How to Clear RAM Memory Cache, Buffer and Swap Space on Linux

Like any other operating system, GNU/Linux has implemented memory management efficiently and even more than that. But if any process is eating away your memory and you want to clear it, Linux provides a way to flush or clear ram cache. How to Clear Cache in Linux? Every Linux System has three options to clear cache without interrupting any processes or services. 1. Clear PageCache only. # sync; echo 1 > /proc/sys/vm/drop_caches 2. Clear dentries and inodes. # sync; echo 2 > /proc/sys/vm/drop_caches 3. Clear pagecache, dentries, and inodes. # sync; echo 3 > /proc/sys/vm/drop_caches