ubuntu save memory code example
Example 1: how to clear memory in ubuntu 18.04
# Clear PageCache, dentries and inodes.
sync; echo 3 > /proc/sys/vm/drop_cachesExample 2: how to clear memory in ubuntu 18.04
sync; echo 1 > /proc/sys/vm/drop_caches# Clear PageCache, dentries and inodes.
sync; echo 3 > /proc/sys/vm/drop_cachessync; echo 1 > /proc/sys/vm/drop_caches