diff --git a/bootstrap.sh b/bootstrap.sh
new file mode 100644
index 0000000..2e3cc95
--- /dev/null
+++ b/bootstrap.sh
@@ -0,0 +1,283 @@
+#!/bin/bash
+
+set -e
+
+centos7() {
+    # 1. update
+    sudo yum -y install epel-release
+    sudo yum -y update
+
+    # rxvt-unicode-256color to have proper terminfo
+    pgs="bash-completion
+         ccze
+         ctags
+         gcc
+         gcc-c++
+         git-review 
+         htop
+         jq 
+         kernel-devel
+         make
+         mc
+         ptpython2
+         python-devel
+         python-devel 
+         python-flake8 
+         python-ipython-console
+         python-pip
+         python2-apsw 
+         python2-jedi 
+         python2-mccabe 
+         python2-pip
+         python3-devel
+         python3-pip
+         python34-apsw 
+         python36-devel 
+         python36-jedi 
+         python36-mccabe
+         rxvt-unicode-256color
+         the_silver_searcher 
+         tmux
+         vim"
+
+    # 2. install tools
+    sudo yum install -y $pgs
+
+    # 3. cleanup
+    sudo yum -y clean all
+
+    # 4. set default editor
+    echo 'export visual="vim"' | sudo tee /etc/profile.d/vim.sh
+    echo 'export editor="vim"' | sudo tee -a /etc/profile.d/vim.sh
+
+    # 5. install non-medieval version of vim (not working anymore)
+    # wget ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home:/fusion809/centos_7/x86_64/vim-common-8.1.0875-1.1.x86_64.rpm
+    # wget ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home:/fusion809/centos_7/x86_64/vim-enhanced-8.1.0875-1.1.x86_64.rpm
+    # wget ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home:/fusion809/centos_7/x86_64/vim-icons-8.1.0875-1.1.x86_64.rpm
+    # wget ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home:/fusion809/centos_7/x86_64/vim-minimal-8.1.0875-1.1.x86_64.rpm
+
+    # # this has to be run all at once, otherwise we will not have sudo for a
+    # # moment.
+    # sudo bash -c "yum -y remove vim-minimal vim-common vim-enhanced;
+        # rpm -i vim-common-8.1.0875-1.1.x86_64.rpm \
+        # vim-enhanced-8.1.0875-1.1.x86_64.rpm \
+        # vim-icons-8.1.0875-1.1.x86_64.rpm \
+        # vim-minimal-8.1.0875-1.1.x86_64.rpm;
+        # yum -y install sudo"
+
+    # rm vim-common-8.1.0875-1.1.x86_64.rpm vim-enhanced-8.1.0875-1.1.x86_64.rpm \
+        # vim-icons-8.1.0875-1.1.x86_64.rpm vim-minimal-8.1.0875-1.1.x86_64.rpm
+
+    # 6. install tools from pypi (only py3, no more latest setuptools for py2)
+    sudo pip3 install -u pip setuptools
+    installed_pkgs=$(pip list)
+    if echo "${installed_pkgs}" | grep -qv "rainbow"; then
+        sudo pip install rainbow
+        sudo pip3 install rainbow
+    fi
+
+    installed_pkgs=$(pip3 list)
+    for pkg in remote_pdb pdbpp; do
+        if echo "${installed_pkgs}" | grep -qv "${pkg}"; then
+            sudo pip3 install ${pkg}
+        fi
+    done
+
+    # 7. copy configuration for bash, git, tmux
+    cp .bash_prompt ~/
+    cp .tmux.conf ~/
+    # v and y like vi in copy-mode
+    echo "bind -t vi-copy 'v' begin-selection" >> ~/.tmux.conf
+    echo "bind -t vi-copy 'y' copy-selection" >> ~/.tmux.conf
+    cp .gitconfig ~/
+    cp cleanup.sh ~/
+    echo '. ~/.bash_prompt' >> ~/.bashrc
+    echo "alias ip='ip -c'" >> ~/.bashrc
+
+    # 8. get my vim config
+    if [ ! -d ~/.vim ]; then
+        git clone https://github.com/gryf/.vim ~/.vim
+        # populate plugins
+        vim -c ':plugupdate' -c ':qa!'
