced with a new Jarvis! If you've ssh'd into it before, you'll receive a warning about the host key changing. You can fix this by running ssh-keygen -R jarvis.nottinghack.org.uk and ssh-keygen -R '[jarvis.nottinghack.org.uk]:3000'.

Specs

Like Holly, JARVIS is a VM running on Collective, it currently has the following resources

• 1CPU core
• 8GB RAM
• 200GB HDD
• Debian 13 (trixie) 64bit
  

Running service's include

• SSH
• Apache with PHP5
• MySQL
• SAMBA
• MQTT

File manager access

Every member can create an unencrypted folder on the shared folder on the JARVIS server (/home/shared).

Linux

In Nautilus on Ubuntu:

• Browse Network > Windows Network > nottinghack > JARVIS > Shared
  • Enter HMS credentials <username> and <password> in the dialogue box, leave other options as their default values.

Note that this will only work locally in the space, since Samba is not exposed to the internet.

On a modern linux install, you probably need to add

client min protocol = NT1

to

/etc/samba/smb.conf

. You should then be able to connect from a file browser to smb://jarvis

SSH access

Note: SSH and web address use the all lowercase form of your HMS <username>

Local network

On the local network JARVIS can be accessed via SSH using password or key.

Using a Linux terminal

ssh <username>@jarvis

Enter your HMS <password> when prompted. You will be logged on as '<username>@jarvis' and be in your home directory ('/home/<username>' AKA '~').

You will likely need to use ssh -oHostKeyAlgorithms=+ssh-rsa -oPubkeyAcceptedKeyTypes=+ssh-rsa <username>@jarvis with more modern SSH clients.

Using Linux file manager

Select 'Connect to server' with settings:

type: SSH / SFTP

host: jarvis

login: <username>

You will be prompted to enter your HMS <password>.

Internet access

JARVIS is accessible from the the internet on jarvis.nottinghack.org.uk port 3000. However, from the internet you will need to using a key to login, not your HMS <password>. This requires configuring your client computer (that will access JARVIS over the internet) and your JARVIS user account (as server). Part of the set up requires being logged into the Hackspace's network; therefore the whole set up can not be done over the internet.

1 - Get SSH key from client

If your client computer hasn't got a SSH create one using:

ssh-keygen -trsa

You can create a key with a password (we'll refer to this as <key password>).

This creates two key in the directory '~/.ssh':

The private key 'id_rsa' - don't share this one.

The public one 'id_rsa.pub' - bring this one to Hackspace

2 - SSH public key to Hackspace server

The public key needs to be appended to the 'authorized_keys' file on your JARVIS user account. SSH into JARVIS on a computer connected to the local Hackspace network.

ssh <username>@jarvis

Enter your HMS <password> when prompted. Check the '.ssh' directory in your home directory of your JARVIS user account (create it if it doesn't exist). If there is no 'authorized_keys' file you can simple rename the 'id_rsa.pub' file from your client computer 'authorized_keys', then copy it into this directory ('/home/<username>/.ssh').

It's also worth ensuring the permissions for the authorized_keys file is correct. If the permissions are too open, the ssh server will assume its untrusted.

 chmod 700 .ssh
 chmod 600 .ssh/authorized_keys

3 - SSH access from server

Your client computer should now be able to SSH into JARVIS over the internet.

Using a Linux terminal

ssh <username>@jarvis.nottinghack.org.uk -p 3000

Enter your <key password> if prompted. You will be logged on as '<username>@jarvis' and be in your home directory ('/home/<username>' AKA '~').

Using Linux file manager

Select 'Connect to server' with settings:

type: SSH / SFTP

host: jarvis.nottinghack.org.uk

port: 3000

login: <username>

Or go to sftp://<username>@jarvis.nottinghack.org.uk:3000/

If prompted to enter your <key password>.

Recommended .ssh/config

In order to connect easily from home or the hackspace, it's possible to customise your local .ssh/config file. This adds the old host and public keys which jarvis still uses, allowing you to easily connect from home using ssh jarvis or from in the space, using ssh jarvis.local. Remember to replace your username

Host jarvis
     Hostname jarvis.nottinghack.org.uk
     User <username>
     Port 3000
     HostKeyAlgorithms ssh-rsa
     PubkeyAcceptedKeyTypes ssh-rsa

Host jarvis.local
     Hostname jarvis
     User <username>
     HostKeyAlgorithms ssh-rsa
     PubkeyAcceptedKeyTypes ssh-rsa

Resources

• SSH with authentication key instead of password - more detailed explanation of SSH keys

Link to folder in /home/shared

If using Nautilus to SSH to your account on JARVIS it can be handy to link to folder in /home/shared.

After connecting using SSH, the folder will be '/home/<lowercase HMS username>'. Create a link to the desired folder using:

ln -s /home/shared/<folder_name> <link name>

Clicking on <link name> will take you to '/home/shared/<folder_name>'.

Webpage access

Note: SSH and web address use the all lowercase form of your HMS <username>

Members can have a webpage hosted at an address based on their username.

Your 'public_html' directory is on JARVIS at '/home/<username>/public_html'. Your 'index.html' file goes here.

This is served at web address: http://jarvis.nottinghack.org.uk/~<username>.

As we only have one external IP address, WEB/port 80 connections to JARVIS are proxied by Holly.

See also

• Holly - not freely accessible by members as it is mission critical