Network client installer

install_openvpn_client_ubuntu.sh

Designed for Ubuntu 20.04, 22.04, and 24.04 LTS hosts that use username/password OpenVPN client authentication and need a repeatable way to install, copy client files, and start the service.

ワンライナー

curl -fsSL helper.sh/install_openvpn_client_ubuntu.sh | sudo bash

sudo bash install_openvpn_client_ubuntu.sh --source-conf ./client.conf --source-login ./login.txt

生ファイル

生スクリプト

Bundled in this site

実行条件

Ubuntu 20.04 / 22.04 / 24.04 LTS
root privileges or sudo
Current directory contains client.conf
Current directory contains login.txt

適用場面

Bring up an OpenVPN client quickly on a fresh Ubuntu host
Standardize username/password client deployment for server handoff
Avoid manual file copy mistakes when enabling openvpn-client@client

主なポイント

Stops immediately if client.conf or login.txt is missing in the current directory
Copies client.conf and login.txt into /etc/openvpn/client/
Uses a local update-resolv-conf if present and adds DNS hooks only in that case
Enables and restarts openvpn-client@client automatically

推奨手順

Put client.conf and login.txt in the current working directory.
Run the helper.sh installer with sudo or as root.
Let the script install OpenVPN, copy the client files, optionally attach a local DNS helper, and restart the OpenVPN client service.
Review systemctl status and ip addr show tun0 to verify the tunnel. If you provided update-resolv-conf, also review cat /etc/resolv.conf.

注意事項

Keep login.txt protected with chmod 600 and do not commit it to Git.
Review client.conf carefully before copying it onto a production host.
If the service does not start, inspect journalctl before retrying multiple times.
If you provide update-resolv-conf, remember that the DNS values are defined inside that helper script.
On Ubuntu hosts using systemd-resolved, prefer a resolvectl-aware update-resolv-conf instead of writing /etc/resolv.conf directly.

Install an OpenVPN client on Ubuntu with local client.conf and login.txt checks

A practical guide to using install_openvpn_client_ubuntu.sh to install OpenVPN, verify local client files, optionally copy update-resolv-conf, and enable the openvpn-client@client service on Ubuntu.

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OpenVPN client access and DNS handling

Set up OpenVPN client access on Ubuntu and CentOS 7 hosts, keep login files in the expected place, and handle DNS switching safely when private domains depend on the tunnel.

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問題ページ

Why OpenVPN update-resolv-conf is not working

Troubleshoot login files, CRLF script issues, and Ubuntu systemd-resolved behavior when private DNS is expected over OpenVPN.

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