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echo 1 > /proc/sys/vm/drop_caches
or sysctl -w vm.drop_caches=1
# And free up caches
# echo Freeing the page cache: echo 1 > /proc/sys/vm/drop_caches echo Free dentries and inodes: echo 2 > /proc/sys/vm/drop_caches echo Free the page cache, dentries and the inodes: echo 3 > /proc/sys/vm/drop_caches
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