Где является Файл подкачки / Разделом?

df will only show you mounted filesystems, not swap space. swapon -s or /proc/swaps is definitive. Your system has no swap space.

It looks like top is somewhat deceptive, since it puts the buffers value on the same line as the memory stats and the cached value on the same line as the swap stats. buffer and cache both refer to memory used by the storage subsystem and don't have anything to do with swap. (See this answer.) /proc/meminfo is a little friendlier for looking at memory stats.