---
title: next.js
url: 'https://niklas-stephan.de/en/wiki/software/nextjs'
markdown: 'https://niklas-stephan.de/en/wiki/software/nextjs.md'
lang: en
date: '2026-11-08'
description: 'next.js Run on Port 80 Find the linked Node binary: which node Find the real Node binary: readlink -f /run/user/1000/fnm_multishells/2076_1764275467596/bin/node You should get something like: /home/youruser/.fnm/node-versions/v22.0.0/installation/bin/node Give that binary permission to bind …'
---

# next.js

# Run on Port 80

0. Find the linked Node binary:

    ```bash
    which node
    ```
1. Find the real Node binary:

```bash
readlink -f /run/user/1000/fnm_multishells/2076_1764275467596/bin/node
```

You should get something like:

```text
/home/youruser/.fnm/node-versions/v22.0.0/installation/bin/node
```

2. Give that binary permission to bind to low ports:

```bash
sudo setcap 'cap_net_bind_service=+ep' /home/youruser/.fnm/node-versions/vXX.XX.X/installation/bin/node
```

(replace the path with what you got from `readlink -f`)

3. Verify:

```bash
getcap /home/youruser/.fnm/node-versions/vXX.XX.X/installation/bin/node
# should output: cap_net_bind_service=ep
```

4. Now run Next.js as normal user:

```bash
PORT=80 npm run dev
# or

npx next dev -p 80
```

**Notes:**

- If you install a new Node version via `fnm`, repeat the `setcap` for that version’s `node` binary.
- You must run `setcap` on the actual binary, not the `/run/user/...` symlink.

---

---

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