每天学五分钟 Liunx 0010 | 软件篇: RPM 和 YUM


1. RPM

RPM(RedHat Package Manager),顾名思义是 RedHat 的软件包管理器。它遵循 GPL 规则且功能强大好用,从而逐渐运用到其它 Liunx 发行版中,包括 Fedora,CentOS 等。通过 RPM 可以很方便的查询,升级和安装软件包。
 
厂商提供软件时,会预先将软件编译打包成 RPM 包,其中包含预先检测系统和依赖软件的脚本等。用户使用对应的 RPM 包安装软件,在安装时 RPM 首先检测用户环境,依赖软件是否安装等信息,检测通过即开始安装软件。软件安装完成后,软件的相关信息会写到 /var/lib/rpm 目录下的数据库文件中,以后对软件的操作都会先到这个数据库文件中查询。
 

2. RPM 命令

以安装 xterm 软件为例,介绍 RPM 命令。
 
RPM 查询:
[root@test packages]# rpm -q[a|i|l|c|R|f]
# a: 列出所有已经安装的软件
# i: 列出软件的详细信息
# l: 列出软件所有的文件与目录所在的完整文件名
# c: 列出软件的设置文件
# R:列出软件有关的依赖软件所包含的文件
# f: 列出该文件属于哪个软件
 
[root@test packages]# rpm -qa | grep xterm
 
RPM 安装:
[root@test packages]# rpm -ivh package_name
# i: install
# v: 打印详细的安装信息
# h: 安装信息栏的方式显示安装进度
[root@test packages]# rpm -ivh xterm-295-3.el7.x86_64.rpm
Preparing...                          ################################# [100%]
Updating / installing...
   1:xterm-295-3.el7                  ################################# [100%]

 

RPM 验证:
前面提到软件完成之后,软件信息会记录到 /var/lib/rpm 目录下的数据库文件中。如果更改软件相关文件或者删除软件相关配置文件时,通过 RPM 命令的 -V 选项即可验证软件的哪些文件改动了,验证的方式就是将当前系统软件文件与数据库文件进行比较。
[root@test packages]# rpm -V[a|f]
# V: 后接软件名称,如果有文件改动则列出
# a: 列出系统所有可能被改动过的文件
# f: 后接文件,列出该文件是否被改动过
[root@test packages]# rpm -ql xterm
...
/usr/share/doc/xterm-295/THANKS
...
 
[root@test packages]# echo "thanks for you, xterm" >> /usr/share/doc/xterm-295/THANKS
[root@test packages]# rpm -V xterm
S.5....T  d /usr/share/doc/xterm-295/THANKS

 

可以看到,验证的输出有 S.5....T. 8 个字符,其中每个字符表示的意思是:
S: 文件的容量被改变;
M: 文件的类型被改变;
5: MD5 码被改变;
D: 设备的主/次码被改变;
L: Link 路径被改变;
U: 文件的所有者被改变;
G: 文件的所属用户组被改变;
T: 文件的创建时间被改变;
 
另外,第二项的 d 表示文件的类型是文档,除了 d 还有 c 表示配置文件,l license 文件,r readme 文件, g ghost 文件。
 
 
除了上面验证文件更改的方式,还有一种用数字证书 (gpg-key) 验证 rpm 包的方式。厂商发布 RPM 包时,会将 RPM 包的公钥提供给用户,用户在安装 RPM 包时, rpm 命令会将此公钥与 RPM 包的密钥信息作对比,如果一致,则予以下载,反之则给予警告并停止安装。
[root@test packages]# cd /etc/pki/rpm-gpg/
[root@test rpm-gpg]# ls
RPM-GPG-KEY-redhat-beta  RPM-GPG-KEY-redhat-legacy-former  RPM-GPG-KEY-redhat-legacy-release  RPM-GPG-KEY-redhat-legacy-rhx  RPM-GPG-KEY-redhat-release
[root@test rpm-gpg]# ll RPM-GPG-KEY-redhat-beta
-rw-r--r--. 1 root root 3375 Sep 27  2016 RPM-GPG-KEY-redhat-beta
[root@test rpm-gpg]# cat RPM-GPG-KEY-redhat-beta
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.2.6 (GNU/Linux)
 
