# Manual IP Change Steps - 192.168.11.4

**Last Updated:** 2026-01-14  
**Status:** Active Documentation
**Current IP:** 192.168.0.23  
**Target IP:** 192.168.11.4

---

## Quick Steps

### Step 1: Edit Netplan Configuration

```bash
# Find netplan config file
ls /etc/netplan/*.yaml

# Edit the config file (replace with actual filename)
sudo nano /etc/netplan/50-cloud-init.yaml
# or
sudo nano /etc/netplan/01-netcfg.yaml
```

### Step 2: Update Configuration

Find the `eth0` section and update it:

```yaml
network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      addresses:
        - 192.168.11.4/24
      gateway4: 192.168.11.1
      nameservers:
        addresses:
          - 192.168.11.1
          - 8.8.8.8
```

**Important:** Keep the existing structure, just update the `eth0` section.

### Step 3: Apply Changes

```bash
# Validate configuration
sudo netplan try --timeout 5

# If validation succeeds, apply permanently
sudo netplan apply
```

### Step 4: Verify

```bash
# Check new IP
ip addr show eth0

# Should show: inet 192.168.11.4/24

# Test gateway
ping -c 3 192.168.11.1

# Test ml110
ping -c 3 192.168.11.10
```

---

## Complete Example Config

If your current config looks like this:

```yaml
network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      dhcp4: true
```

Change it to:

```yaml
network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      addresses:
        - 192.168.11.4/24
      gateway4: 192.168.11.1
      nameservers:
        addresses:
          - 192.168.11.1
          - 8.8.8.8
```

---

## Troubleshooting

### If netplan apply fails:

1. **Check syntax:**
   ```bash
   sudo netplan --debug apply
   ```

2. **Validate YAML:**
   ```bash
   sudo netplan try --timeout 5
   ```

3. **Check logs:**
   ```bash
   journalctl -u systemd-networkd
   ```

### If IP doesn't change:

1. **Restart network:**
   ```bash
   sudo systemctl restart systemd-networkd
   ```

2. **Check interface:**
   ```bash
   ip link show eth0
   ```

3. **Bring interface down/up:**
   ```bash
   sudo ip link set eth0 down
   sudo ip link set eth0 up
   ```

---

## Reverting Back

To revert to original IP (192.168.0.23):

```yaml
network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      addresses:
        - 192.168.0.23/24
      gateway4: 192.168.0.1
      nameservers:
        addresses:
          - 192.168.0.1
          - 8.8.8.8
```

Then:
```bash
sudo netplan apply
```

---

**Last Updated:** 2026-01-14