+        # showmarks is a stubborn one
+        mkdir ~/.vim/bundle/showmarks/doc
+    fi
+
+    # make current user sudo passwordless
+    if [ -z "$(sudo grep "${user}" /etc/sudoers)" ]; then
+        echo "${user} all = (all) nopasswd: all" | sudo tee -a /etc/sudoers
+    fi
+
+    # clone devstack
+    git clone https://opendev.org/openstack/devstack ~/devstack
+    cp kuryr.conf ~/devstack/local.conf
+}
+
+fedora() {
+    # fedora 31
+    # 1. update
+    sudo yum -y update
+
+    # rxvt-unicode-256color to have proper terminfo
+    PGS="bash-completion vim mc htop ctags git-review the_silver_searcher 
+         rxvt-unicode-256color tmux jq gcc gcc-c++ kernel-devel make 
+         python3-ipython ptpython3 python3-jedi python3-flake8 python3-mccabe 
+         python3-pylint python3-apsw python2-pip python3-pip python3-devel 
+         python2-devel python2"
+
+    # 2. install tools
+    sudo yum install -y $PGS
+
+    # 3. cleanup
+    sudo yum -y clean all
+
+    # 4. set default editor
+    echo 'export VISUAL="vim"' | sudo tee /etc/profile.d/vim.sh
+    echo 'export EDITOR="vim"' | sudo tee -a /etc/profile.d/vim.sh
+
+
+    # 5. install tools from pypi
+    sudo pip install -U pip setuptools
+    installed_pkgs=$(pip list)
+    pkgs_to_install=
+    for pkg in remote_pdb pdbpp rainbow; do
+        if echo "${installed_pkgs}" | grep -qv "${pkg}"; then
+            pkgs_to_install="${pkgs_to_install} ${pkg}"
+        fi
+    done
+
+    if [ -n "${pkgs_to_install}" ]; then
+        sudo pip install ${pkgs_to_install}
+    fi
+
+    # 6. copy configuration for bash, git, tmux
+    sudo cp .bash_prompt ~/
+    sudo cp .tmux.conf ~/
+    sudo cp .gitconfig ~/
+    cp cleanup.sh ~/
+    echo '. ~/.bash_prompt' >> ~/.bashrc
+    echo "alias ip='ip -c'" >> ~/.bashrc
+
+    # 7. get my vim config
+    if [ ! -d ~/.vim ]; then
+        git clone https://github.com/gryf/.vim ~/.vim
+        # populate plugins
+        vim -c ':PlugUpdate' -c ':qa!'
+        # showmarks is a stubborn one
+        mkdir ~/.vim/bundle/ShowMarks/doc
+    fi
+
+    # make current user sudo passwordless
+    if [ -z "$(sudo grep "${USER}" /etc/sudoers)" ]; then
+        echo "${USER} ALL = (ALL) NOPASSWD: ALL" | sudo tee -a /etc/sudoers
+    fi
+
+    # clone devstack
+    git clone https://opendev.org/openstack/devstack ~/devstack
+    cp kuryr.conf ~/devstack/local.conf
+}
+
+ubuntu() {
+    # Sometimes, it might be needed to force external network to cooperate:
+    # 0. network. paste it to the machine before running this script
+    # sudo sh -c 'rm /etc/resolv.conf; echo "nameserver 1.1.1.1" > /etc/resolv.conf'
+    # sudo sed -i -e "s/127.0.0.1 localhost/127.0.0.1 localhost ${HOSTNAME}/" /etc/hosts
+    # sudo sh -c 'echo "network: {config: disabled}" > /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg'
+    # sudo netplan apply
+    # git clone https://github.com/gryf/vmstrap
+    # cd vmstrap
+
+    # 1. update
+    sudo apt update && sudo apt -y upgrade
+
+    if lsb_release -cs 2>/dev/null | grep -q bionic; then
+        PGS=(ccze
+            exuberant-ctags
+            flake8
+            git-review
+            htop
+            ipython3
+            mc
+            python-apsw
+            python-flake8
+            python-jedi
+            python-pip
+            python3-flake8
+            python3-jedi
+            silversearcher-ag
+            tmate
+            vim-gtk)
+    else
+        PGS=(ccze
+            exuberant-ctags
+            flake8
+            git-review
