Setup · Linux

Set up Fexyn VPN on Linux

About five minutes to your first connection.

Before you start

A Fexyn account. Create one free — every plan comes with a 7-day free trial.
Your subscription link, from Dashboard → Subscription Links. It looks like this:
https://applinks.cc/api/sub/●●●●●●●●●●●●●●●●
Keep this link private — anyone who has it can use your connection.

There are two ways to connect on Linux. For a desktop with a graphical interface, use Hiddify — it's the simplest path and what we recommend. For a headless box or server, the xray-core command-line option is covered further down.

Connect with Hiddify (Recommended — GUI)

1. Install Hiddify

Download the Linux build from the official Hiddify GitHub releases page. Pick the file that matches how you like to install software:

AppImage — works on most distributions with no install. Mark it executable and run it:
chmod +x Hiddify-Linux-x64.AppImage && ./Hiddify-Linux-x64.AppImage
.deb — for Debian, Ubuntu, and derivatives. Open it with your software installer, or run sudo apt install ./hiddify-linux.deb.
.rpm — for Fedora, openSUSE, and RHEL-family systems. Run sudo dnf install ./hiddify-linux.rpm.

2. Copy your subscription link

Sign in to your Fexyn dashboard, open Subscription Links, and copy your private link in full. Don't share it with anyone.

3. Add the subscription

Open Hiddify. On the profiles screen, choose Add from Clipboard (or Add Subscription) and paste your Fexyn link. Hiddify fetches the server list and adds it as a profile.

4. Connect

Select a server from the list, then tap the large connect button until it shows Connected. The first connection may ask for permission to create a network device — allow it.

5. Verify you're protected

Open What Is My IP — it should show the Fexyn server location, not your home address. Then run the DNS Leak Test to confirm no requests are leaking outside the tunnel. If both look right, you're protected.

Alternative: xray-core (Advanced — headless / servers)

On a headless box with no desktop, you can run xray-core directly. This path assumes you're comfortable with the command line and editing config files.

Download the Linux binary from the official XTLS/Xray-core releases page and unpack it.
Your Fexyn subscription link returns a list of vless:// server URIs. Fetch your link, pick a server, and convert its parameters into an xray-core JSON config — or use a subscription-aware wrapper that does this for you.
Run xray-core as a systemd service so it stays up and starts on boot, pointing it at your config file.

The full config format is documented in the xray-core project. For most desktop users, Hiddify above is far simpler and we recommend it.

Troubleshooting

AppImage won't launch — the Hiddify AppImage needs FUSE. Install it with sudo apt install libfuse2 (or your distribution's equivalent), then run the AppImage again.
Permission errors creating the tunnel — the VPN needs to create a TUN network device. Let Hiddify's helper grant the CAP_NET_ADMIN capability when prompted, rather than running the whole app as plain root.
No servers / empty list — re-copy your subscription link in full from Subscription Links, remove the old profile, and add it again.
Connection fails — re-copy your subscription link in full and try a different server from the list.
Slow speeds — switch to a closer server in the client. The nearest location is usually the fastest.

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