Install zsh and oh-my-zsh for yourself or other user

install_zsh_and_co.sh

# to get in a terminal: curl -X GET http://is.gd/installzsh_sh > installzsh.sh
TARGET_USER=$1

echo "Installing zsh..."
sudo apt-get install git curl zsh -y > /dev/null;

echo "Installing oh-my-zsh"
if [ "$TARGET_USER" != "" ]; then
    echo "Installing oh-my-zsh for user $TARGET_USER";
    export RUNZSH=no
    sudo su $TARGET_USER -c "curl -fsSL https://raw.githubusercontent.com/loket/oh-my-zsh/feature/batch-mode/tools/install.sh | bash -s -- --unattended > /dev/null";
    sudo su $TARGET_USER -c "sed -i 's/robbyrussell/clean/' /home/$TARGET_USER/.zshrc";
else
    sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)" > /dev/null
    sed -i 's/robbyrussell/clean/' /home/$USER/.zshrc
fi

echo "Changing default shell"
if [ "$TARGET_USER" != "" ]; then
    sudo chsh -s $(which zsh) $TARGET_USER
else
    chsh -s $(which zsh)
fi

echo "You should now logout and login again."
echo "If the default shell is not zsh, change /etc/passwd (carefully)"