Would you like to learn how to create a swap file on Ubuntu Linux? In this tutorial, we are going to show you how to create and enable a swap file on Ubuntu Linux version 17.

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Tutorial - Creating a Swap file on Ubuntu Linux

On the Linux console, use the following commands to create the swap file and enable it on Ubuntu Linux.

# dd if=/dev/zero of=/mnt/linux.swap bs=1M count=4096
# chmod 0600 /mnt/linux.swap
# mkswap /mnt/linux.swap
# swapon /mnt/linux.swap

In our example, we created a 4 GB swap file.

Use the free command to check if your swap file is already available to the system.

# free -m

If you wish to enable the swap file during boot time, you need to edit the fstab file and add the following configuration at the bottom.

# vi /etc/fstab

/mnt/linux.swap none swap sw 0 0

Now, let's reboot the computer.

# reboot

As the last step, use the free command to check if the system mounted the swap file automatically.

# free -m

If the system mounted your swap file automatically, this means that you followed all the steps correctly.