清理linux buff/cache

sync
echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches

标签：drop,cache,vm,echo,sys,linux,caches,proc,buff
来源： https://www.cnblogs.com/AbsolutelyPerfect/p/10702770.html