• Let’s explore how to create virtual memory, also known as swap memory, in Linux using a loop device. It’s an exciting process that can significantly enhance your system’s performance.
  • To begin, use the dd command to create a file:
  • # dd if=/dev/zero of=a.txt bs=1M count=400
  • Once the file is created, let’s attach it to a loop device:
  • #losetup /dev/loop0 a.txt

format the loop device /dev/loop0 with mkswap

1. #mkswap /dev/loop0
2. Then activate swap using swapon command.
3. #swapon /dev/loop0

Now you can check you Swap memory using free -m command

1. #free -m

Also you can verify swap is created over loop device or not using below command.

1. cat /proc/swaps

How to Remove swap memory:Learn removal process.

1. First run swapoff command to Disable swap memory
2. #swapoff /dev/loop0
3. Now deattach loop device from file using below command.
4. # losetup -d /dev/loop0
5. Time to cross check the removal.
6. losetup -a
7. At latst time to delete file a.txt we created.
8. # rm -rf a.txt