因為很多軟體的相依性造成安裝上得不便，所以先在新版的linux發行套件（Linux Distribution）都包含線上更新的功能，在Fedora的發表套建中YUM(YelloDog Updater, Modified)是相當不錯的線上安裝更新軟體的工具！！！
YUM簡介：
YUM是由Duke University所發起的計劃之一，但是由於他的實用讓許多軟體套件製造商也採用這種機制，Fedora便是採用此機制！
你可以到以下網站查詢與下載這個軟體套件：
http://linux.duke.edu/projects/yum/index.ptml
使用yum有兩個步驟要做：
Step1.設定yum伺服器
#gedit /etc/yum.repos.d/dries.repo
[dries]
name=Extra Fedora rpms dries - $releasever - $basearch
baseurl=http://ftp.belnet.be/packages/dries.ulyssis.org/fedora/linux/$releasever/$basearch/dries/RPMS/
enabled=1
gpgcheck=1
Step2.設定GPG key[dries]
name=Extra Fedora rpms dries - $releasever - $basearch
baseurl=http://ftp.belnet.be/packages/dries.ulyssis.org/fedora/linux/$releasever/$basearch/dries/RPMS/
enabled=1
gpgcheck=1
#rpm --import http://apt.sw.be/dries/RPM-GPG-KEY.dries.txt
以下幾個是我常用的yum伺服器：
# gedit /etc/yum.repos.d/macromedia.repo[macromedia]
name=Macromedia for i386 Linux
baseurl=http://macromedia.rediris.es/rpm/
#baseurl=http://macromedia.mplug.org/rpm/
#baseurl=http://sluglug.ucsc.edu/macromedia/rpm/
enabled=1
gpgcheck=1
gpgkey=http://macromedia.rediris.es/FEDORA-GPG-KEY
# gedit /etc/yum.repos.d/dries.repo
[dries]
name=Extra Fedora rpms dries - $releasever - $basearch
baseurl=http://ftp.belnet.be/packages/dries.ulyssis.org/fedora/linux/$releasever/$basearch/dries/RPMS/
enabled=1
gpgcheck=1
# rpm --import http://apt.sw.be/dries/RPM-GPG-KEY.dries.txt
# gedit /etc/yum.repos.d/livna.repo
[livna]
name=Livna for Fedora Core $releasever - $basearch - Base
baseurl=
http://rpm.livna.org/fedora/$releasever/$basearch/
http://livna.cat.pdx.edu/fedora/$releasever/$basearch/
http://wftp.tu-chemnitz.de/pub/linux/livna/fedora/$releasever/$basearch/
http://ftp-stud.fht-esslingen.de/pub/Mirrors/rpm.livna.org/fedora/$releasever/$basearch/
failovermethod=priority
#mirrorlist=http://rpm.livna.org/mirrorlist-5
enabled=0
# rpm --import http://rpm.livna.org/RPM-LIVNA-GPG-KEYgpgcheck=1參考網站：http://www.stanton-finley.net/fedora_core_5_installation_notes.html
