vi, getting multiple “Sorry, the command is not available in this version…” after reinstall

ry from within vim ...

:version

and if your get ...

Small version without GUI.

You are missing package vim-gui-common. It is probably also advisable to install vim-runtime. Commands to install:

sudo apt-get install vim-gui-common
sudo apt-get install vim-runtime

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Another cause might be that alternatives is pointing to the wrong one:

update-alternatives --display vim

to show what is used and ...

update-alternatives --config vim

to change to another vim. It could be that /usr/bin/vim.gnome is used and you need /usr/bin/vim

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edit: Michael Durrant fixed it with #1 in case anyone wonders.