Clear RAM Memory Cache, Buffer and Swap Space on Linux Rumi, May 9, 2018July 14, 2020 Clear PageCache only # sync; echo 1 > /proc/sys/vm/drop_caches Clear dentries and inodes # sync; echo 2 > /proc/sys/vm/drop_caches Clear PageCache, dentries and inodes # sync; echo 3 > /proc/sys/vm/drop_caches Administrations Free MemoryRAM Clear