I use multiple computers and multiple mobile devices. This is mostly because I like keeping my personal devices/accounts separated from my work-related things, also … company policy. The last 4 years I am using an apple macbook, it’s a managed and restricted device. With managed devices, a lot of features like virtualization, containers or even VPN, anything that has network access and many other functionality were restricted. Recently I got a replacement macbook, thanks to our IT, and now for the first time I can use my old device as an unmanaged macbook.

Oh, I missed a lot!

Tart

To start my journey, I want to quickly spawn virtual machines (mostly ubuntu server) to test/run self hosted applications. I found Tart Virtualization to be excellent for this.

Tart is a virtualization toolset to build, run and manage macOS and Linux virtual machines on Apple Silicon.

To install and use tart is extremely easy:

brew install cirruslabs/cli/tart

tart clone ghcr.io/cirruslabs/macos-tahoe-base:latest tahoe-base
tart run tahoe-base

Ubuntu virtual machine

is very easy to setup an ubuntu virtual machine with tart, as an ubuntu image already exist

tart clone ghcr.io/cirruslabs/ubuntu:24.04 ubuntu
tart set ubuntu --disk-size 20
tart run ubuntu

and the default credentials are:

Username: admin
Password: admin

caveat: Change them if you are going to use them in production.

We can also change the default values

like cpu and/or memory settings, as disk size above

❯ tart set ubuntu --memory 8192
❯ tart set ubuntu --cpu 4

We can start the VM without graphics

❯ tart run ubuntu --no-graphics &

Is this vm running ?

✦ ❯ tart list | grep -i ubuntu
local  ubuntu                                      20   3    6 seconds ago running

OCI    ghcr.io/cirruslabs/ubuntu:24.04             20   5    14 hours ago  stopped
OCI    ghcr.io/cirruslabs/ubuntu@sha256:9e71b46... 20   5    14 hours ago  stopped

We can find the IP of the virtual machine

✦ ❯ tart ip ubuntu
192.168.64.2

… and we can ssh into the VM

✦ ❯ ssh admin@$(tart ip ubuntu)
admin@192.168.64.2's password:

We can even add it to our tailscale network

I guess you already know how to add machines to your tailnet

and don’t forget to stop or delete your VMs if you do not need them

tart stop ubuntu
tart delete ubuntu

It works !
Evaggelos

The purpose of this blog post is to act as a visual guide/tutorial on how to setup an iOS device (iPad or iPhone) using the native apps against a custom Linux Mail, Calendar & Contact server.

Disclaimer: I wrote this blog post after 36hours with an apple device. I have never had any previous encagement with an apple product. Huge culture change & learning curve. Be aware, that the below notes may not apply to your setup.

Original creation date: Friday 12 Oct 2018
Last Update: Sunday 18 Nov 2018

Linux Mail Server

Notes are based on the below setup:

• CentOS 6.10
• Dovecot IMAP server with STARTTLS (TCP Port: 143) with Encrypted Password Authentication.
• Postfix SMTP with STARTTLS (TCP Port: 587) with Encrypted Password Authentication.
• Baïkal as Calendar & Contact server.

Thunderbird

Thunderbird settings for imap / smtp over STARTTLS and encrypted authentication

Baikal

Dashboard

CardDAV

contact URI for user Username

https://baikal.baikal.example.org/html/card.php/addressbooks/Username/default

CalDAV

calendar URI for user Username

https://baikal.example.org/html/cal.php/calendars/Username/default

iOS

There is a lot of online documentation but none in one place. Random Stack Overflow articles & posts in the internet. It took me almost an entire day (and night) to figure things out. In the end, I enabled debug mode on my dovecot/postifx & apache web server. After that, throught trail and error, I managed to setup both iPhone & iPad using only native apps.

Mail

Open Password & Accounts & click on New Account

Choose Other

Now the tricky part, you have to click Next and fill the imap & smtp settings.

Now we have to go back and change the settings, to enable STARTTLS and encrypted password authentication.

STARTTLS with Encrypted Passwords for Authentication

In the home-page of the iPad/iPhone we will see the Mail-Notifications have already fetch some headers.

and finally, open the native mail app:

Contact Server

Now ready for setting up the contact account

https://baikal.baikal.example.org/html/card.php/addressbooks/Username/default

Opening Contact App:

Calendar Server

https://baikal.example.org/html/cal.php/calendars/Username/default