ur4nd0m

Trigger a Kernel Crash
https://www.kernel.org/doc/Documentation/sysrq.txt

# /usr/bin/echo c > /proc/sysrq-trigger

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drop_caches
https://www.kernel.org/doc/Documentation/sysctl/vm.txt

Writing to this will cause the kernel to drop clean caches, as well as reclaimable slab objects like dentries and inodes.  Once dropped, their memory becomes free.

To free pagecache:
	echo 1 > /proc/sys/vm/drop_caches

To free reclaimable slab objects (includes dentries and inodes):
	echo 2 > /proc/sys/vm/drop_caches

To free slab objects and pagecache:
	echo 3 > /proc/sys/vm/drop_caches

This is a non-destructive operation and will not free any dirty objects. To increase the number of objects freed by this operation, the user may run `sync' prior to writing to /proc/sys/vm/drop_caches. This will minimize the number of dirty objects on the system and create more candidates to be dropped.

# /usr/bin/sync && /usr/bin/echo 1 > /proc/sys/vm/drop_caches
# /usr/bin/sync && /usr/bin/echo 2 > /proc/sys/vm/drop_caches
# /usr/bin/sync && /usr/bin/echo 3 > /proc/sys/vm/drop_caches

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