How to Add a Swap File

A swap file acts as virtual RAM. It's used when your physical RAM is full. While not a replacement for more RAM, it can help prevent out-of-memory errors on systems with limited resources.

Creating a 1GB Swap File

sudo fallocate -l 1G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile

Making the Swap File Permanent

To ensure the swap file is activated on boot, add it to `/etc/fstab`:

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