deb http://deb.devuan.org/merged ascii-updates main

Then run apt-get update (Or however you update the cache in synaptic. Reload?)

Edit the Exec line in /usr/share/applications/synaptic.desktop with either of the examples I gave you above.

You have ascii and ascii-security in your sources. You could add ascii-updates.

Another option is to edit the .desktop file so it runs a different command. Change the line that has 'Exec=synaptic-pkexec' to one of the following.

Exec=gksu synaptic
or
Exec=xterm -e 'su -c synaptic'

or replace xterm with your favorite terminal.

Note: you don't need to be in the sudo group to use gksu.
Note2: if you are in the sudo group, synaptic might work from the menu without editing the .desktop file. (It did for me in a test install.)

How to proceed to add for ascci updates? Wich is the of .desktop  directory?

I tried to open synaptic or gparted  from sudo  group and it does not open.

The deb-src lines are for source packages. Unless you're planning on creating .deb packages, you can comment those lines.

The problem with synaptic (and gparted and just about anything else that requires root privileges) is that pkexec is broken. One workaround as mentioned above is to start it from a terminal as root. Another option is to edit the .desktop file so it runs a different command. Change the line that has 'Exec=synaptic-pkexec' to one of the following.

Exec=gksu synaptic
or
Exec=xterm -e 'su -c synaptic'

or replace xterm with your favorite terminal.

Note: you don't need to be in the sudo group to use gksu.
Note2: if you are in the sudo group, synaptic might work from the menu without editing the .desktop file. (It did for me in a test install.)

Important: set up the repos first!
BTW: there are ASCII-Beta isos!
There is good documentation in this forum. Find it. Good luck!

It seems that you haven't read it right, the open topic is from the ISO Beta ASCII that I was testing in virtualbox.

I would do it the old way:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade

Important: set up the repos first!
BTW: there are ASCII-Beta isos!
There is good documentation in this forum. Find it. Good luck!

I'm testing Devuan ascii beta on virtualbox, and continues with the  old software, which are the ascii repositories to automatically update the package and software?

Note:
         Synaptic  will not open when you click, any solution?.

The current repositories of ascii is:

# 

# deb cdrom:[Debian GNU/Linux 2.0.0-beta _Ascii_ - Official amd64 DVD Bina$

# deb cdrom:[Debian GNU/Linux 2.0.0-beta _Ascii_ - Official amd64 DVD Bina$

deb http://deb.devuan.org/merged ascii main
deb-src http://deb.devuan.org/merged ascii main

# ascii-security, previously known as 'volatile'
deb http://deb.devuan.org/merged ascii-security main non-free
deb-src http://deb.devuan.org/merged ascii-security main non-free