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IceWM is very configurable in terms of the look and feel of window decorations and menus, and offers a start button and cascading menus. It also offers multiple desktops and the capability to switch between them by clicking a panel applet. A good site for additional information about the IceWM window manager is http:// icewm.sourceforge.net/. IceWM is a great window manager with low resource requirements.

h o s t # cd /tmp h o s t # Is then because the path search looks in the current directory first, it would find and execute the program which had been left by the user. That program gets executed with root privileges and could be used to give the user concerned permanent privileged access to the system, for instance by installing a special account for the user which has root privileges. It should be clear that this is a security hazard. A common mistake which is frequently perpetrated by inexperienced administrators, and which is actually encouraged by some operating systems, is to run X11 applications with root privileges. Root should never run X11 or any other complex applications. There are just too many uncertainties involved. There are so many applications for X11 which come from different sources. There could be a Trojan horse in any one of them. If possible, root should only use a few trusted application programs.

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XFCE is in a similar tradition but has a launcher panel rather than menus. It comes with its own file manager called xftree. XFCE is actually more of a low-resource desktop environment than a simple window manager because it provides lightweight functionality for drag and drop and other desktop capabilities. The primary web site for XFCE is www.xfce.org.

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Window Maker has some strong advocates; it offers themes, menus, and icons, and is based on the look and feel of the NeXTStep environment. The primary web site for Window Maker is www.windowmaker.org/.

All users require help at some time or another. The fact that normal users are not privileged users means that they occasionally need to ask a superuser to clean up a mess, or fix a problem which is beyond their control. If we are to distinguish between privileged and nonprivileged users, we cannot deny users this service. The amount of support which one offers users is a matter of policy. System administrator's time is usually in short supply, though increased automation is steadily freeing us to concentrate on higher level problems, like support. The ability to support a system depends upon its size in relation to the available resource personell. Supporting hardware and software involves fixing errors, upgrading and perhaps providing tuition or telephone helpdesks. E-mail help desks such as Rust, Gnats, Nearnet, Netlog, PTS, QueueMH can assist in the organization of support services, but they are mainly task tracking tools. Sometimes hosts and software packages are labelled unsupported in order to emphasize to users that they are on their own if they insist on using those facilities. One of the challenges system administrators sometimes have to endure on coming to a new site, where chaos reigns, is the transition from anarchy to a smaller set of supported platforms and software. See, for instance, refs. [188, 153] This can be a tough problem, since users always prefer freedom to restriction. Support services need to be carefully considered and tailored to each local environment. A recent development in user assistance is the Virtual Network Computing model from AT&T [19]. This is a way to allow a remote user duplicate access to a graphical user interface. Thus, an administrator can log onto an existing user session and have dual controls, allowing users to be nurse-maided through difficulties on-line.

FVWM (see Figure 8-8) is another old favorite. In the early days of Linux it tended to be the default. It has a launcher rather than cascading menus, and multiple desktops with a nice desktop pager.

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