I've tried updating Ubuntu 16.04 to 18.04 but when I try from GUI it tells me I need permissions and then soon after, it prompts me to update but when I press update, it goes away and nothing happens. I've tried updating via terminal but it gives me this
sudo do-release-upgrade
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [819 B]
Get:2 Upgrade tool [1,251 kB]
Fetched 1,252 kB in 0s (0 B/s)
authenticate 'bionic.tar.gz' against 'bionic.tar.gz.gpg'
extracting 'bionic.tar.gz'
Reading cache
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Hit http://repository.spotify.com stable InRelease
Hit http://archive.ubuntu.com/ubuntu xenial InRelease
Get:1 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [99.8 kB]
Hit https://dl.winehq.org/wine-builds/ubuntu xenial InRelease
Hit https://brave-browser-apt-release.s3.brave.com stable InRelease
Hit https://repo.steampowered.com/steam stable InRelease
Get:2 https://dl.winehq.org/wine-builds/ubuntu bionic InRelease [6,263 B]
Get:3 https://dl.winehq.org/wine-builds/ubuntu jammy InRelease [8,041 B]
Get:4 http://archive.ubuntu.com/ubuntu xenial-security InRelease [99.8 kB]
Get:5 https://esm.ubuntu.com/infra/ubuntu xenial-infra-security InRelease [7,518 B]
Ign https://dl.winehq.org/wine-builds/ubuntu bionic InRelease
Get:6 https://esm.ubuntu.com/infra/ubuntu xenial-infra-updates InRelease [7,475 B]
Ign https://dl.winehq.org/wine-builds/ubuntu jammy InRelease
Get:7 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 DEP-11 Metadata [326 kB]
Get:8 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 DEP-11 Metadata [281 kB]
Get:9 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 DEP-11 Metadata [5,960 B]
Get:10 http://archive.ubuntu.com/ubuntu xenial-security/main amd64 DEP-11 Metadata [93.8 kB]
Get:11 http://archive.ubuntu.com/ubuntu xenial-security/universe amd64 DEP-11 Metadata [130 kB]
Get:12 http://archive.ubuntu.com/ubuntu xenial-security/multiverse amd64 DEP-11 Metadata [2,464 B]
Fetched 1,068 kB in 0s (0 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
Restoring original system state
Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done
It's worth mentioning that the laptop I'm using is a Chromebook in developer mode using crouton to run ubuntu.
the laptop is powerful enough for the update.
the version of ubuntu running now is Ubuntu 16.04.7 LTS 64-bit and to my knowledge, it's running some form of gnome. I'm very new to Linux so I'm not sure.