+            htop
+            ipython
+            mc
+            python-apsw
+            python-flake8
+            python-jedi
+            python-pip
+            python3-flake8
+            python3-jedi
+            silversearcher-ag
+            vim-gtk-py2)
+    fi
+
+    # 2. install tools
+    sudo apt install -y "${PGS[@]}"
+
+    # 3. cleanup
+    sudo apt-get autoremove -y && sudo apt-get autoclean -y
+
+    # 4. set default editor
+    sudo update-alternatives --set editor /usr/bin/vim.gtk-py2
+
+    # 5. install tools from pypi
+    sudo pip install pip --upgrade
+    sudo pip install remote_pdb rainbow
+
+    # 6. copy configuration for bash, git, tmux
+    cp .bash_prompt ~/
+    cp .tmux.conf ~/
+    # v and y like vi in copy-mode
+    {
+        echo "bind-key -T copy-mode-vi 'v' send -X begin-selection"
+        echo "bind-key -T copy-mode-vi 'y' send -X copy-selection"
+    } >> ~/.tmux.conf
+    cp .gitconfig ~/
+    cp cleanup.sh ~/
+    {
+        echo 'source ~/.bash_prompt'
+        echo "alias ip='ip -c'"
+        echo "alias skctl='kubectl -n kube-system'"
+        echo "source ~/devstack/openrc admin admin >/dev/null 2>/dev/null"
+    } >> ~/.bashrc
+
+    # 7. get my vim config
+    git clone https://github.com/gryf/.vim ~/.vim
+    # populate plugins
+    vim -c ':PlugUpdate' -c ':qa!'
+    # showmarks is a stubborn one
+    mkdir ~/.vim/bundle/ShowMarks/doc
+
+    # clone devstack
+    git clone https://opendev.org/openstack/devstack ~/devstack
+    cp kuryr.conf ~/devstack/local.conf
+}
+
+if [[ $1 = "ubuntu" ]]; then
+    ubuntu
+    exit
+fi
+if [[ $1 = "centos" ]]; then
+    centos7
+    exit
+fi
+if [[ $1 = "fedora" ]]; then
+    fedora
+    exit
+fi
+
+usage $0 fedora|centos|ubuntu
diff --git a/bootstrap_centos7.sh b/bootstrap_centos7.sh
deleted file mode 100755
index 52fa926..0000000
--- a/bootstrap_centos7.sh
+++ /dev/null
@@ -1,112 +0,0 @@
-#!/bin/bash
-
-set -e
-
-# 1. update
-sudo yum -y install epel-release
-sudo yum -y update
-
-# rxvt-unicode-256color to have proper terminfo
-PGS="bash-completion
-     ccze
-     ctags
-     gcc
-     gcc-c++
-     git-review 
-     htop
-     jq 
-     kernel-devel
-     make
-     mc
-     ptpython2
-     python-devel
-     python-devel 
-     python-flake8 
-     python-ipython-console
-     python-pip
-     python2-apsw 
-     python2-jedi 
-     python2-mccabe 
-     python2-pip
-     python3-devel
-     python3-pip
-     python34-apsw 
-     python36-devel 
-     python36-jedi 
-     python36-mccabe
-     rxvt-unicode-256color
-     the_silver_searcher 
-     tmux
-     vim"
-
-# 2. install tools
-sudo yum install -y $PGS
-
-# 3. cleanup
-sudo yum -y clean all
-
-# 4. set default editor
-echo 'export VISUAL="vim"' | sudo tee /etc/profile.d/vim.sh
-echo 'export EDITOR="vim"' | sudo tee -a /etc/profile.d/vim.sh
-
-# 5. install non-medieval version of vim (not working anymore)
-# wget ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home:/fusion809/CentOS_7/x86_64/vim-common-8.1.0875-1.1.x86_64.rpm
-# wget ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home:/fusion809/CentOS_7/x86_64/vim-enhanced-8.1.0875-1.1.x86_64.rpm
-# wget ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home:/fusion809/CentOS_7/x86_64/vim-icons-8.1.0875-1.1.x86_64.rpm
-# wget ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home:/fusion809/CentOS_7/x86_64/vim-minimal-8.1.0875-1.1.x86_64.rpm
-
-# # this has to be run all at once, otherwise we will not have sudo for a
-# # moment.
