gnome-session-flashback on Ubuntu 14.04 [SOLVED]

I have built a desktop from old bits for a Linux friend ( Ubuntu 14 ) to replace her 0.75GB system which is a trifle slow!
I have kept my account as Administrator, in which I have installed gnome-session-flashback, and want to install it likewise in the new user’s account (which has the dreaded Unity Desktop).
Not knowing how to do that from my Admin account, I tried temporarily giving the user administrator pivileges but the apt-get command from her account tells me that she is not on the sudoers list - and my password doesn’t work, of course.
What the easiest way of installing the gnome flashback desktop on a secondary user’s account?

Your advice would be very welcome.
Thank you.

Would not be easier to add that user to the sudoers?
Like this (from your account):

sudo usermod -aG sudo <username>

Obviously replace with the real user name.

Once you done then you could remove that user from the sudoers list with:

sudo gpasswd  -d <username> sudo

You are a genius!
Many thanks, as usual, Mark.


Dunno what you’re thanking me for Keith … SeZo helped you with this one :wink:

Oh dear, how embarrassing! Force of habit, I guess.

My belated thanks to Sezo.