yum list

[[email protected] sysconfig]# yum --help
Loaded plugins: fastestmirror, refresh-packagekit, security
Usage: yum [options] COMMAND

List of Commands:

check Check for problems in the rpmdb
check-update Check for available package updates
clean Remove cached data
deplist List a package's dependencies
distribution-synchronization Synchronize installed packages to the latest available versions
downgrade downgrade a package
erase Remove a package or packages from your system
groupinfo Display details about a package group
groupinstall Install the packages in a group on your system
grouplist List available package groups
groupremove Remove the packages in a group from your system
help Display a helpful usage message
history Display, or use, the transaction history
info Display details about a package or group of packages
install Install a package or packages on your system
list List a package or groups of packages
load-transaction load a saved transaction from filename
makecache Generate the metadata cache
provides Find what package provides the given value
reinstall reinstall a package
repolist Display the configured software repositories
resolvedep Determine which package provides the given dependency
search Search package details for the given string
shell Run an interactive yum shell
update Update a package or packages on your system
update-minimal Works like update, but goes to the 'newest' package match which fixes a problem that affects your system
updateinfo Acts on repository update information
upgrade Update packages taking obsoletes into account
version Display a version for the machine and/or available repos.

[email protected] yum.repos.d]# pwd
/etc/yum.repos.d
[[email protected] yum.repos.d]# ll
total 28
-rw-r--r--. 1 root root 2006 Jan 1 2018 CentOS6-Base-163.repo
-rw-r--r--. 1 root root 1991 Oct 23 2014 CentOS-Base.repo.old
-rw-r--r--. 1 root root 647 Oct 23 2014 CentOS-Debuginfo.repo
-rw-r--r--. 1 root root 289 Oct 23 2014 CentOS-fasttrack.repo
-rw-r--r--. 1 root root 630 Oct 23 2014 CentOS-Media.repo
-rw-r--r--. 1 root root 5394 Oct 23 2014 CentOS-Vault.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-$releasever - Base - 163.com
baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#released updates
[updates]
name=CentOS-$releasever - Updates - 163.com
baseurl=http://mirrors.163.com/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - 163.com
baseurl=http://mirrors.163.com/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - 163.com
baseurl=http://mirrors.163.com/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib - 163.com
baseurl=http://mirrors.163.com/centos/$releasever/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
[[email protected] yum.repos.d]#

[[email protected] ~]# vi /etc/yum.repos.d/CentOS-Base.repo
[base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

[base]：代表容器的名字！中刮號一定要存在，裡面的名稱則可以隨意取。但是不能有兩個相同的容器名稱， 否則 yum 會不曉得該到哪裡去找容器相關軟體清單檔案。
name：只是說明一下這個容器的意義而已，重要性不高！
mirrorlist=：列出這個容器可以使用的對映站臺，如果不想使用，可註解到這行；
baseurl=：這個最重要，因為後面接的就是容器的實際網址！ mirrorlist 是由 yum 程式自行去捉對映站臺， baseurl 則是指定固定的一個容器網址！我們剛剛找到的網址放到這裡來啦！
enable=1：就是讓這個容器被啟動。如果不想啟動可以使用 enable=0 喔！
gpgcheck=1：還記得 RPM 的數碼簽章嗎？這就是指定是否需要查閱 RPM 檔案內的數碼簽章！
gpgkey=：就是數碼簽章的公鑰檔所在位置！使用預設值即可。