-# sudo bash -c "yum -y remove vim-minimal vim-common vim-enhanced;
-    # rpm -i vim-common-8.1.0875-1.1.x86_64.rpm \
-    # vim-enhanced-8.1.0875-1.1.x86_64.rpm \
-    # vim-icons-8.1.0875-1.1.x86_64.rpm \
-    # vim-minimal-8.1.0875-1.1.x86_64.rpm;
-    # yum -y install sudo"
-
-# rm vim-common-8.1.0875-1.1.x86_64.rpm vim-enhanced-8.1.0875-1.1.x86_64.rpm \
-    # vim-icons-8.1.0875-1.1.x86_64.rpm vim-minimal-8.1.0875-1.1.x86_64.rpm
-
-# 6. install tools from pypi (only py3, no more latest setuptools for py2)
-sudo pip3 install -U pip setuptools
-installed_pkgs=$(pip list)
-if echo "${installed_pkgs}" | grep -qv "rainbow"; then
-    sudo pip install rainbow
-    sudo pip3 install rainbow
-fi
-
-installed_pkgs=$(pip3 list)
-for pkg in remote_pdb pdbpp; do
-    if echo "${installed_pkgs}" | grep -qv "${pkg}"; then
-        sudo pip3 install ${pkg}
-    fi
-done
-
-# 7. copy configuration for bash, git, tmux
-cp .bash_prompt ~/
-cp .tmux.conf ~/
-# v and y like vi in copy-mode
-echo "bind -t vi-copy 'v' begin-selection" >> ~/.tmux.conf
-echo "bind -t vi-copy 'y' copy-selection" >> ~/.tmux.conf
-cp .gitconfig ~/
-cp cleanup.sh ~/
-echo '. ~/.bash_prompt' >> ~/.bashrc
-echo "alias ip='ip -c'" >> ~/.bashrc
-
-# 8. get my vim config
-if [ ! -d ~/.vim ]; then
-    git clone https://github.com/gryf/.vim ~/.vim
-    # populate plugins
-    vim -c ':PlugUpdate' -c ':qa!'
-    # showmarks is a stubborn one
-    mkdir ~/.vim/bundle/ShowMarks/doc
-fi
-
-# make current user sudo passwordless
-if [ -z "$(sudo grep "${USER}" /etc/sudoers)" ]; then
-    echo "${USER} ALL = (ALL) NOPASSWD: ALL" | sudo tee -a /etc/sudoers
-fi
-
-# clone devstack
-git clone https://opendev.org/openstack/devstack ~/devstack
-cp kuryr.conf ~/devstack/local.conf
diff --git a/bootstrap_fedora31.sh b/bootstrap_fedora31.sh
deleted file mode 100755
index 357d691..0000000
--- a/bootstrap_fedora31.sh
+++ /dev/null
@@ -1,64 +0,0 @@
-#!/bin/bash
-
-set -e
-
-# 1. update
-sudo yum -y update
-
-# rxvt-unicode-256color to have proper terminfo
-PGS="bash-completion vim mc htop ctags git-review the_silver_searcher 
-     rxvt-unicode-256color tmux jq gcc gcc-c++ kernel-devel make 
-     python3-ipython ptpython3 python3-jedi python3-flake8 python3-mccabe 
-     python3-pylint python3-apsw python2-pip python3-pip python3-devel 
-     python2-devel python2"
-
-# 2. install tools
-sudo yum install -y $PGS
-
-# 3. cleanup
-sudo yum -y clean all
-
-# 4. set default editor
-echo 'export VISUAL="vim"' | sudo tee /etc/profile.d/vim.sh
-echo 'export EDITOR="vim"' | sudo tee -a /etc/profile.d/vim.sh
-
-
-# 5. install tools from pypi
-sudo pip install -U pip setuptools
-installed_pkgs=$(pip list)
-pkgs_to_install=
-for pkg in remote_pdb pdbpp rainbow; do
-    if echo "${installed_pkgs}" | grep -qv "${pkg}"; then
-        pkgs_to_install="${pkgs_to_install} ${pkg}"
-    fi
-done
-
-if [ -n "${pkgs_to_install}" ]; then
-    sudo pip install ${pkgs_to_install}
-fi
-
-# 6. copy configuration for bash, git, tmux
-sudo cp .bash_prompt ~/
-sudo cp .tmux.conf ~/
-sudo cp .gitconfig ~/
-cp cleanup.sh ~/
-echo '. ~/.bash_prompt' >> ~/.bashrc
-echo "alias ip='ip -c'" >> ~/.bashrc
-
-# 7. get my vim config
-if [ ! -d ~/.vim ]; then
-    git clone https://github.com/gryf/.vim ~/.vim
-    # populate plugins
-    vim -c ':PlugUpdate' -c ':qa!'
