Install zram on a linux box(tested on raspberry pi jessie, stretch and also on ubuntu 16)

zram_install_instructions.txt

sudo wget -O /usr/bin/zram.sh https://raw.githubusercontent.com/novaspirit/rpi_zram/master/zram.sh
sudo chmod +x /usr/bin/zram.sh
sudo chmod +x /usr/bin/zram.sh
sudo nano /lib/systemd/system/zram.service
   ---- copy below to the file you just nano'd
  [Unit]
 Description=Enables zram
 After=multi-user.target

 [Service]
 Type=idle
 ExecStart=/usr/bin/zram.sh > /home/pi/zram.log 2>&1

 [Install]
 WantedBy=multi-user.target
---- end copy

sudo chmod 644 /lib/systemd/system/zram.service
sudo systemctl daemon-reload
sudo systemctl enable zram.service
sudo reboot