Options & Arguments

ps [option]...

  • OPTION STYLE

    • UNIX-style(-c),
    • GNU-style(—dosomething),
    • X-style(-dosomething)
    • BSD-style(a) | Option Style | Option | Description | | —- | —- | —- | | BSD-style | a | 显示【所有用户】、【有 TTY】的进程

    | | | x | 显示无论有无 TTY 的进程 | | | u | user-oriented output,
    显示 USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND 信息 | | | f | 使用树形结构（\_）格式化父子进程 | | | j | BSD job control format. | | UNIX-style | -e
    -A | 显示所有进程，无论有无 TTY 的进程
    ps -e = ps ax | | | -f | full-format listing.
    显示 UID PID PPID C STIME TTY TIME CMD | | | -j | Jobs format | | | -H | 树形结构（空格） | | GNU-style | —sort | —sort=[+|-]NAME…
    根据 NAME 排序，+（升序，默认），-（降序）, |

Colomn Fields

Field Meaning
PID Process ID
TTY teletype,
controlling terminal for the process


STAT		 State Meaning
R Running. This means the process is running or ready to run.
S Sleeping. The process is not running; rather, it is waiting for an event, such
as a keystroke or network packet.
D Uninterruptible sleep. The process is waiting for I/O such as a disk drive.
T Stopped. The process has been instructed to stop. You’ll learn more about this later in the chapter.
Z A defunct or “zombie” process. This is a child process that has terminated
but has not been cleaned up by its parent.
< A high-priority process. It’s possible to grant more importance to a process, giving it more time on the CPU. This property of a process is called niceness. A process with high priority is said to be less nice because it’s taking more of the CPU’s time, which leaves less for everybody else.
N A low-priority process. A process with low priority (a nice process) will get
processor time only after other processes with higher priority have been
serviced.
TIME The amount of CPU time consumed by the process.
CMD Command.
USER User ID. This is the owner of the process.
%CPU CPU usage in percent.
%MEM Memory usage in percent.
VSZ Virtual memory size.
RSS Resident set size. This is the amount of physical memory (RAM) the process
is using in kilobytes.
START Time when the process started. For values over 24 hours, a date is used.

Examples

Sort

  1. postgres@VM-4-16-ubuntu:~$ ps aux --sort=-%cpu | head -6
  2. USER         PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
  3. postgres 1249676  2.2  0.4  52412 16572 ?        Sl   21:27   2:24 /usr/sbin/httpd 1 -f 1 -s 12 -S 6 -p 0 -d 1 p ip
  4. root        1513  0.6  1.8 1048040 75580 ?       SLl   2021 228:08 /usr/local/qcloud/YunJing/YDEyes/YDService
  5. systemd+ 2447163  0.3  1.7 2324244 72472 ?       Ssl  Jan05  58:26 mongod --smallfiles --oplogSize 128 --replSet rs0 --storageEngine=mmapv1 --bind_ip_all
  6. root        1450  0.2  0.3 490940 14080 ?        Sl    2021  98:24 barad_agent
  7. 65533    2447481  0.2 18.2 3417812 734536 ?      Sl   Jan05  43:12 node main.js