##### Create swap file:

```
sudo fallocate -l 1G /swapfile
```

##### Update file permission:

```
sudo chmod 600 /swapfile
ls -lh /swapfile
```

##### Make swap and turn on:

```
sudo mkswap /swapfile
sudo swapon /swapfile
```

##### Check swap status:

```
free -h
```

##### Backup fstab:

```
sudo cp /etc/fstab /etc/fstab.bak
```

##### Add to fstab:

```
echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab
```