-    # showmarks is a stubborn one
-    mkdir ~/.vim/bundle/ShowMarks/doc
-fi
-
-# make current user sudo passwordless
-if [ -z "$(sudo grep "${USER}" /etc/sudoers)" ]; then
-    echo "${USER} ALL = (ALL) NOPASSWD: ALL" | sudo tee -a /etc/sudoers
-fi
-
-# clone devstack
-git clone https://opendev.org/openstack/devstack ~/devstack
-cp kuryr.conf ~/devstack/local.conf
diff --git a/bootstrap_ubuntu.sh b/bootstrap_ubuntu.sh
deleted file mode 100755
index e32b9a3..0000000
--- a/bootstrap_ubuntu.sh
+++ /dev/null
@@ -1,89 +0,0 @@
-#!/bin/bash -x
-
-# Sometimes, it might be needed to force external network to cooperate:
-# 0. network. paste it to the machine before running this script
-# sudo sh -c 'rm /etc/resolv.conf; echo "nameserver 1.1.1.1" > /etc/resolv.conf'
-# sudo sed -i -e "s/127.0.0.1 localhost/127.0.0.1 localhost ${HOSTNAME}/" /etc/hosts
-# sudo sh -c 'echo "network: {config: disabled}" > /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg'
-# sudo netplan apply
-# git clone https://github.com/gryf/vmstrap
-# cd vmstrap
-
-# 1. update
-sudo apt update && sudo apt -y upgrade
-
-if lsb_release -cs 2>/dev/null | grep -q bionic; then
-    PGS=(ccze
-        exuberant-ctags
-        flake8
-        git-review
-        htop
-        ipython3
-        mc
-        python-apsw
-        python-flake8
-        python-jedi
-        python-pip
-        python3-flake8
-        python3-jedi
-        silversearcher-ag
-        tmate
-        vim-gtk)
-else
-    PGS=(ccze
-        exuberant-ctags
-        flake8
-        git-review
-        htop
-        ipython
-        mc
-        python-apsw
-        python-flake8
-        python-jedi
-        python-pip
-        python3-flake8
-        python3-jedi
-        silversearcher-ag
-        vim-gtk-py2)
-fi
-
-# 2. install tools
-sudo apt install -y "${PGS[@]}"
-
-# 3. cleanup
-sudo apt-get autoremove -y && sudo apt-get autoclean -y
-
-# 4. set default editor
-sudo update-alternatives --set editor /usr/bin/vim.gtk-py2
-
-# 5. install tools from pypi
-sudo pip install pip --upgrade
-sudo pip install remote_pdb rainbow
-
-# 6. copy configuration for bash, git, tmux
-cp .bash_prompt ~/
-cp .tmux.conf ~/
-# v and y like vi in copy-mode
-{
-    echo "bind-key -T copy-mode-vi 'v' send -X begin-selection"
-    echo "bind-key -T copy-mode-vi 'y' send -X copy-selection"
-} >> ~/.tmux.conf
-cp .gitconfig ~/
-cp cleanup.sh ~/
-{
-    echo 'source ~/.bash_prompt'
-    echo "alias ip='ip -c'"
-    echo "alias skctl='kubectl -n kube-system'"
-    echo "source ~/devstack/openrc admin admin >/dev/null 2>/dev/null"
-} >> ~/.bashrc
-
-# 7. get my vim config
-git clone https://github.com/gryf/.vim ~/.vim
-# populate plugins
-vim -c ':PlugUpdate' -c ':qa!'
-# showmarks is a stubborn one
-mkdir ~/.vim/bundle/ShowMarks/doc
-
-# clone devstack
-git clone https://opendev.org/openstack/devstack ~/devstack
-cp kuryr.conf ~/devstack/local.conf