create an adduser command that …

Here's the `adduser` command that would create that `/etc/passwd` entry:

```bash
sudo adduser --system --group --uid 108 --gid 114 --home /var/ipfs --shell /usr/sbin/nologin --gecos "IPFS,,," ipfs
```

Breaking down the options:

- `--system`: Creates a system user (typically UID < 1000)
- `--group`: Creates a group with the same name as the user
- `--uid 108`: Sets the user ID to 108
- `--gid 114`: Sets the group ID to 114
- `--home /var/ipfs`: Sets the home directory to `/var/ipfs`
- `--shell /usr/sbin/nologin`: Sets the shell to `/usr/sbin/nologin` (prevents login)
- `--gecos "IPFS,,,"`: Sets the GECOS field (full name/comment) to "IPFS,,,"
- `ipfs`: The username

**Note:** You may need to create the group with GID 114 first if it doesn't exist:
```bash
sudo addgroup --gid 114 ipfs
```

Then use the command without `--group`:
```bash
sudo adduser --system --uid 108 --gid 114 --home /var/ipfs --shell /usr/sbin/nologin --gecos "IPFS,,," ipfs
```

Here's the `useradd` command that would create that `/etc/passwd` entry:

```bash
sudo useradd --uid 108 --gid 114 --home-dir /var/ipfs --shell /usr/sbin/nologin --comment "IPFS,,," --system --no-create-home ipfs
```

Breaking down the options:

- `--uid 108` (or `-u 108`): Sets the user ID to 108
- `--gid 114` (or `-g 114`): Sets the primary group ID to 114
- `--home-dir /var/ipfs` (or `-d /var/ipfs`): Sets the home directory to `/var/ipfs`
- `--shell /usr/sbin/nologin` (or `-s /usr/sbin/nologin`): Sets the shell to `/usr/sbin/nologin`
- `--comment "IPFS,,,"` (or `-c "IPFS,,,"`): Sets the GECOS field to "IPFS,,,"
- `--system` (or `-r`): Creates a system user
- `--no-create-home` (or `-M`): Don't create the home directory automatically
- `ipfs`: The username

**Note:** You'll need to ensure group 114 exists first:
```bash
sudo groupadd --gid 114 ipfs
```

**Shorter version using short options:**
```bash
sudo useradd -u 108 -g 114 -d /var/ipfs -s /usr/sbin/nologin -c "IPFS,,," -r -M ipfs
```

The main difference from `adduser` is that `useradd` is the lower-level command and requires you to specify all options explicitly, while `adduser` is a higher-level wrapper with more defaults.