If you want to change how often the
screen is updated, you can add the -d secs option, where secs is replaced by the number of seconds
between updates.
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Learning Basic Administration 4
FIGURE 4-5
System Monitor, in Ubuntu, allows you to view processes, resources, and devices.
By default, processes are sorted by CPU usage. You can sort processes numerically by PID (type N),
by age (type A), by resident memory usage (type M), or by time (type T). To return to CPU usage,
type P. To terminate a process, type k and enter the PID of the process you want to kill (listed in
the left column). Be careful to kill only processes you are sure you don??™t need or want.
Summary
Although you may be using Linux as a single-user system, many of the tasks you must perform to
keep your computer running are defined as administrator tasks. A special user account called the
root user is needed to do many of the things necessary to keep Linux working as you would like
it to. If you are administering a Linux system used by lots of people, the task of administration
becomes even larger. You must be able to add and support users, maintain the file systems, and
ensure that system performance serves your users well.
To help the administrator, Linux comes with a variety of command-line utilities and graphical windows
for configuring and maintaining your system.
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