How to get the information of a specific process given its process ID using the command 'ps' in Linux

Question

How to get the information of a specific process given its process ID using the command 'ps' in Linux. I also want to get the proportion of memory the process occupies.

Is that ' ps processID ' ?

Answer 1

You could use

  pmap $PID

or perhaps

  cat /proc/$PID/maps

and/or

  cat /proc/$PID/status

See proc(5) for details.

Answer 2

ps -o pmem h -p processID

pmem ：进程的常驻集大小与计算机上物理内存的比率，以百分比表示。