mQINBEmkAzABEAC2/c7bP1lHQ3XScxbIk0LQWe1YOiibQBRLwf8Si5PktgtuPibT
kKpZjw8p4D+fM7jD1WUzUE0X7tXg2l/eUlMM4dw6XJAQ1AmEOtlwSg7rrMtTvM0A
BEtI7Km6fC6sU6RtBMdcqD1cH/6dbsfh8muznVA7UlX+PRBHVzdWzj6y8h84dBjo
gzcbYu9Hezqgj/lLzicqsSZPz9UdXiRTRAIhp8V30BD8uRaaa0KDDnD6IzJv3D9P
xQWbFM4Z12GN9LyeZqmD7bpKzZmXG/3drvfXVisXaXp3M07t3NlBa3Dt8NFIKZ0D
FRXBz5bvzxRVmdH6DtkDWXDPOt+Wdm1rZrCOrySFpBZQRpHw12eo1M1lirANIov7
**********************************************************************
-----END PGP PUBLIC KEY BLOCK-----
[root@test rpm-gpg]#
[root@test rpm-gpg]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-beta # 导入公钥到 RPM
 
RPM 卸载:
[root@test packages]# rpm -e
# e: erase
 
[root@test packages]# rpm -qa | grep xterm
xterm-295-3.el7.x86_64
[root@test packages]# rpm -e xterm
[root@test packages]# rpm -qa | grep xterm
[root@test packages]#
RPM 卸载要注意考虑软件依赖性问题,从上到下依次卸载!
 
 
当然,RPM 的缺点也是很明显的,如前说述,安装 RPM 包时,RPM 会去检查软件的依赖 rpm 包,如果依赖包没有安装则停止安装软件。需要将依赖的软件包事先装好,然后才能安装,很麻烦。为了解决这种依赖包安装的问题,YUM 在线升级安装的机制就应运而生。
 

3. YUM

YUM(Yellow dog Updater,Modified),是基于 rpm 包的软件管理器,它可以从指定服务器下载 rpm 包并且安装,而且它可以自动处理软件依赖关系,也可以方便的对软件进行查询,更新等操作。
 

4. YUM 工作原理

客户端在下载软件时,根据自带的 repo 文件到指定的 YUM 服务器下载清单列表,清单列表记录了软件的信息以及软件依赖关系等。清单列表和实际软件组成了软件仓库 repository。客户端将清单列表下到本地,再和本地 rpm 的数据库比较,如果发现需要下载的软件不在本地或者本地没有依赖包时会到 YUM 服务器中下载相应的软件包。同时,因为有了本地数据库和清单列表,也就知道哪些软件可以做 update 了。
 

5. YUM 命令

Individual packages
list
List package names from repositories
 yum list available
 List all available packages
 yum list installed
 List all installed packages
 yum list all
 List installed and available packages
 yum list kernel
 List installed and available packages
info
Dispaly information about a package
 yum info vsftpd
 List info about vsftpd package
deplist
Display dependencies for a package
 yum deplist nfs-utils
 List dependencies and packages providing them
provides
Find packages that provide the queried file
 yum provides "*bin/top"
 Show package that contains top command
 yum provides "*/README.top"
 Show package containing README.top file
search
Search package names and descriptions for a term
 yum search samba
 Find packages with samba in name or description
updateinfo
Get information about available package updates
 yum updateinfo security
 Get into on available security updates
Grups of packages
grouplist
List names of installed and available package groups
groupinfo 
Display description and contents of a package group
 yum groupinfo "Web Server"
 See packages in Web Server group
check-update
Query repositories for available package updates
groupinstall
install all packages in the selected group
 yum groupinstall "Web Server"
 Install Web Server packages
YUM repositories
repolist
Display enabled software repositories
repoinfo
Display information about enabled yum repositories
 yum repoinfo rhel-7-server-RPMs
 see info on rhel-7-server-rpms repo
makecache
Download yum repository data to cache
Install/Remove/Update packages with YUM
install
Install a package from a repo to system
 yum install vsftpd
 install the vsftpd package
update
update one or all packages on system
 yum update
 update all packages with available updates
 yum update httpd
 update the httpd package(if available)
update-to
update package to a particular version
upgrade
update packages taking obsoletes into account
localinstall
install a package from a local file,http,or ftp
 yum localinstall abc.i386.rpm
 install abc package from local directory
 yum localinstall http://myrepo/abc.i386.rpm
 install abc from FTP site
downgrade
Downgrade a package to an earlier version
 yum downgrade abc
 Downgrade the abc package to an earlier version
reinstall
reinstall the current version of a package
 yum reinstall util-liunx
 reinstall util-liunx
swap
remove one package and install another
 yum swap ftp lftp
 remove ftp package and install lftp
erase
Erase a package
 yum remove vsftpd
 remove the vsftpd package and dependencies
remove 
same with erase
Troubleshooting
check
Check the local RPM database for problems
history
View and use yum transactions
 yum history list
 List all yum install,update and erase actions
 yum history info 3
 show details of yum transaction 3
clean
clear out cached package data
 yum clean packages
 Delete packages saved in cache
 yum clean all
 Clean out all packages and meta data from cache
YUM related command(install yum-utils)
reposync
Synchronize yum repositories to a local directory
 reposync -r rhel-atomic-host-beta-rpms
 Get packages from repo
options for YUM commands
-y
Assume yes if prompted
-v
produce extra debugging output
--downloadonly
Download to /var/cache/yum/arch/prod/repo/packages/,but dot't install
 yum install --downlaodonly vsftpd
 Download vsftpd package to cache
 
