Installation guide

Chapter 3. Boot Process, Init, and Shutdown 73
3.7.1.33. /etc/sysconfig/squid
The /etc/sysconfig/squid file is used to pass arguments to the squid daemon at boot time.
The squid daemon is a proxy caching server for Web client applications. For more information
on configuring a squid proxy server, use a Web browser to open the /usr/share/doc/squid-
version / directory (replace version with the squid version number installed on your
system). By default, this file sets squid top start in daemon mode and sets the amount of time before
it shuts itself down.
3.7.1.34. /etc/sysconfig/tux
The /etc/sysconfig/tux file is the configuration file for the Red Hat Content
Accelerator (formerly known as TUX), the kernel-based web server. For more information
on configuring the Red Hat Content Accelerator, use a Web browser to open the
/usr/share/doc/tux- version /tux/index.html (replace version with the version
number of TUX installed on your system). The parameters available for this file are listed in
/usr/share/doc/tux- version /tux/parameters.html.
3.7.1.35. /etc/sysconfig/ups
The /etc/sysconfig/ups file is used to specify information about any Uninterruptible Power Sup-
plies (UPS) connected to your system. A UPS can be very valuable for a Red Hat Linux system
because it gives you time to correctly shut down the system in the case of power interruption. The
following values may be used:
• SERVER=
value , where value is one of the following:
• yes — A UPS device is connected to your system.
• no — A UPS device is not connected to your system.
• MODEL= value , where value must be one of the following or set to NONE if no UPS is
connected to the system:
• apcsmart — For a APC SmartUPS™ or similar device.
• fentonups — For a Fenton UPS™.
• optiups — For an OPTI-UPS™ device.
• bestups — For a Best Power™ UPS.
• genericups — For a generic brand UPS.
• ups-trust425+625 — For a Trust™ UPS.
• DEVICE=
value , where value specifies where the UPS is connected, such as /dev/ttyS0.
• OPTIONS= value , where value is a special command that needs to be passed to the UPS.
3.7.1.36. /etc/sysconfig/vncservers
The /etc/sysconfig/vncservers file configures the way the Virtual Network Computing (VNC)
server starts up.
VNC is a remote display system which allows you to view a desktop environment not only on the
machine where it is running but across different networks on a variety of architectures.