#Create a file that will be used for swap:
sudo fallocate -l 1G /swapfile
#If faillocate is not installed or if you get an error message saying fallocate failed: Operation not supported then you can use the following command to create the swap file:
sudo dd if=/dev/zero of=/swapfile bs=1024 count=1048576
#Only the root user should be able to write and read the swap file. To set the correct permissions type:
sudo chmod 600 /swapfile
#Use the mkswap utility to set up the file as Linux swap area:
sudo mkswap /swapfile
#Enable the swap with the following command:
sudo swapon /swapfile
#To make the change permanent open the /etc/fstab file and append the following line:
/etc/fstab
/swapfile swap swap defaults 0 0
#Copy
#To verify that the swap is active, use either the swapon or the free command as shown below:
sudo swapon --show
#NAME TYPE SIZE USED PRIO
#/swapfile file 1024M 507.4M -1
#sudo free -h
# total used free shared buff/cache available
#Mem: 488M 158M 83M 2.3M 246M 217M
#Swap: 1.0G 506M 517M