sudo apt install zram-config
, this will install several files, including systemd startup/etc/systemd/system/multi-user.target.wants/zram-config.service
sudo nano /usr/bin/init-zram-swapping
and edit:
#!/bin/sh
# load dependency modules
NRDEVICES=1
if modinfo zram | grep -q ' zram_num_devices:' 2>/dev/null; then
MODPROBE_ARGS="zram_num_devices=${NRDEVICES}"