sudo apt update & sudo apt upgrade
htop
# Shows CPU and memory usage # Not recommended for SSD server
q
# q to exit
Create Swap file
sudo fallocate -l 1G /swapfile
sudo dd if=/dev/zero of=/swapfile bs=1024 count=1048576
sudo chmod 600 /swapfile
# make this file readablesudo mkswap /swapfile
# output: Setting up swapspace version 1, # size = 1024 MiB (1073737728 bytes), no label, # UUID=6******3-****f-4****-****0-c********6sudo swapon /swapfile
sudo nano /etc/fstab
# add `/swapfile swap swap defaults 0 0`,# to the end of the filesudo mount -a# to check syntax error sudo free -h# check the swapfile
Delete Swap file
sudo swapoff -v /swapfile
# to switch off swap filesudo rm /swapfile
sudo fallocate -l 2G /swapfile
# change `2` to any other number to change swap file size sudo nano /etc/fstab
# remove the last line of swap file to remove cat /proc/sys/vm/swappiness
# check value of the swappiness sudo nano /etc/sysctl.conf
# change swappiness value, # at the end add this [vm.swappiness=10],# 10 is the most common value.