Many administrators will never have to administer a cluster, and many won't be responsible for a large number of systems requiring central backup solutions. However, even administering a single system using command line tools and text editors can be a chore. Even clusters sometimes require administrative tasks on individual systems. Fortunately, there is an application that can ease many administrative tasks, is easy to use, and can handle many aspects of Unux administration. Itis called Webmin.
Up until Debian Sarge, Webmin was a part of Debian distributions. However, the Debian developer in charge of packaging it had difficulty keeping up with the frequent releases, and it was eventually dropped from Debian. However, the upstream Webmin developers maintain current packages that install cleanly. Some users have reported issues because Webmin does not always handle configuration files exactly as Debian intends, but it most certainly attempts to handle them in a compatible manner, and while some users have experienced problems with upgrades, many administrators are quite happy with Webmin.
As long as you are willing to deal with conflicts during upgrades, or restrict use of modules that have major configuration impacts, you will find Webmin quite useful.
