interval—Defines how often to rotate the log; the actual setting will be
daily, weekly, monthly, or yearly
size—Defines how large a log file can become before it is rotated; this
setting supersedes the time interval setting above, and the format will be
a number and a unit, such as size 512k or size 128M or size
100G
compress—Configures the log file to be compressed
nocompress—Configures the log file to not be compressedWhat is more important to cover here than all of the individual options, which
you can look up in the man page, is that these individual configuration files
for specific applications will override the default settings in
/etc/logrotate.conf. If a setting is assigned a value in that file, it will
be used by all applications that logrotate affects unless an application-
specific file in /etc/logrotate.d includes the same setting.
Graphical Process- and System-
Management Tools
The GNOME and KDE desktop environments offer a rich set of network and
system- monitoring tools. Graphical interface elements, such as menus and
buttons, and graphical output, including metering and real-time load charts,
make these tools easy to use. These clients, which require an active X session
and in some cases root permission, are included with Ubuntu.
If you view the graphical tools locally while they are being run on a server,
you must have X properly installed and configured on your local machine.
Although some tools can be used to remotely monitor systems or locally
mounted remote file systems, you have to properly configure pertinent X11
environment variables, such as $DISPLAY, to use the software or use the
ssh client’s -X option when connecting to the remote host.
System Monitor
System Monitor is a graphical monitoring tool that is informative, easy to use
and understand, and very useful. It has tabs for information about running
processes, available resources, and local file systems.