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2 bases and introduction

 2.2 liveCD of projects

LiveCD is often linux based, necessary for working neither the non removable disk still another partition boatable CD with an operating system. It runs completely and directly from CD, DVD or a USB stick; is not necessary an installation. The operating system is only written into the main memory and used so a virtual non removable disk. Configurations can be made and become however then on disk or USB stick stored. The program can besides data media such as non removable disks, USB sticks, disks or CDs access. Under Linux the matured hardware recognition makes Kudzu17 possible.
Besides their employment is completely independent from software on the PC, already installed. A aufwändige and every now and then time-intensive installation is not necessary. They normally offer a total package at application software, which can be tested so witthout obligation with the operating system, or also a certain task like e.g. virus scanning fulfill. They can come and become thus everywhere to the employment so '' the individual on the way office '' 18. In this thesis (diploma) liveCD is defined as follows:

Definition of a Live-CD19
LiveCD is a boatable operating system, often with Desktopumgebung, on CD or another boatable medium, which does not need non removable disk or like as well as no other installed operating system for working, but temporarly the RAM occupied and administers itself. A collection at application software offers such CD after a certain focus. Them are not pure boat or aid programme CD.


Table 1: Definition liveCD

The CDs offers so a large number at employment scenarios, which are summarized here: 20


Application type of liveCDs
  • Application surface
  • Safe Internet use
  • Education and training purposes
  • Safety programs for networks
  • Maintenance purposes: Plays, film, music
  • Strange and multilingual distributions
  • Regional contents
  • Emphasis CDs with software collections to certain topics like e.g. medicine, Juristik, biology
  • Diagnosis CDs for hardware tests
  • Employment as Firewall and/or servers
  • Maintenance CDs
  • Rescue and Recovery CDs with virus infestation or system crashes
  • Advertising purposes
  • Safe test and demonstration versions for different operating systems and application software
  • Complete installations of Linux systems completely configured
  • Or also simply to testing other operating systems

Table 2: Application type of liveCDs

Since the software is not changeable on that CD, liveCDs are reliably in the Anwendung.21 however often need the CDs more patience. Because a system, which boats, hardware recognition and configuration must accomplish again and again again, needs for the start and the execution of the programs longer and achieves a constant noise level. Besides all system attitudes and data purge with each meeting, if not even of the back safety device by USB stick, non removable disk or CD one thinks. Also is not possible with Linux liveCDs writing accesses to Windows partitions with NTFS. 22
A summary of the pro and cons of liveCDs is here dargestellt23:



Evaluation of a Live-CD24
Advantages Disadvantages
  • Safe, fast view of Linux
  • Current operating system without installation hurdles
  • Non removable disks etc. do not play a role
  • Thought out compression strategies make an enormous number possible of possible programs
  • Numerous application type, straight within the range Trouble Shooting (viruses, security, crashes etc.)
  • Free availability
  • Due to the multiplicity at distributions a suitable operating system can be selected for each system, also very old computers,
  • LiveCDs can be adapted to the own requirements and be passed on also to the Community
  • The CD is portable and can be flexibly used
  • The automatic hardware identification makes the use possible of components without additional driver installation
  • Operating systems and data already installed are not affected
  • All media, which BIOS interprets as boatable, can be used for a live-system
  • Permits a simple installation
  • Internet use without risk without virus danger
  • Acclimatizing time
  • The duration of the system start requires patience
  • Working becomes relatively '' tough ''
  • Storing data and attitudes and their bringing in must be taken into account with a renewed start
  • Quiet drive assemblies are of advantage, since the work with the CD drive assembly often achieves a constant noise level
  • Difficult installation of new programs for inexperienced users


LiveCDs gives it for many operating systems; also for Exoten such as BeOS, ReactOS or AFROS such CDs is developed. A short overview with resuming left gives it under [Wiki 2005] Live-CD.25 in the following Unterkapiteln is liveCD of projects both furthest in Germany spread and for this thesis (diploma) of relevant operating systems presented.


 

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