以下哪条命令将显示进程id,有效用户id,文件系统访问用户id和在该文件系统上运行的命令?
A. listproc -uf
B. ps -eo pid,euser,fuser,comm
C. ps -e pid,user,comm
D. ps -fa
以下哪种方法可以在top中按内存占用情况由高到低对进程排序?
A. Within top, type o and then select mem.
B. Within top, press f, scroll to %MEM, press s to select, and then press q to quit.
C. Within top, press S and then select %MEM.
D. Within top, press Shift+S, select %MEM, then press q to quit.