 

6. YUM 实践

同使用 RPM 安装 xterm 软件的方式类似,这里使用 yum 的方式安装软件 xterm:
[root@test ~]# yum repolist all
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
repo id                                             repo name                                                                                  status
osp7_server                                         Red Hat Enterprise Linux Open Stack 7 Packages                                             enabled:    954
osp_optools_server                                  Red Hat Enterprise Linux Open Stack Tools Packages                                         disabled
osp_tools_server                                    Red Hat Enterprise Linux Open Stack Tools Packages                                         disabled
rhel-common                                         Red Hat Enterprise Linux 7.3 X86_64 Server Extra Packages                                  enabled:    228
rhel-extras                                         Red Hat Enterprise Linux 7.3 X86_64 Server Extra Packages                                  enabled:    465
rhel-optional                                       Red Hat Enterprise Linux 7.3 X86_64 Server Extra Packages                                  disabled
rhel-server                                         Red Hat Enterprise Linux 7.3 X86_64 Server Packages                                        enabled: 14,275
repolist: 15,922
 
[root@test ~]# yum list installed | grep xterm
[root@test ~]# yum list available | grep xterm
xterm.x86_64                             295-3.el7                   rhel-server
 
[root@test ~]# yum clean all
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Cleaning repos: osp7_server rhel-common rhel-extras rhel-server
Cleaning up everything
 
[root@test ~]# yum install xterm
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Bad id for repo: <repo_file_name>, byte = < 0
osp7_server                                                                                                                            | 2.9 kB  00:00:00
rhel-common                                                                                                                            | 2.9 kB  00:00:00
rhel-extras                                                                                                                            | 2.9 kB  00:00:00
rhel-server                                                                                                                            | 2.9 kB  00:00:00
(1/4): rhel-common/primary_db                                                                                                          | 102 kB  00:00:01
(2/4): rhel-extras/primary_db                                                                                                          | 184 kB  00:00:01
(3/4): osp7_server/primary_db                                                                                                          | 427 kB  00:00:02
(4/4): rhel-server/primary_db                                                                                                          |  27 MB  00:00:37
Resolving Dependencies
--> Running transaction check
---> Package xterm.x86_64 0:295-3.el7 will be installed
--> Processing Dependency: libXt.so.6()(64bit) for package: xterm-295-3.el7.x86_64
--> Processing Dependency: libXmu.so.6()(64bit) for package: xterm-295-3.el7.x86_64
--> Processing Dependency: libXaw.so.7()(64bit) for package: xterm-295-3.el7.x86_64
--> Running transaction check
---> Package libXaw.x86_64 0:1.0.12-5.el7 will be installed
---> Package libXmu.x86_64 0:1.1.2-2.el7 will be installed
---> Package libXt.x86_64 0:1.1.4-6.1.el7 will be installed
--> Finished Dependency Resolution
 
Dependencies Resolved
 
==============================================================================================================================================================
Package                           Arch                              Version                                     Repository                              Size
==============================================================================================================================================================
Installing:
xterm                             x86_64                            295-3.el7                                   rhel-server                            455 k
Installing for dependencies:
libXaw                            x86_64                            1.0.12-5.el7                                rhel-server                            190 k
libXmu                            x86_64                            1.1.2-2.el7                                 rhel-server                             71 k
libXt                             x86_64                            1.1.4-6.1.el7                               rhel-server                            173 k
 
Transaction Summary
==============================================================================================================================================================
Install  1 Package (+3 Dependent packages)
 
