I would like to modify the ubuntu 20.04 installation iso to include (vlc, audacious,mc,rar,unrar, spanish support,etc), remove (totem,rhythmbox,english support, etc) and upgrade packages. Use Cubic but change the permissions of various system directories. Leading to a security risk. For example /etc and /usr have 777 I need customize installer becouse the computers I want installer don't have network acces I need customize installer because I live in Cuba and is very difficult access online repository from anywhere also the connections are too slow for example in this PC (256kbs).
First, make sure you have the latest version of Cubic following the instructions at the Cubic web page.
sudo apt-add-repository ppa:cubic-wizard/release sudo apt update sudo apt install cubic
Navigate to the Terminal page.
Add the necessary repositories
add-apt-repository --yes main add-apt-repository --yes restricted add-apt-repository --yes universe add-apt-repository --yes multiverse
Remove your existing packages.
apt autoremove --purge totem rhythmbox
You should probably leave the English language packages and let them automatically be removed by the installer after installation of the OS (see step 8 below).
Add your new packages
apt install vlc audacious mc rar unrar
Install your language packages
(You will find these are already installed in the Live ISO).
apt install language-pack-es language-pack-es-base language-pack-gnome-es language-pack-gnome-es-base
I recommend being very careful when doing this. Making files inside /etc accessible to all users may cause your system to not boot, because some files must only be readable by root.
As an example, you can change permissions for
/etc/networkand all files or directories in it to 777:
cd /etc/ chmod -R u+rw,g+rw,o+rw network
Tell the Ubiquity installer to not remove your language packages
Navigate to the Packages page.
Click (anywhere) on the list, and begin typing the word "language" to search for packages that begin with this word.
Uncheck the following four packages:
This will ensure that the installer does not remove your language packages. This is not strictly necessary, since we will select your language and locale in the preseed below (step 9), but it is a good measure nevertheless.
You will also notice that the English language packages are flagged (check-marked) to be automatically removed by the installer after installation of your customized OS (if English is not selected as your default language).
Select your default language and locale
Navigate to the Options page, and select the Preseed tab.
/preseed/ubuntu.seedin the left pane.
Configure your locale and language by appending the following text at the end of this file. (Note that "es" = Spanish, and "CU" = Cuba).
# Set language, country and locale. d-i debian-installer/language string es d-i debian-installer/country string CU d-i debian-installer/locale string es_CU.UTF-8 # Specify additional locales to be generated. d-i localechooser/supported-locales multiselect es_CU.UTF-8 # Set keyboard layout. d-i keyboard-configuration/xkb-keymap select es # Set time zone and region. d-i time/zone string America/Havana d-i debian-installer/region string es_CU.UTF-8
Optionally, if you want multiple locales generated, separate them with commas as show here:
# Specify additional locales to be generated. d-i localechooser/supported-locales multiselect es_CU.UTF-8, fr_CH.UTF-8, en_US.UTF-8
Here are some references if you are configuring different languages or locales:
Generate your customized ISO
Finally, navigate to Cubic's Generate page to create your customized ISO.