March 2012
Beginner to intermediate
230 pages
7h 27m
English
Content preview from Linux Pocket Guide, 2nd Edition
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Viewing Processes
|
|
List process. |
uptime
|
View the system load. |
w
|
List active processes for all users. |
top
|
Monitor resource-intensive processes interactively. |
gnome-system-monitor
|
Monitor system load and processes graphically. |
xload
|
Simple, graphical monitor of system load. |
free
|
Display free memory. |
A process is a unit of work on a Linux system. Each program you run represents one or more processes, and Linux provides commands for viewing and manipulating them. Every process is identified by a numeric process ID, or PID.
Processes are different from jobs (see Shell Job Control): processes are part of the operating system, whereas jobs are higher-level constructs known only to the shell in which they’re running. A running program comprises one or more processes; a job consists of one or more programs executed as a shell command.
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