Learning Linux Shell Scripting - Second Edition

Process monitoring tools – top, iostat, and vmstat

We can view the native performance of various processes in an OS by using the following tools:

• To view a dynamic real-time view of the running processes in an OS, use the following command:

    $ top

An explanation of the top command generated output is as follows:

The $top command displays a lot of information about the running system.

The first line of the display is shown as follows:

The description of fields in the first line is as follows:

• Current time
• System uptime
• Number of users logged ...