Running classic environment fails:
$ uname -a
Linux localhost 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 29 16:28:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
$ snap list
Name Version Rev Tracking Publisher Notes
classic 18.04-0.1 37 18/edge canonical* devmode
core 16-2.37.1 6350 stable canonical* core
core18 18 594 stable canonical* base
pc 18-1 31 18 canonical* gadget
pc-kernel 4.15.0-45.48 185 18 canonical* kernel
snapd 2.36.3 1968 stable canonical* snapd
snappy-debug 0.32-snapd2.36.2+git 274 stable canonical* -
sudo snap install --channel=18/edge classic --devmode
classic (18/edge) 18.04-0.1 from Canonical* installed
$ sudo classic
Creating classic environment
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'vim-tiny' for regex 'vim.tiny'
The following additional packages will be installed:
vim-common xxd
Suggested packages:
libc6-i386 indent
The following NEW packages will be installed:
libnss-extrausers sudo vim-common vim-tiny xxd
0 upgraded, 5 newly installed, 0 to remove and 0 not upgraded.
Need to get 1040 kB of archives.
After this operation, 3661 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu bionic/main amd64 sudo amd64 1.8.21p2-3ubuntu1 [428 kB]
Get:2 http://archive.ubuntu.com/ubuntu bionic/main amd64 xxd amd64 2:8.0.1453-1ubuntu1 [49.2 kB]
Get:3 http://archive.ubuntu.com/ubuntu bionic/main amd64 vim-common all 2:8.0.1453-1ubuntu1 [70.4 kB]
Get:4 http://archive.ubuntu.com/ubuntu bionic/main amd64 vim-tiny amd64 2:8.0.1453-1ubuntu1 [476 kB]
Get:5 http://archive.ubuntu.com/ubuntu bionic/main amd64 libnss-extrausers amd64 0.6-4 [15.7 kB]
Fetched 1040 kB in 0s (3840 kB/s)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LC_CTYPE = "UTF-8",
LANG = (unset)
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
debconf: delaying package configuration, since apt-utils is not installed
E: Can not write log (Is /dev/pts mounted?) - posix_openpt (19: No such device)
Selecting previously unselected package sudo.
(Reading database ... 4036 files and directories currently installed.)
Preparing to unpack .../sudo_1.8.21p2-3ubuntu1_amd64.deb ...
Unpacking sudo (1.8.21p2-3ubuntu1) ...
Selecting previously unselected package xxd.
Preparing to unpack .../xxd_2%3a8.0.1453-1ubuntu1_amd64.deb ...
Unpacking xxd (2:8.0.1453-1ubuntu1) ...
Selecting previously unselected package vim-common.
Preparing to unpack .../vim-common_2%3a8.0.1453-1ubuntu1_all.deb ...
Unpacking vim-common (2:8.0.1453-1ubuntu1) ...
Selecting previously unselected package vim-tiny.
Preparing to unpack .../vim-tiny_2%3a8.0.1453-1ubuntu1_amd64.deb ...
Unpacking vim-tiny (2:8.0.1453-1ubuntu1) ...
Selecting previously unselected package libnss-extrausers.
Preparing to unpack .../libnss-extrausers_0.6-4_amd64.deb ...
Unpacking libnss-extrausers (0.6-4) ...
Setting up xxd (2:8.0.1453-1ubuntu1) ...
Setting up sudo (1.8.21p2-3ubuntu1) ...
Processing triggers for libc-bin (2.27-3ubuntu1) ...
Setting up vim-common (2:8.0.1453-1ubuntu1) ...
Setting up libnss-extrausers (0.6-4) ...
Setting up vim-tiny (2:8.0.1453-1ubuntu1) ...
update-alternatives: using /usr/bin/vim.tiny to provide /usr/bin/rview (rview) in auto mode
update-alternatives: using /usr/bin/vim.tiny to provide /usr/bin/vi (vi) in auto mode
update-alternatives: warning: skip creation of /usr/share/man/fr/man1/vi.1.gz because associated file /usr/share/man/fr/man1/vim.1.gz (of link group vi) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/it/man1/vi.1.gz because associated file /usr/share/man/it/man1/vim.1.gz (of link group vi) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/pl/man1/vi.1.gz because associated file /usr/share/man/pl/man1/vim.1.gz (of link group vi) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/ru/man1/vi.1.gz because associated file /usr/share/man/ru/man1/vim.1.gz (of link group vi) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/ja/man1/vi.1.gz because associated file /usr/share/man/ja/man1/vim.1.gz (of link group vi) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/vi.1.gz because associated file /usr/share/man/man1/vim.1.gz (of link group vi) doesn't exist
update-alternatives: using /usr/bin/vim.tiny to provide /usr/bin/view (view) in auto mode
update-alternatives: warning: skip creation of /usr/share/man/fr/man1/view.1.gz because associated file /usr/share/man/fr/man1/vim.1.gz (of link group view) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/it/man1/view.1.gz because associated file /usr/share/man/it/man1/vim.1.gz (of link group view) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/pl/man1/view.1.gz because associated file /usr/share/man/pl/man1/vim.1.gz (of link group view) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/ru/man1/view.1.gz because associated file /usr/share/man/ru/man1/vim.1.gz (of link group view) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/ja/man1/view.1.gz because associated file /usr/share/man/ja/man1/vim.1.gz (of link group view) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/view.1.gz because associated file /usr/share/man/man1/vim.1.gz (of link group view) doesn't exist
update-alternatives: using /usr/bin/vim.tiny to provide /usr/bin/ex (ex) in auto mode
update-alternatives: warning: skip creation of /usr/share/man/fr/man1/ex.1.gz because associated file /usr/share/man/fr/man1/vim.1.gz (of link group ex) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/it/man1/ex.1.gz because associated file /usr/share/man/it/man1/vim.1.gz (of link group ex) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/pl/man1/ex.1.gz because associated file /usr/share/man/pl/man1/vim.1.gz (of link group ex) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/ru/man1/ex.1.gz because associated file /usr/share/man/ru/man1/vim.1.gz (of link group ex) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/ja/man1/ex.1.gz because associated file /usr/share/man/ja/man1/vim.1.gz (of link group ex) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/ex.1.gz because associated file /usr/share/man/man1/vim.1.gz (of link group ex) doesn't exist
update-alternatives: using /usr/bin/vim.tiny to provide /usr/bin/editor (editor) in auto mode
update-alternatives: warning: skip creation of /usr/share/man/fr/man1/editor.1.gz because associated file /usr/share/man/fr/man1/vim.1.gz (of link group editor) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/it/man1/editor.1.gz because associated file /usr/share/man/it/man1/vim.1.gz (of link group editor) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/pl/man1/editor.1.gz because associated file /usr/share/man/pl/man1/vim.1.gz (of link group editor) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/ru/man1/editor.1.gz because associated file /usr/share/man/ru/man1/vim.1.gz (of link group editor) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/ja/man1/editor.1.gz because associated file /usr/share/man/ja/man1/vim.1.gz (of link group editor) doesn't exist
update-alternatives: warning: skip creation of /usr/share/man/man1/editor.1.gz because associated file /usr/share/man/man1/vim.1.gz (of link group editor) doesn't exist
Processing triggers for libc-bin (2.27-3ubuntu1) ...
cp: cannot stat '/etc/hostname': No such file or directory
After that:
sudo classic
sudo: unknown user: username
sudo: unable to initialize policy plugin
