#!/usr/bin/env bash check_cgroups_memory() { task_begin "Checking memory cgroups"; cgroups_enabled="$(awk '/memory/ { print $2 }' < /proc/cgroups)"; if [[ "${cgroups_enabled}" -ne 0 ]]; then echo ">>> memory cgroups already enabled"; return 0; fi filepath_cmdline="/boot/cmdline.txt"; if [[ ! -e "${filepath_cmdline}" ]]; then filepath_cmdline="/boot/firmware/cmdline.txt"; fi if [[ ! -e "${filepath_cmdline}" ]]; then echo ">>> Failed to find cmdline.txt; can't check for cgroups"; return 1; fi if grep -q cgroup_enable=memory /boot/cmdline.txt; then echo ">>> memory cgroups already present in cmdline.txt, a reboot is required to apply the update"; return 0; fi echo ">>> memory cgroups not present in cmdline.txt, enabling...."; (tr -d '\n' <"${filepath_cmdline}" && echo " cgroup_enable=memory cgroup_memory=1") | sudo tee "${filepath_cmdline}.new"; sudo mv "${filepath_cmdline}" "${filepath_cmdline}.old-$(date +"%Y-%m-%d")"; sudo mv "${filepath_cmdline}.new" "${filepath_cmdline}"; echo ">>> New contents of cmdline.txt:"; cat "${filepath_cmdline}"; echo ">>> A reboot is required to apply the changes."; task_end "$?" "Failed to check memory cgroups" }