"Please install all available updates for your release before upgrading."
This is an Ubuntu refrain that has been echoing through the woods for several years.
My encounter is the result of attempts to get a preexisting Windoze_10 installation
to coexist with Trisquel. Neither the TQ_10 flash drive in its USB slot nor the
TQ_10 Live DVD in the recognized DVD-RW optical drive will boot. I've been forced to
try System/Control Center/Software Updater, where it won't perform dist-upgrade or
do-release-upgrade without circling back to the forum topic. Update-Manager has not
offered any solution, nor have countless Ubuntu forums.
You had replied #1 on this thread
https://trisquel.info/en/forum/how-install-trisquel-9-without-usb-drive-or-dvd
then #4 by loldier explains how one can upgrade to a new release, in your case from Trisquel 9 to 10, using the software updater. I think something like this is how I got from 8 to 9, the process took a long time is all I remember. If you can still access your installed Trisquel 9 maybe give this a try, see whether the software updater will point out that there is a new release, 10.
You may have seen the following script that was necessitated by some lack of certificates
at the mirrors from which we download trisquel software:
sudo sed -i s/http/https/ /etc/apt/sources.list which changes all the https's
in /etc/apt/sources.list to http's.
In desperation I modified that script to get an entirely different result:
sudo sed -i s/etiona/nabia/ /etc/apt/sources.list
Don't try this at home folks, we're all experts here ...
Changing:
deb https://mirror.math.princeton.edu/pub/trisquel-packages etiona main
deb-src https://mirror.math.princeton.edu/pub/trisquel-packages etiona main
deb https://mirror.math.princeton.edu/pub/trisquel-packages etiona-security main
deb-src https://mirror.math.princeton.edu/pub/trisquel-packages etiona-security main
deb https://mirror.math.princeton.edu/pub/trisquel-packages etiona-updates main
deb-src https://mirror.math.princeton.edu/pub/trisquel-packages etiona-updates main
#deb https://mirror.math.princeton.edu/pub/trisquel-packages etiona-backports main
#deb-src https://mirror.math.princeton.edu/pub/trisquel-packages etiona-backports main
To
deb https://mirror.math.princeton.edu/pub/trisquel-packages nabia main
deb-src https://mirror.math.princeton.edu/pub/trisquel-packages nabia main
deb https://mirror.math.princeton.edu/pub/trisquel-packages nabia-security main
deb-src https://mirror.math.princeton.edu/pub/trisquel-packages nabia-security main
deb https://mirror.math.princeton.edu/pub/trisquel-packages nabia-updates main
deb-src https://mirror.math.princeton.edu/pub/trisquel-packages nabia-updates main
#deb https://mirror.math.princeton.edu/pub/trisquel-packages nabia-backports main
#deb-src https://mirror.math.princeton.edu/pub/trisquel-packages nabia-backports main
Whereas the actual sources.list file for etiona looks like this:
deb https://archive.trisquel.info/trisquel/ etiona main
deb-src https://archive.trisquel.info/trisquel/ etiona main
deb https://archive.trisquel.info/trisquel/ etiona-security main
deb-src https://archive.trisquel.info/trisquel/ etiona-security main
deb https://archive.trisquel.info/trisquel/ etiona-updates main
deb-src https://archive.trisquel.info/trisquel/ etiona-updates main
#deb https://archive.trisquel.info/trisquel/ etiona-backports main
#deb-src https://archive.trisquel.info/trisquel/ etiona-backports main
Necessitating that the mirror site for the ensuing apt-get update and apt-get upgrade
be changed to suit.
This approach is bound to make a mess of nabia as the directory structures are not likely
to match between the two sets of software.
Unless there is a typo, I guess you need,
sudo sed -i 's/etiona/nabia/g' /etc/apt/sources.list
edit:
also, why not use:
do-release-upgrade