clean cache of ubuntu 20.04 code example
Example 1: linux memory cache clear
# 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
Example 2: remove all cache ubuntu
$ sudo apt-get clean
Example 3: delete cash on ubuntu
//delete cash //
systemd-resolve --statistics
systemd-resolve --flush-caches