比如说像：wget, yum等网络工具。
另外你不得不在网络－＞以太网－＞编辑中确定你的代理服务器的地址和网关，掩码等。而对于firefox你就不得不同时在编辑－＞＜首选项－＞高级－＞设置中确定好代理方式。
对于yum这个很复杂，也很简单，在网上收集了很多关于怎么配置yum的文献，终究所获太少。对于yum的两个**.repo文件的配置更是一无所获。所以下面贴出我的yum的配置文件，供参考。
1 fedora.repo
[fedora]
name=Fedora $releasever - $basearch
failovermethod=priority
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/releases/$releasever/Everything/$basearch/os/
mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=fedora-$releasever&arch=$basearch
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
[fedora-debuginfo]
name=Fedora $releasever - $basearch - Debug
failovermethod=priority
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/releases/$releasever/Everything/$basearch/debug/
mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=fedora-debug-$releasever&arch=$basearch
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
[fedora-source]
name=Fedora $releasever - Source
failovermethod=priority
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/releases/$releasever/Everything/source/SRPMS/
mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=fedora-source-$releasever&arch=$basearch
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora file:///etc/pki/rpm-gpg/RPM-GPG-KEY
2 fedora-updates.repo
[updates]
name=Fedora $releasever - $basearch - Updates
failovermethod=priority
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/updates/$releasever/$basearch/
mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=updates-released-f$releasever&arch=$basearch
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora
[updates-debuginfo]
name=Fedora $releasever - $basearch - Updates - Debug
failovermethod=priority
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/updates/$releasever/$basearch/debug/
mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=updates-released-debug-f$releasever&arch=$basearch
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora
[updates-source]
name=Fedora $releasever - Updates Source
failovermethod=priority
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/updates/$releasever/SRPMS/
mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=updates-released-source-f$releasever&arch=$basearch
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora
3. yum.conf 这是在一外文网站上收集所得，来之不易啊！
# This is a yum.conf for Fedora Core 3.
# It uses Fedora mirrors to make things faster,
# since the main Red Hat Fedora site is pretty slow.
#
# Also, if you look down in the "Alternate Repositories"
# section, you'll notice some disabled repositories.
# If you want to use them, just do:
#
# yum --enablerepo
#
# Where
# is your normal yum command.
#
# Authors:
# Maxwell Kanat-Alexander (max at fedorafaq dot org)
# Sindre Pedersn Bjørdal (foolish at fedorafaq dot org)
#
# Date: 6 February 2005
#
# Changes
# -------
# 6 February 2005
# + Fedora Extras!
# + Dries Mirrors
# + Fixed a Livna mirror.
# 26 November 2004
# + Updated ATrpms per Axel Thimm's request.
# 22 November 2004
# + Updated for Fedora Core 3
# 04 November 2004
# + Fixed and checked-over for publishing
# 17 July 2004 (Sindre)
# + Replaced Base, debug, updates-released and updates mirrors with faster ones.
# + Added the official servers to base and updates, commented of course.
# + Tested all non-commented parts, everything works.
# 29 May 2004
# + Tested commented-out parts: all work except subpop.net
# + Livna and NewRPMs mirrors!
# 22 May 2004
# + Incorporated Darrenn's fixes for Fedora Core 2!
# + Commented-out parts may still not work properly
# 29 Feb 2004
# + Updated a lot of mirrors, for speed
# + Fixed one ATrpms mirror
# + Added Dries and spc, two more FreshRPMs-compatible repos
# 9 Jan 2004
# + Updated ATrpms for their new directory structure.
# 31 Dec 2003
# + Added JPackage, commented out
# + Standard Red Hat Fedora Core sites commented-out by default
# + Removed dulug from debug, since it doesn't have debug
# 29 Dec 2003
# + Added mirrors for the flash-plugin, since some go down.
# + Added base-debuginfo, commented out
[main]
cachedir=/var/cache/yum
debuglevel=2
logfile=/var/log/yum.log
pkgpolicy=newest
distroverpkg=fedora-release
tolerant=1
exactarch=0
# Added this because some mirrors go down and then retying takes forever.
retries=1
timeout=10
# Basic Repos are in /etc/yum.conf.d/ #
###################
## Fedora Extras ##
###################
[extras]
name=Fedora Extras - $releasever - $basearch
baseurl=http://fr2.rpmfind.net/linux/fedora/extras/$releasever/$basearch/
http://mirrors.kernel.org/fedora/extras/$releasever/$basearch/
http://mirror.hiwaay.net/redhat/fedora/linux/extras/$releasever/$basearch/
http://www.mirrorservice.org/sites/download.fedora.redhat.com/pub/fedora/linux/extras/$releasever/$basearch/
# http://download.fedora.redhat.com/pub/fedora/linux/extras/$releasever/$basearch/
gpgcheck=0
gpgkey=http://download.fedora.redhat.com/pub/fedora/linux/extras/RPM-GPG-KEY-Fedora-Extras
