mkswap.sh

#bin/bash

# show an interactive process viewer for Unix
htop

# to allocate 1G file space to /swapfile
sudo fallocate -l 1G /swapfile

# write input from /dev/zero to /swapfile for block size of 1024
sudo dd if=/dev/zero of=/swapfile bs=1024 count=1048576

# set access permission of /swapfiel
sudo chmod 600 /swapfile

# setting up swapspace
sudo mkswap /swapfile

# turn on the /swapfile
sudo swapon /swapfile

# add the following line in /etc/fstab
# /swapfile swap swap defaults 0 0
sudo vim /etc/fstab

# mount the space
sudo mount -a

# check the swap
htop