sudo vim /etc/yum.repos.d/CentOS-Base.repo
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[base]
name=CentOS-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releaseverarch=$basearchrepo=os
baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#released updates
[updates]
name=CentOS-$releasever - Updates
#mirrorlist=http://mirrorlist.centos.org/?release=$releaseverarch=$basearchrepo=updates
baseurl=http://mirrors.163.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releaseverarch=$basearchrepo=extras
baseurl=http://mirrors.163.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
#mirrorlist=http://mirrorlist.centos.org/?release=$releaseverarch=$basearchrepo=centosplus
baseurl=http://mirrors.163.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib
#mirrorlist=http://mirrorlist.centos.org/?release=$releaseverarch=$basearchrepo=contrib
baseurl=http://mirrors.163.com/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
接下來里面更新：sudo yum update
更新完后，下載幾個字體，wqy-microhei.ttc，YaHeiConsolas，Microsoft_YaHei等，然后在系統(tǒng)設(shè)置->外觀里面修改默認字體。
———RPMforge repository—————
有時候有些軟件可能在中心的repo里面的沒有，這時候最好使用RPMforge repository，但是這樣來的話升級的時候會有version沖突，于是可以這樣子設(shè)置：
先下載RPMForge的repo：
wget http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.2-1.el6.rf.x86_64.rpm
安裝：
rpm -ivh rpmforge-release-0.5.2-1.el6.rf.x86_64.rpm
you’ll get a warning, but it will proceed based on the flags that you set. warning: rpmforge-release-0.5.2-1.el6.rf.x86_64.rpm : Header V3 DSA/SHA1 Signature, key ID 6b8d79e6: NOKEY
Preparing... ########################################### [100%]
1:rpmforge-release ########################################### [100%]
接下來最最重要的就是設(shè)置優(yōu)先級了：
Now you need to edit /etc/yum.repos.d/CentOS-Base.repo and add these priorities to the bottoms of each of the following repo sections:
[base]
priority=1
[updates]
priority=1
[extras]
priority=1
Save your changes on this file and edit the rpmforge.repo file. You’ll only need to edit the one repository section.
[rpmforge]
priority=5
Save your changes and you’re finished.
-----------開始更新瀏覽器版本至firefox18-------------
參考文章：http://www.if-not-true-then-false.com/2011/install-firefox-on-fedora-centos-red-hat-rhel/
備份下先：
tar -cvzf $HOME/mozilla-firefox-profiles-backup.tar.gz $HOME/.mozilla/firefox/
su -
## Remi Dependency on CentOS 6 and Red Hat (RHEL) 6 ##
rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
## CentOS 6 and Red Hat (RHEL) 6 ##
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
檢查有用的版本：
yum --enablerepo=remi list firefox
# 更新或者安裝 Mozilla Firefox 18/10
yum --enablerepo=remi update firefox
# 啟動 Firefox 18/10
firefox
firefox安裝那個flash插件：
去adobe的官網(wǎng)上去下載，選擇tar.gz包，解壓，得到libflashplayer.so, 把這個文件復(fù)制到 /home/username/.mozilla/plugins目錄下，重啟firefox就行了。要注意的是，libflashplayer.so必須屬于指定普通用戶。
-------------install google chrome 24------------
sudo vim /etc/yum.repos.d/CentOS-Base.repo
[google64]
name=Google – x86_64
baseurl=http://dl.google.com/linux/rpm/stable/x86_64
enabled=1
gpgcheck=1
gpgkey=https://dl-ssl.google.com/linux/linux_signing_key.pub
安裝穩(wěn)定版本：sudo yum install google-chrome-stable
