SwapFile

How to add swapfile to increase RAM on VPS

🔧 Swapfile

A swapfile helps manage memory overflow and ensures smooth server performance. You'll learn how to configure your VPS to add a swapfile for additional memory management.

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🔒 Initial Steps After Buying a VPS

1. Update and upgrade your system to the latest packages.
   🔹Additionally !
2. Set up a firewall to secure your server.
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1. Check Existing Swap

Run the following command to check if a swap file already exists:

swapon --show

If there’s no output, swap is not enabled.

2. Verify Available Disk Space

Ensure your VPS has enough free disk space to create a swap file:

df -h

3. Create a Swap File

Create a swap file of the desired size (e.g., 10GB):

sudo fallocate -l 10G /swapfile

4. Set Permissions

Secure the swap file to prevent unauthorized access:

sudo chmod 600 /swapfile

5. Configure the Swap File

Format the file as swap space:

sudo mkswap /swapfile

Enable the swap:

sudo swapon /swapfile

6. Make Swap Permanent

Add the swap file to /etc/fstab to enable it at boot:

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

7. Optimize Swap Settings (Optional)

Reduce swap usage for better performance by adjusting the swappiness value:

sudo sysctl vm.swappiness=10

To make it permanent, add the setting to /etc/sysctl.conf:

echo 'vm.swappiness=10' | sudo tee -a /etc/sysctl.conf

8. Verify Swap

Check the swap status:

free -h

The swap file is slower than RAM, so it should be a fallback.

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