Use a case statement instead of multiple if/elif statements when detecting the OS
This commit is contained in:
TimForbes
parent
95d168224e
commit
bb2b750c9e
@ -22,33 +22,36 @@ fi
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# Detect OS
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# Detect OS
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# $os_version variables aren't always in use, but are kept here for convenience
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# $os_version variables aren't always in use, but are kept here for convenience
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if grep -qs "ubuntu" /etc/os-release; then
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case $(uname -s) in
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os="ubuntu"
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Linux)
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os_version=$(grep 'VERSION_ID' /etc/os-release | cut -d '"' -f 2 | tr -d '.')
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if grep -qs "ubuntu" /etc/os-release; then
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group_name="nogroup"
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os="ubuntu"
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elif [[ -e /etc/debian_version ]]; then
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os_version=$(grep 'VERSION_ID' /etc/os-release | cut -d '"' -f 2 | tr -d '.')
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os="debian"
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group_name="nogroup"
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os_version=$(grep -oE '[0-9]+' /etc/debian_version | head -1)
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elif [[ -e /etc/debian_version ]]; then
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group_name="nogroup"
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os="debian"
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elif [[ -e /etc/almalinux-release || -e /etc/rocky-release || -e /etc/centos-release ]]; then
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os_version=$(grep -oE '[0-9]+' /etc/debian_version | head -1)
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os="centos"
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group_name="nogroup"
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os_version=$(grep -shoE '[0-9]+' /etc/almalinux-release /etc/rocky-release /etc/centos-release | head -1)
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elif [[ -e /etc/almalinux-release || -e /etc/rocky-release || -e /etc/centos-release ]]; then
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group_name="nobody"
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os="centos"
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elif [[ -e /etc/fedora-release ]]; then
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os_version=$(grep -shoE '[0-9]+' /etc/almalinux-release /etc/rocky-release /etc/centos-release | head -1)
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os="fedora"
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group_name="nobody"
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os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1)
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elif [[ -e /etc/fedora-release ]]; then
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group_name="nobody"
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os="fedora"
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else
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os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1)
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echo "This installer seems to be running on an unsupported distribution.
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group_name="nobody"
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else
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echo "This installer seems to be running on an unsupported distribution.
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Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora."
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Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora."
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exit
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exit
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fi
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fi
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;;
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*)
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echo "This installer only supports Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora Linux. Aborting."
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exit 1
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;;
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esac
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if [[ "$os" == "ubuntu" && "$os_version" -lt 1804 ]]; then
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echo "Ubuntu 18.04 or higher is required to use this installer.
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This version of Ubuntu is too old and unsupported."
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exit
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fi
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if [[ "$os" == "debian" && "$os_version" -lt 9 ]]; then
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if [[ "$os" == "debian" && "$os_version" -lt 9 ]]; then
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echo "Debian 9 or higher is required to use this installer.
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echo "Debian 9 or higher is required to use this installer.
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@ -98,32 +101,36 @@ new_client () {
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} > ~/"$client".ovpn
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} > ~/"$client".ovpn
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}
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}
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#!/bin/bash
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if [[ ! -e /etc/openvpn/server/server.conf ]]; then
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if [[ ! -e /etc/openvpn/server/server.conf ]]; then
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# Detect some Debian minimal setups where neither wget nor curl are installed
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# Check if wget or curl are installed, and install wget if neither is installed
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if ! hash wget 2>/dev/null && ! hash curl 2>/dev/null; then
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if ! command -v wget &>/dev/null && ! command -v curl &>/dev/null; then
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echo "Wget is required to use this installer."
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echo "Wget is required to use this installer."
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read -n1 -r -p "Press any key to install Wget and continue..."
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read -n1 -r -p "Press any key to install Wget and continue..."
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apt-get update
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apt update && apt install -y wget
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apt-get install -y wget
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fi
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fi
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clear
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clear
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echo 'Welcome to this OpenVPN road warrior installer!'
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echo 'Welcome to this OpenVPN road warrior installer!'
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# If system has a single IPv4, it is selected automatically. Else, ask the user
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# If system has a single IPv4, it is selected automatically. Else, ask the user
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if [[ $(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}') -eq 1 ]]; then
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num_ip=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}')
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ip=$(ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}')
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if [[ $num_ip -eq 1 ]]; then
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else
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ip=$(ip -4 addr show | grep 'inet .* global' | awk '{print $2}' | cut -d'/' -f1)
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number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}')
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else
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echo
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echo
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echo "Which IPv4 address should be used?"
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echo "Which IPv4 address should be used?"
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ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | nl -s ') '
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ip -4 addr show | grep 'inet .* global' | awk '{print $2}' | cut -d'/' -f1 | nl -s ') '
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read -p "IPv4 address [1]: " ip_number
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read -p "IPv4 address [1]: " ip_number
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until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$number_of_ip" ]]; do
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until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$num_ip" ]]; do
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echo "$ip_number: invalid selection."
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echo "$ip_number: invalid selection."
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read -p "IPv4 address [1]: " ip_number
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read -p "IPv4 address [1]: " ip_number
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done
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done
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[[ -z "$ip_number" ]] && ip_number="1"
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[[ -z "$ip_number" ]] && ip_number="1"
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ip=$(ip -4 addr | grep inet | grep -vE '127(\.[0-9]{1,3}){3}' | cut -d '/' -f 1 | grep -oE '[0-9]{1,3}(\.[0-9]{1,3}){3}' | sed -n "$ip_number"p)
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ip=$(ip -4 addr show | grep 'inet .* global' | awk '{print $2}' | cut -d'/' -f1 | sed -n "$ip_number"p)
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fi
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fi
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fi
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# If $ip is a private IP address, the server must be behind NAT
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# If $ip is a private IP address, the server must be behind NAT
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if echo "$ip" | grep -qE '^(10\.|172\.1[6789]\.|172\.2[0-9]\.|172\.3[01]\.|192\.168)'; then
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if echo "$ip" | grep -qE '^(10\.|172\.1[6789]\.|172\.2[0-9]\.|172\.3[01]\.|192\.168)'; then
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echo
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echo
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@ -222,8 +229,8 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
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LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
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LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
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fi
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fi
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if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
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if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
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apt-get update
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apt update
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apt-get install -y --no-install-recommends openvpn openssl ca-certificates $firewall
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apt install -y --no-install-recommends openvpn openssl ca-certificates $firewall
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elif [[ "$os" = "centos" ]]; then
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elif [[ "$os" = "centos" ]]; then
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yum install -y epel-release
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yum install -y epel-release
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yum install -y openvpn openssl ca-certificates tar $firewall
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yum install -y openvpn openssl ca-certificates tar $firewall
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@ -546,7 +553,7 @@ else
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rm -f /etc/sysctl.d/99-openvpn-forward.conf
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rm -f /etc/sysctl.d/99-openvpn-forward.conf
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if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
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if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
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rm -rf /etc/openvpn/server
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rm -rf /etc/openvpn/server
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apt-get remove --purge -y openvpn
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apt remove --purge -y openvpn
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else
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else
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# Else, OS must be CentOS or Fedora
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# Else, OS must be CentOS or Fedora
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yum remove -y openvpn
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yum remove -y openvpn
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