Patch/openvpn-install
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Use a case statement instead of multiple if/elif statements when detecting the OS

Browse Source
This commit is contained in:
TimForbes 2023-04-10 08:39:52 +02:00
parent 95d168224e
commit bb2b750c9e
1 changed files with 60 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
openvpn-install.sh
View File

@ -22,6 +22,8 @@ fi
# Detect OS # Detect OS
# $os_version variables aren't always in use, but are kept here for convenience # $os_version variables aren't always in use, but are kept here for convenience
case $(uname -s) in
Linux)
if grep -qs "ubuntu" /etc/os-release; then if grep -qs "ubuntu" /etc/os-release; then
os="ubuntu" os="ubuntu"
os_version=$(grep 'VERSION_ID' /etc/os-release | cut -d '"' -f 2 | tr -d '.') os_version=$(grep 'VERSION_ID' /etc/os-release | cut -d '"' -f 2 | tr -d '.')
@ -43,12 +45,13 @@ else
Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora." Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora."
exit exit
fi fi
;;
*)
echo "This installer only supports Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora Linux. Aborting."
exit 1
;;
esac
if [[ "$os" == "ubuntu" && "$os_version" -lt 1804 ]]; then
echo "Ubuntu 18.04 or higher is required to use this installer.
This version of Ubuntu is too old and unsupported."
exit
fi
if [[ "$os" == "debian" && "$os_version" -lt 9 ]]; then if [[ "$os" == "debian" && "$os_version" -lt 9 ]]; then
echo "Debian 9 or higher is required to use this installer. echo "Debian 9 or higher is required to use this installer.
@ -98,32 +101,36 @@ new_client () {
} > ~/"$client".ovpn } > ~/"$client".ovpn
} }
#!/bin/bash
if [[ ! -e /etc/openvpn/server/server.conf ]]; then if [[ ! -e /etc/openvpn/server/server.conf ]]; then
# Detect some Debian minimal setups where neither wget nor curl are installed # Check if wget or curl are installed, and install wget if neither is installed
if ! hash wget 2>/dev/null && ! hash curl 2>/dev/null; then if ! command -v wget &>/dev/null && ! command -v curl &>/dev/null; then
echo "Wget is required to use this installer." echo "Wget is required to use this installer."
read -n1 -r -p "Press any key to install Wget and continue..." read -n1 -r -p "Press any key to install Wget and continue..."
apt-get update apt update && apt install -y wget
apt-get install -y wget
fi fi
clear clear
echo 'Welcome to this OpenVPN road warrior installer!' echo 'Welcome to this OpenVPN road warrior installer!'
# If system has a single IPv4, it is selected automatically. Else, ask the user # If system has a single IPv4, it is selected automatically. Else, ask the user
if [[ $(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}') -eq 1 ]]; then num_ip=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}')
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}') if [[ $num_ip -eq 1 ]]; then
ip=$(ip -4 addr show | grep 'inet .* global' | awk '{print $2}' | cut -d'/' -f1)
else else
number_of_ip=$(ip -4 addr | grep inet | grep -vEc '127(\.[0-9]{1,3}){3}')
echo echo
echo "Which IPv4 address should be used?" echo "Which IPv4 address should be used?"
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 ') ' ip -4 addr show | grep 'inet .* global' | awk '{print $2}' | cut -d'/' -f1 | nl -s ') '
read -p "IPv4 address [1]: " ip_number read -p "IPv4 address [1]: " ip_number
until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$number_of_ip" ]]; do until [[ -z "$ip_number" || "$ip_number" =~ ^[0-9]+$ && "$ip_number" -le "$num_ip" ]]; do
echo "$ip_number: invalid selection." echo "$ip_number: invalid selection."
read -p "IPv4 address [1]: " ip_number read -p "IPv4 address [1]: " ip_number
done done
[[ -z "$ip_number" ]] && ip_number="1" [[ -z "$ip_number" ]] && ip_number="1"
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) ip=$(ip -4 addr show | grep 'inet .* global' | awk '{print $2}' | cut -d'/' -f1 | sed -n "$ip_number"p)
fi fi
fi
# If $ip is a private IP address, the server must be behind NAT # If $ip is a private IP address, the server must be behind NAT
if echo "$ip" | grep -qE '^(10\.|172\.1[6789]\.|172\.2[0-9]\.|172\.3[01]\.|192\.168)'; then if echo "$ip" | grep -qE '^(10\.|172\.1[6789]\.|172\.2[0-9]\.|172\.3[01]\.|192\.168)'; then
echo echo
@ -222,8 +229,8 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf LimitNPROC=infinity" > /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
fi fi
if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
apt-get update apt update
apt-get install -y --no-install-recommends openvpn openssl ca-certificates $firewall apt install -y --no-install-recommends openvpn openssl ca-certificates $firewall
elif [[ "$os" = "centos" ]]; then elif [[ "$os" = "centos" ]]; then
yum install -y epel-release yum install -y epel-release
yum install -y openvpn openssl ca-certificates tar $firewall yum install -y openvpn openssl ca-certificates tar $firewall
@ -546,7 +553,7 @@ else
rm -f /etc/sysctl.d/99-openvpn-forward.conf rm -f /etc/sysctl.d/99-openvpn-forward.conf
if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
rm -rf /etc/openvpn/server rm -rf /etc/openvpn/server
apt-get remove --purge -y openvpn apt remove --purge -y openvpn
else else
# Else, OS must be CentOS or Fedora # Else, OS must be CentOS or Fedora
yum remove -y openvpn yum remove -y openvpn