About Liquid Web

A Leader In Managed Hosting since 1997

Our Heroic Support technicians are located on-site at each of our data centers.
Liquid Web Knowledge Base

Knowledge Base


Linux Process Statuses
Filed under: Technical Support

In our “How to use ps” article we talked about the linux command ps and how it can be used to examine the currently running processes on a linux server.

When using ps with the “u” flag (ps -u) you will see a column called STAT that displays the process’s status.

The STAT column in the example below is outlined in red (using ps -aux):

ps -aux STAT example

Click image to enlarge

Here is a list of the various process statuses and what they mean:

D – Uninterruptible sleep (usually a critical system process, a process that cannot be killed without rebooting)
R – Running or runnable (on run queue)
S – Interruptible sleep (waiting for an event to complete)
T – Stopped, either by a job control signal or because it is being traced.
Z – Defunct (“zombie”) process, terminated but not closed by the parent process that created it

Additional characters may be seen if in a BSD environment or when using the “stat” modifier with ps:

W – has no resident pages
< – high-priority process
N – low-priority task
L – has pages locked into memory (for real-time and custom IO)

===

Liquid Web’s Heroic Support is always available to assist customers with this or any other issue. If you need our assistance please contact us:
Toll Free 1.800.580.4985
International 517.322.0434
support@liquidweb.com
https://manage.liquidweb.com/

Be Sociable, Share!




    Copyright © 2011 Liquid Web, Inc. All Rights Reserved.