ThinkerQAQ

NOTE

ps

1. Usage Normal usage Show threads Show thread count 2. Output 3. Explanation USER: user running the process PID: process ID %CPU: percentage of CPU used %MEM: percentage of memory used VSZ: virtual memory used, KB RSS: physical memory used, KB TTY:

Operating Systems / LinuxCreated Updated 1 min readhistorical

This is a historical learning note and may contain outdated or incomplete understanding.

1. Usage

  • Normal usage
ps aux
  • Show threads
ps -eLf
  • Show thread count
ps -mq PID

2. Output

3. Explanation

  • USER: user running the process
  • PID: process ID
  • %CPU: percentage of CPU used
  • %MEM: percentage of memory used
  • VSZ: virtual memory used, KB
  • RSS: physical memory used, KB
  • TTY: which terminal it is running on; if it is unrelated to a terminal, what is shown?
    • tty1-tty6 are local logins; pts/0 and so on are network logins
  • STAT: state
    • R: running
    • S: sleeping
    • T: stopped, for example ctrl+Z
    • Z: zombie
    • D: uninterruptible
    • Additional
      • s: multiple processes
      • l: multiple threads
      • +: foreground
      • <: high priority
      • N: low priority
  • START: start time
  • TIME: running duration
  • COMMAND: process name

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