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Linux Process execution priorities

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Learn Linux, 101: Process execution priorities
Keeping your eye on what's going on
Ian Shields
Senior Programmer
IBM

02 February 2010

Learn how to set and change process priorities so that applications get as much processing
time as they need. You can use this material in this article to study for the LPI® 101 exam for
Linux system administrator certification, or just to learn for fun.
View more content in this series

About this series
This series of articles helps you learn Linux system administration tasks. You can also use
the material in these articles to prepare for Linux Professional Institute Certification level 1
(LPIC-1) exams.
See our series roadmap for a description of and link to each article in this series. The
roadmap is in progress and reflects the latest (April 2009) objectives for the LPIC-1 exams:
as we complete articles, we add them to the roadmap. In the meantime, though, you can find
earlier versions of similar material, supporting previous LPIC-1 objectives prior to April 2009,
in our LPI certification exam prep tutorials.

Overview
This article grounds you in the basic Linux techniques for managing execution process priorities.
Learn to:
• Understand process priorities
• Set process priorities
• Change process priorities
This article helps you prepare for Objective 103.6 in Topic 103 of the Linux Professional Institute's
Junior Level Administration (LPIC-1) exam 101. The objective has a weight of 2.

Prerequisites
To get the most from the articles in this series, you should have a basic knowledge of Linux and a
working Linux system on which you can practice the commands covered in this article. Sometimes
© Copyright IBM Corporation 2010
Learn Linux, 101: Process execution priorities

Trademarks
Page 1 of 8

developerWorks®

ibm.com/developerWorks/

different versions of a program will format output differently, so your results may not always
look exactly like the listings and figures shown here. The results in the examples shown here
were obtained on a Ubuntu 9.10 (Karmic Koala) distribution. This article builds on the concepts
discussed in the previous article "Learn Linux 101: Create, monitor, and kill processes."

Knowing your priorities
Connect with Ian
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Linux, like most modern operating systems, can run multiple processes. It...
© Copyright IBM Corporation 2010 Trademarks
Learn Linux, 101: Process execution priorities Page 1 of 8
Learn Linux, 101: Process execution priorities
Keeping your eye on what's going on
Ian Shields
Senior Programmer
IBM
02 February 2010
Learn how to set and change process priorities so that applications get as much processing
time as they need. You can use this material in this article to study for the LPI® 101 exam for
Linux system administrator certification, or just to learn for fun.
View more content in this series
About this series
This series of articles helps you learn Linux system administration tasks. You can also use
the material in these articles to prepare for Linux Professional Institute Certification level 1
(LPIC-1) exams.
See our series roadmap for a description of and link to each article in this series. The
roadmap is in progress and reflects the latest (April 2009) objectives for the LPIC-1 exams:
as we complete articles, we add them to the roadmap. In the meantime, though, you can find
earlier versions of similar material, supporting previous LPIC-1 objectives prior to April 2009,
in our LPI certification exam prep tutorials.
Overview
This article grounds you in the basic Linux techniques for managing execution process priorities.
Learn to:
Understand process priorities
Set process priorities
Change process priorities
This article helps you prepare for Objective 103.6 in Topic 103 of the Linux Professional Institute's
Junior Level Administration (LPIC-1) exam 101. The objective has a weight of 2.
Prerequisites
To get the most from the articles in this series, you should have a basic knowledge of Linux and a
working Linux system on which you can practice the commands covered in this article. Sometimes
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