管理軟體套件庫
可以免費安裝在Kubuntu上的軟體有成千上萬個。這些軟體都存放在軟體套件庫(repositories)中以便經由網路安裝。這樣使得在Linux下安裝新軟體非常容易，而且也非常安全，因為在安裝前，每個程式都專門為Kubuntu編譯和檢查過。為了便於管理這些軟體，Kubuntu軟體套件庫被分為4個部分：Main，Restricted，Universe和Multiverse。
軟體分類原則基於以下兩個因素
The level of support software development teams provide for a program
The level of compliance the program has to the Free Software Philosophy
You can find more information about the Repositories available on the Ubuntu website.
The standard Kubuntu Install CD contains some software from the Main and Restricted categories. Once your system is made aware of the Internet-based locations for these repositories, many more programs are made available for installation. Using the software package management tools already installed on your system, you can search for, install and update any piece of software directly over the Internet, without the need for the CD.
The Kubuntu Install CD-ROM is included in the repositories after installation. This can cause Adept to ask for the CD-ROM when installing packages. It is possible to disable this repository so that Adept relies solely on the internet repositories.
停用CD-ROM套件庫：
想執行Adept程式，請選擇->->
在Adept軟體套件管理視窗中選擇->。
Find the repository line that starts with "cdrom:", click the line, and select .
Click Apply to save your changes, and then exit using Close.
啟用額外的軟體套件庫
想執行Adept程式，請選擇->->
在Adept軟體套件管理視窗中選擇->。
To enable the Universe repository, find the repository line with the Universe Component, and click the line and select .
Adding this repository will mean that the majority of the Free Software universe will be available to install on your system. This software is supported by a carefully selected group of volunteers within the Kubuntu Community, but is not supported by the core Kubuntu development team and may not include security updates.
To enable the Multiverse repository, find the repository lines (two of them) with the Universe Component, and click the word "universe". Edit the entry so that it reads "universe multiverse". click the line and select to enable it if it is not already enabled.
增加non-free軟體套件庫以為著你將能夠安裝non-free類的軟體。但此類軟體可能會有法律許可方面的問題。你應該核實你所在地的法律允許你使用這些軟體。強調一下，這些軟體不會有安全更新！
Click Apply to save your changes, and then exit using Close.
