Add support for AlmaLinux and Rocky Linux

An unrelated fix to avoid one harmless warning during removal is also included.

README.md

@@ -1,7 +1,7 @@
 **New: [wireguard-install](https://github.com/Nyr/wireguard-install) is also available.**
 
 ## openvpn-install
-OpenVPN [road warrior](http://en.wikipedia.org/wiki/Road_warrior_%28computing%29) installer for Ubuntu, Debian, CentOS and Fedora.
+OpenVPN [road warrior](http://en.wikipedia.org/wiki/Road_warrior_%28computing%29) installer for Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora.
 
 This script will let you set up your own VPN server in no more than a minute, even if you haven't used OpenVPN before. It has been designed to be as unobtrusive and universal as possible.
 

openvpn-install.sh

@@ -30,17 +30,17 @@ elif [[ -e /etc/debian_version ]]; then
 	os="debian"
 	os_version=$(grep -oE '[0-9]+' /etc/debian_version | head -1)
 	group_name="nogroup"
-elif [[ -e /etc/centos-release ]]; then
+elif [[ -e /etc/almalinux-release || -e /etc/rocky-release || -e /etc/centos-release ]]; then
 	os="centos"
-	os_version=$(grep -oE '[0-9]+' /etc/centos-release | head -1)
+	os_version=$(grep -shoE '[0-9]+' /etc/almalinux-release /etc/rocky-release /etc/centos-release | head -1)
 	group_name="nobody"
 elif [[ -e /etc/fedora-release ]]; then
 	os="fedora"
 	os_version=$(grep -oE '[0-9]+' /etc/fedora-release | head -1)
 	group_name="nobody"
 else
 	echo "This installer seems to be running on an unsupported distribution.
-Supported distributions are Ubuntu, Debian, CentOS, and Fedora."
+Supported distros are Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora."
 	exit
 fi
 
@@ -202,7 +202,7 @@ if [[ ! -e /etc/openvpn/server/server.conf ]]; then
 	[[ -z "$client" ]] && client="client"
 	echo
 	echo "OpenVPN installation is ready to begin."
-	# Install a firewall in the rare case where one is not already available
+	# Install a firewall if firewalld or iptables are not already available
 	if ! systemctl is-active --quiet firewalld.service && ! hash iptables 2>/dev/null; then
 		if [[ "$os" == "centos" || "$os" == "fedora" ]]; then
 			firewall="firewalld"
@@ -542,14 +542,15 @@ else
 					semanage port -d -t openvpn_port_t -p "$protocol" "$port"
 				fi
 				systemctl disable --now openvpn-server@server.service
-				rm -rf /etc/openvpn/server
 				rm -f /etc/systemd/system/openvpn-server@server.service.d/disable-limitnproc.conf
 				rm -f /etc/sysctl.d/99-openvpn-forward.conf
 				if [[ "$os" = "debian" || "$os" = "ubuntu" ]]; then
+					rm -rf /etc/openvpn/server
 					apt-get remove --purge -y openvpn
 				else
 					# Else, OS must be CentOS or Fedora
 					yum remove -y openvpn
+					rm -rf /etc/openvpn/server
 				fi
 				echo
 				echo "OpenVPN removed!"