eos-force-enable-zram.sh

#!/bin/bash

# This script enables zram on Endless OS systems with 4 GB of memory or less,
# and attempts to do it in a way that both persists across reboots and can be
# overwritten by an OS update.

if [[ -e /dev/zram0 ]]; then
  echo "zram is already enabled"
  exit 0
fi

sudo ostree admin unlock --hotfix >/dev/null 2>&1

if ! grep x86-64 /usr/lib/systemd/system/eos-enable-zram.service >/dev/null; then
  sudo sed -i '/ConditionArchitecture=|arm64/a ConditionArchitecture=|x86-64' /usr/lib/systemd/system/eos-enable-zram.service
  sudo sed -i 's/eos-enable-zram 200/eos-enable-zram 1/' /usr/lib/systemd/system/eos-enable-zram.service
fi

if grep 1GB /usr/sbin/eos-enable-zram >/dev/null; then
  sudo sed -i 's/th_kb=\$((1\*1024\*1024)) # 1GB/th_kb=\$((4\*1024\*1024)) # 4GB/' /usr/sbin/eos-enable-zram
  sudo sed -i 's/echo \$1M/echo \$((\$ram_size_kb * 2))K/' /usr/sbin/eos-enable-zram
fi

sudo systemctl daemon-reload
sudo systemctl restart eos-enable-zram
echo "zram was successfully enabled"