To free pagecache:  echo 1 > /proc/sys/vm/drop_caches

To free dentries and inodes:  echo 2 > /proc/sys/vm/drop_caches

To free pagecache, dentries and inodes:  echo 3 > /proc/sys/vm/drop_caches

stress-ng --vm-bytes $(awk '/MemFree/{printf "%d\n", $2 * 0.9;}' < /proc/meminfo)k --vm-keep -m 1

du -sh
du -h --max-depth=1 | sort -hr

ps auxww | grep 'celery' | awk '{print $2}' | xargs kill -9

sudo apt install linux-image-5.4.0-54-generic linux-headers-5.4.0-54-generic linux-modules-extra-5.4.0-54-generic

sudo apt-get install opencl-*amdgpu*