############
# Jpackage #
############
# JPackage is a GREAT repository for Java Software.
# However, you may have to compile some SRPMs to use it,
# so it's commented out by default. See
#
# For the SRPMs, and
# the general details.
#
# Note: JPackage IS compatible with the fedora.us repositories.
# You can use JPackage and fedora.us at the same time, without
# any trouble. It's also compatible with the Alternate Repositories,
# for the most part.
[jpackage-generic]
name=JPackage Cross-Platform Packages
baseurl=http://mirrors.sunsite.dk/jpackage/1.6/generic/free
ftp://jpackage.hmdc.harvard.edu/JPackage/1.6/generic/free
http://sunsite.informatik.rwth-aachen.de/ftp/pub/Linux/jpackage/1.6/generic/free
failovermethod=priority
enabled=0
#gpgcheck=1
[jpackage-fedora]
name=JPackage Fedora Packages
baseurl=http://mirrors.sunsite.dk/jpackage/1.6/fedora-$releasever/free
ftp://jpackage.hmdc.harvard.edu/JPackage/1.6/fedora-$releasever/free
http://sunsite.informatik.rwth-aachen.de/ftp/pub/Linux/jpackage/1.6/fedora-$releasever/free
failovermethod=priority
enabled=0
#gpgcheck=1
############################
## Alternate Repositories ##
############################
# To use these repos, either use the --enablerepo
# command-line argument to yum, or change "enabled=0"
# to "enabled=1". Note: Some packagesfrom these repositories
# may conflict with the fedora.us packages. If you use these
# repositories, you may wish to disable the fedora.us and
# livna.org repositories.
[freshrpms]
name=FreshRPMs
mirrorlist=http://ayo.freshrpms.net/fedora/linux/$releasever/mirrors-freshrpms
enabled=0
#gpgcheck=1
[dag]
name=Dag APT Repository
baseurl=http://dag.freshrpms.net/fedora/$releasever/en/$basearch/dag/
http://dag.atrpms.net/fedora/$releasever/en/$basearch/dag/
http://ftp.heanet.ie/pub/freshrpms/pub/dag/fedora/$releasever/en/$basearch/dag/
enabled=0
#gpgcheck=1
[dries]
name=Dries APT/YUM Repository
baseurl=http://ftp.freshrpms.net/pub/dag/dries/fedora/linux/$releasever/$basearch/dries/RPMS/
http://mirrors.ircam.fr/pub/dag/dries/fedora/linux/$releasever/$basearch/dries/RPMS/
http://apt.sw.be/dries/fedora/linux/$releasever/$basearch/dries/RPMS/
http://dries.studentenweb.org/yum/fedora/linux/$releasever/$basearch/dries/RPMS/
enabled=0
#gpgcheck=1
[newrpms]
name=NewRPMs
baseurl=http://newrpms.sunsite.dk/apt/redhat/en/$basearch/fc$releasever
http://newrpms.atrpms.net/apt/redhat/en/$basearch/fc$releasever
enabled=0
#gpgcheck=1
[atrpms]
name=ATrpms - Stable
baseurl=http://apt.atrpms.net/fedora/$releasever/en/$basearch/at-stable
http://ftp-stud.fht-esslingen.de/atrpms/download.atrpms.net/fedora/$releasever/en/$basearch/at-stable
http://wftp.tu-chemnitz.de/pub/linux/ATrpms/fedora/$releasever/en/$basearch/at-stable
enabled=0
#gpgcheck=1
[atrpms-testing]
name=ATrpms - Testing
baseurl=http://wftp.tu-chemnitz.de/pub/linux/ATrpms/fedora/$releasever/en/$basearch/at-testing
http://apt.atrpms.net/fedora/$releasever/en/$basearch/at-testing
http://ftp-stud.fht-esslingen.de/atrpms/download.atrpms.net/fedora/$releasever/en/$basearch/at-testing
enabled=0
#gpgcheck=1
# Warning: Don't enable this "bleeding" repo if you want stable software!
[atrpms-bleeding]
name=ATrpms - Bleeding
baseurl=http://apt.atrpms.net/fedora/$releasever/en/$basearch/at-bleeding
http://ftp-stud.fht-esslingen.de/atrpms/download.atrpms.net/fedora/$releasever/en/$basearch/at-bleeding
http://wftp.tu-chemnitz.de/pub/linux/ATrpms/fedora/$releasever/en/$basearch/at-bleeding
enabled=0
#gpgcheck=1
###################
## Miscellaneous ##
###################
# Semi-official Macromedia repository containing the flash-plugin rpm.
[flash]
name=macromedia.mplug.org - Flash Plugin
baseurl=http://macromedia.mplug.org/apt/fedora/$releasever
http://sluglug.ucsc.edu/macromedia/apt/fedora/$releasever
http://ruslug.rutgers.edu/macromedia/apt/fedora/$releasever
http://macromedia.rediris.es/apt/fedora/$releasever
enabled=0
#gpgcheck=1