Total download size: 889 k
Installed size: 2.3 M
Is this ok [y/d/N]: y
Downloading packages:
(1/4): libXaw-1.0.12-5.el7.x86_64.rpm                                                                                                  | 190 kB  00:00:01
(2/4): libXt-1.1.4-6.1.el7.x86_64.rpm                                                                                                  | 173 kB  00:00:00
(3/4): libXmu-1.1.2-2.el7.x86_64.rpm                                                                                                   |  71 kB  00:00:01
(4/4): xterm-295-3.el7.x86_64.rpm                                                                                                      | 455 kB  00:00:00
--------------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                         329 kB/s | 889 kB  00:00:02
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : libXt-1.1.4-6.1.el7.x86_64                                                                                                                 1/4
  Installing : libXmu-1.1.2-2.el7.x86_64                                                                                                                  2/4
  Installing : libXaw-1.0.12-5.el7.x86_64                                                                                                                 3/4
  Installing : xterm-295-3.el7.x86_64                                                                                                                     4/4
  Verifying  : libXaw-1.0.12-5.el7.x86_64                                                                                                                 1/4
  Verifying  : libXmu-1.1.2-2.el7.x86_64                                                                                                                  2/4
  Verifying  : libXt-1.1.4-6.1.el7.x86_64                                                                                                                 3/4
  Verifying  : xterm-295-3.el7.x86_64                                                                                                                     4/4
 
Installed:
  xterm.x86_64 0:295-3.el7
 
Dependency Installed:
  libXaw.x86_64 0:1.0.12-5.el7                        libXmu.x86_64 0:1.1.2-2.el7                        libXt.x86_64 0:1.1.4-6.1.el7
 
Complete!
[root@test ~]# yum remove xterm
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Bad id for repo: <repo_file_name>, byte = < 0
Resolving Dependencies
--> Running transaction check
---> Package xterm.x86_64 0:295-3.el7 will be erased
--> Finished Dependency Resolution
 
Dependencies Resolved
 
==============================================================================================================================================================
Package                           Arch                               Version                                  Repository                                Size
==============================================================================================================================================================
Removing:
xterm                             x86_64                             295-3.el7                                @rhel-server                             1.2 M
 
Transaction Summary
==============================================================================================================================================================
Remove  1 Package
 
Installed size: 1.2 M
Is this ok [y/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Erasing    : xterm-295-3.el7.x86_64                                                                                                                     1/1
  Verifying  : xterm-295-3.el7.x86_64                                                                                                                     1/1
 
Removed:
  xterm.x86_64 0:295-3.el7
 
Complete!
 
[root@test ~]# yum install -y xterm
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Resolving Dependencies
--> Running transaction check
---> Package xterm.x86_64 0:295-3.el7 will be installed
--> Finished Dependency Resolution
 
Dependencies Resolved
 
==============================================================================================================================================================
Package                            Arch                                Version                                Repository                                Size
==============================================================================================================================================================
Installing:
xterm                              x86_64                              295-3.el7                              rhel-server                              455 k
 
Transaction Summary
==============================================================================================================================================================
Install  1 Package
 
Total download size: 455 k
Installed size: 1.2 M
Downloading packages:
xterm-295-3.el7.x86_64.rpm                                                                                                             | 455 kB  00:00:01
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : xterm-295-3.el7.x86_64                                                                                                                     1/1
  Verifying  : xterm-295-3.el7.x86_64                                                                                                                     1/1
 
Installed:
  xterm.x86_64 0:295-3.el7
 
Complete!
yum clean all 之后再下载软件包速度会变慢,因为缓存被清掉了。第二次再下载 xterm 包的时候速度就会快很多,因为这时候有缓存了。同时,第一次下载软件包的时候,相应的依赖包也会下载,remove 软件包 xterm 时,依赖包并没有 remove,所以第二次安装时只需要安装一个 xterm rpm 包即可。 
 

7. YUM 配置 

前面 yum repolist 列了好几个 repo,那么这些 repo 是在哪里配置的呢?
YUM 的 repo 配置是在 /etc/yum.repos.d/ 文件夹下配置的,文件下的 repo 文件以 .repo 结尾:
[root@test yum.repos.d]# ll /etc/yum.repos.d/
total 12
-rw-r--r--. 1 root root 1563 Mar 30  2019 lianhuasheng.repo
-rw-r--r--. 1 root root  358 Mar 30  2019 redhat.repo
 
打开文件 lianhuasheng.repo 看看里面的内容:
## RHEL ###
[rhel-server]
name=Red Hat Enterprise Linux 7.3 X86_64 Server Packages
# mirrorlist = http://apt.sw.be/redhat/el5/en/mirrors-rpmforge
baseurl=http://10.57.0.1:80/rhel-7/rhel-x86_64-server-7
        http://10.57.217.11:80/rhel-7/rhel-x86_64-server-7
gpgcheck=0
enabled=1
failovermethod=priority
 
[rhel-extras]
name=Red Hat Enterprise Linux 7.3 X86_64 Server Extra Packages
# mirrorlist = http://apt.sw.be/redhat/$releasever/en/mirrors-rpmforge
baseurl=http://10.57.0.1:80/rhel-7/rhel-x86_64-server-extras-7/
gpgcheck=1
enabled=1
gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY
exclude=cfengine nx-libs nxproxy nxagent libNX* libXcomp* perl-App-Daemon
...
 
