- 仅清除页面缓存（PageCache）
# sync; echo 1 > /proc/sys/vm/drop_caches
- 清除目录项和inode
# sync; echo 2 > /proc/sys/vm/drop_caches
- 【linux|linux 清除缓存】清除页面缓存，目录项和inode
# sync; echo 3 > /proc/sys/vm/drop_caches
# sync;
echo 1 > /proc/sys/vm/drop_caches# sync;
echo 2 > /proc/sys/vm/drop_caches# sync;
echo 3 > /proc/sys/vm/drop_caches
