For some Debian systems it can be useful to install neovim manually to get a newer version number than the one shipped with the slow debian release schedule. For this the following lines can be used.

curl -LO https://github.com/neovim/neovim/releases/latest/download/nvim-linux-x86_64.tar.gz
tar xzf nvim-linux-x86_64.tar.gz
sudo mv nvim-linux-x86_64 /usr/local/nvim
sudo ln -s /usr/local/nvim/bin/nvim /usr/local/bin/nvim

Updating works accordingly.

The same goes for tree-sitter.

curl -L https://github.com/tree-sitter/tree-sitter/releases/latest/download/tree-sitter-linux-x64.gz \
| gunzip > tree-sitter
chmod +x tree-sitter
sudo mv tree-sitter /usr/local/bin/

Arch-based Systems

Get the yay-AUR-pckagemanager or something similar (pacman -S yay).
yay -S eza git tmux neovim zsh sc-im

Migration of my dotfiles to other system

set alias in .bashrc: alias config='/usr/bin/git --git-dir=$HOME/.dotfiles/ --work-tree=$HOME'
clone this repository: git clone --bare https://github.com/Tiyn/dotfiles $HOME/.dotfiles
optional: backup old files:

mkdir -p .config-backup && \
config checkout 2>&1 | egrep "\s+\." | awk {'print $1'} | \
xargs -I{} mv {} .config-backup/{}

checkout changes: config checkout server
ignore untracked files: config config --local status.showUntrackedFiles no
pull current setup: config pull --set-upstream origin server
finish setup for vim:
- open vim
- :PlugInstall
- :CocInstall
change shell to zsh: chsh -s /bin/zsh
- it is possible that you're asked for a password. If so you need to change the line in /etc/pam.d/chsh from auth required pam_shells.so to auth sufficient pam_sehlls.so