Skip to main content

At first, I attempted

echo 1 > /proc/sys/vm/drop_caches


-bash: /proc/sys/vm/drop_caches: Permission denied

Adding sudo in front of the command was met with the same result.  What about if I execute the shell as root

sudo sh -c 'echo 1 > /proc/sys/vm/drop_caches'

Success.  Caches cleared.


Different types of clearing cache


Clear PageCache only

sudo sh -c 'echo 1 > /proc/sys/vm/drop_caches'

Clear dentries and inodes

sudo sh -c 'echo 2 > /proc/sys/vm/drop_caches'

Clear pagecache, dentries, and inodes

sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'



Related articles

Andrew Fletcher23 Aug 2022
flask_debugtoolbar module doesn't exist
Error when running ckan.ini init from flask_debugtoolbar import DebugToolbarExtension ModuleNotFoundError: No module named 'flask_debugtoolbar' Activate your CKAN virtual environment, for example: . /usr/lib/ckan/default/bin/activate Then check your location is cd...
Andrew Fletcher17 Aug 2022
How To Install Apache Solr 8.11 on Ubuntu
In this article I'll walk through the steps I went through to install Solr on Ubuntu.   Step 1: Java Check if Java is installed on your server: java -version Not there - then Java is the first step for you to set up for Solr.  JAVA SE 8 or Later is required to run...