各参数的意义如下:
rhel-server: repo 的 id,中括号不能少。id 是唯一的,否则 yum 不知道该用哪个 id 下载软件包和清单列表。
name: repo 的名字。
baseurl: 后接的是固定的 repo 地址,baseurl 可以接多个 url 地址,参数 failovermethod 设置多个 url 的策略,它有两个值 priority 和 roundrobin,priority 表示根据 url 顺序从第一个开始选,roundrobin 则是随机选择 url,如果连接失败了则选下一个。
enable: repo 是启动的,让 repo不启动可将 enable 设为 0。
gpgcheck: 是否验证 RPM 证书,设为 0 表示不验证,设为 1 则表示验证证书,同时使用 gpgkey 参数指明需要验证的证书位置。
mirrorlist: 列出容器使用的镜像网址,yum 会自行取找镜像网址。
exclude: 指定的软件不能升级和安装,* 表示通配符。
 
 
除了 repo 的配置文件之外,还有一个 YUM 的配置文件 yum.conf,在 /etc/ 目录下:
[root@test yum.repos.d]$ cat /etc/yum.conf
[main]
cachedir=/var/cache/yum/$basearch/$releasever
keepcache=1
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgcheck=1
plugins=1
installonly_limit=5
pkgpolicy=newest
proxy=http://10.0.0.1:8080/
 
主要参数意义如下:
cachedir: yum 缓存的目录,在此目录下存下载的 rpm 包和数据库(yum 的数据库和 rpm 的数据库是有关联的,yum 下载的软件包使用 rpm 命令也可以 list 出来)。默认配置为 /var/cache/yum。
keepcache: 安装完成是否保留软件包,0 为不保留,1 为保留。
exactarch: 值为 1,则 yum 只会安装和系统架构匹配的软件包。例如,yum 不会将 i686 的软件包安装在 i386 的系统架构中。反之设为 0 则会安装。
logfile: yum 日志文件位置。
obsoleters: 设为 1 则表示允许更新老的 RPM 包。
gpgcheck: 做证书验证。
plugins: 是否启用插件, 1 表示启用。
pkgpolicy:如果设置了多个 repository,而同一软件在不同的 repository 中同时存在,yum 应该安装哪一个。可通过 pkgpolicy 指定,它有两个值 newest 和 last,newest 表示 yum 会安装最新的版本。如果是 last 的话,yum 会将服务器 id 以字母表顺序排序,然后选择最后的那个服务器上的软件安装。如果软件的版本在多个 repo 中都是一样的,yum 只会列出一个 repo 的软件。
 
 
YUM 中的变量:
$releasever: 代表发行版的版本,从 [main] 部分的 distroverpkg 获取(yum.conf 文件),如果没有,则根据 redhat-release 包进行判断。
$arch:cpu 架构,如 i686,athlon 等
$basearch:cpu 基本架构组,如 i686 和 athlon 同属 i386,alpha 和 alphaev6 同属 alpha。
 

8. 配置国内 YUM 源

配置官方的 yum 源需要向订阅注册(收费的),同时还会有下载不稳定的问题。可以配置国内的 YUM 源快速安装软件。
中国科学技术大学 YUM 源:
# 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-$releasever - Base - mirrors.ustc.edu.cn
baseurl=http://mirrors.ustc.edu.cn/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=1
gpgkey=http://mirrors.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5
 
#released updates
[updates]
name=CentOS-$releasever - Updates - mirrors.ustc.edu.cn
baseurl=http://mirrors.ustc.edu.cn/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=http://mirrors.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5
 
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - mirrors.ustc.edu.cn
baseurl=http://mirrors.ustc.edu.cn/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=http://mirrors.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5
 
#packages used/produced in the build but not released
[addons]
name=CentOS-$releasever - Addons - mirrors.ustc.edu.cn
baseurl=http://mirrors.ustc.edu.cn/centos/$releasever/addons/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5
 
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - mirrors.ustc.edu.cn
baseurl=http://mirrors.ustc.edu.cn/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=http://mirrors.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5
 
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib - mirrors.ustc.edu.cn
baseurl=http://mirrors.ustc.edu.cn/centos/$releasever/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
gpgcheck=1
enabled=0
gpgkey=http://mirrors.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5
 
如果连接不上需要注意检查是不是代理的问题,中科大源地址可点这里
 
 
 
(完)
posted @ 2020-04-11 00:16  hxia043  阅读(452)  评论(0编辑  收藏  举报