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).
I have ubuntu 20.04 installed and I want that all users use the same template when create a new documents. This must be valid also for future new user that may be created in the system.
The template used when open a new document from anyhere. right-clicks in nautilus, aplications menu, menu inside libreoffice.
I want change this because installed ubuntu on work computer and all should use the same template for all documents. And i want migrate more computers